diff --git a/_maps/RandomRuins/LavaRuins/lavaland_surface_shuttle_wreckage.dmm b/_maps/RandomRuins/LavaRuins/lavaland_surface_shuttle_wreckage.dmm
index 7a8c7bfacdc..b81d20e262d 100644
--- a/_maps/RandomRuins/LavaRuins/lavaland_surface_shuttle_wreckage.dmm
+++ b/_maps/RandomRuins/LavaRuins/lavaland_surface_shuttle_wreckage.dmm
@@ -284,7 +284,7 @@
 /turf/open/misc/asteroid/basalt/lava_land_surface/biome_replace,
 /area/ruin/unpowered)
 "KN" = (
-/obj/structure/spawner/lavaland/legion,
+/mob/living/basic/mining/tendril,
 /turf/open/misc/asteroid/basalt/lava_land_surface/biome_replace,
 /area/ruin/unpowered)
 "Lz" = (
diff --git a/code/__DEFINES/ai/monsters.dm b/code/__DEFINES/ai/monsters.dm
index 1f54a54784d..8a4e9d56aa5 100644
--- a/code/__DEFINES/ai/monsters.dm
+++ b/code/__DEFINES/ai/monsters.dm
@@ -52,6 +52,11 @@
 /// Key where goliath stores a hole it wants to get into
 #define BB_GOLIATH_HOLE_TARGET "BB_goliath_hole"
 
+// Tendril AI keys
+#define BB_TENDRIL_LASH "tendril_lash"
+#define BB_TENDRIL_CHASER "tendril_chaser"
+#define BB_TENDRIL_SPIKES "tendril_spikes"
+
 // bee keys
 ///the bee hive we live inside
 #define BB_CURRENT_HOME "BB_current_home"
diff --git a/code/__DEFINES/dcs/signals/signals_mining.dm b/code/__DEFINES/dcs/signals/signals_mining.dm
index 13ec648c1ba..494068f3707 100644
--- a/code/__DEFINES/dcs/signals/signals_mining.dm
+++ b/code/__DEFINES/dcs/signals/signals_mining.dm
@@ -4,6 +4,9 @@
 /// Fired by a mob which has been grabbed by a goliath
 #define COMSIG_GOLIATH_TENTACLED_GRABBED "comsig_goliath_tentacle_grabbed"
 	#define COMPONENT_GOLIATH_CANCEL_TENTACLE_GRAB (1<<0)
+/// Fired by a mob which has been grabbed by a tendril
+#define COMSIG_TENDRIL_TENTACLED_GRABBED "comsig_tendril_tentacle_grabbed"
+	#define COMPONENT_TENDRIL_CANCEL_TENTACLE_GRAB (1<<0)
 /// Fired by a goliath tentacle which is returning to the earth
 #define COMSIG_GOLIATH_TENTACLE_RETRACTING 	"comsig_goliath_tentacle_retracting"
 /// Fired by a mob which has triggered a brimdust explosion from itself (not the mobs that get hit)
diff --git a/code/__DEFINES/traits/declarations.dm b/code/__DEFINES/traits/declarations.dm
index 8fc2af35f4b..317b17c2d7e 100644
--- a/code/__DEFINES/traits/declarations.dm
+++ b/code/__DEFINES/traits/declarations.dm
@@ -1663,6 +1663,9 @@ Remember to update _globalvars/traits.dm if you're adding/removing/renaming trai
 /// Sunlight on this turf is blocked and thus you can't get solar power or whatever
 #define TRAIT_TURF_SUN_BLOCKED "turf_sun_blocked"
 
+/// Cannot be backstabbed with a crusher
+#define TRAIT_BACKSTAB_IMMUNE "backstab_immune"
+
 /// Makes the owner immune from the pacification from synthpax
 #define TRAIT_SYNTHPAX_IMMUNE "synthpax_immune"
 
diff --git a/code/_globalvars/traits/_traits.dm b/code/_globalvars/traits/_traits.dm
index 9dcc0090962..24127005b6e 100644
--- a/code/_globalvars/traits/_traits.dm
+++ b/code/_globalvars/traits/_traits.dm
@@ -188,6 +188,7 @@ GLOBAL_LIST_INIT(traits_by_type, list(
 		"TRAIT_ANXIOUS" = TRAIT_ANXIOUS,
 		"TRAIT_APATHETIC" = TRAIT_APATHETIC,
 		"TRAIT_ATTEMPTING_CHRISTENING" = TRAIT_ATTEMPTING_CHRISTENING,
+		"TRAIT_BACKSTAB_IMMUNE" = TRAIT_BACKSTAB_IMMUNE,
 		"TRAIT_BADDNA" = TRAIT_BADDNA,
 		"TRAIT_BADTOUCH" = TRAIT_BADTOUCH,
 		"TRAIT_BALD" = TRAIT_BALD,
diff --git a/code/datums/actions/mobs/projectileattack.dm b/code/datums/actions/mobs/projectileattack.dm
index f27c0671c1f..183df71e03f 100644
--- a/code/datums/actions/mobs/projectileattack.dm
+++ b/code/datums/actions/mobs/projectileattack.dm
@@ -5,7 +5,7 @@
 	desc = "Fires a set of projectiles at a selected target."
 	cooldown_time = 1.5 SECONDS
 	/// The type of the projectile to be fired
-	var/projectile_type
+	var/obj/projectile/projectile_type
 	/// The sound played when a projectile is fired
 	var/projectile_sound
 	/// If the projectile should home in on its target
@@ -58,7 +58,7 @@
 		our_projectile.set_homing_target(target)
 	if(isnum(set_angle))
 		our_projectile.fire(set_angle)
-		return
+		return our_projectile
 	our_projectile.fire()
 	return our_projectile
 
diff --git a/code/datums/ai/basic_mobs/basic_ai_behaviors/basic_attacking.dm b/code/datums/ai/basic_mobs/basic_ai_behaviors/basic_attacking.dm
index 9d9f995e17f..5b41ae5254d 100644
--- a/code/datums/ai/basic_mobs/basic_ai_behaviors/basic_attacking.dm
+++ b/code/datums/ai/basic_mobs/basic_ai_behaviors/basic_attacking.dm
@@ -24,17 +24,8 @@
 	var/atom/target = controller.blackboard[target_key]
 	if (isnull(target))
 		return AI_BEHAVIOR_DELAY | AI_BEHAVIOR_FAILED
-	if (!target.IsReachableBy(controller.pawn))
-		controller.clear_blackboard_key(BB_BASIC_MOB_MELEE_COOLDOWN_TIMER)
-		return AI_BEHAVIOR_INSTANT
 
-	var/can_attack_time = controller.blackboard[BB_BASIC_MOB_MELEE_COOLDOWN_TIMER]
-	if (isnull(can_attack_time))
-		var/blackboard_delay = controller.blackboard[BB_BASIC_MOB_MELEE_DELAY]
-		var/attack_delay = isnull(blackboard_delay) ? DEFAULT_ATTACK_DELAY : blackboard_delay
-		controller.set_blackboard_key(BB_BASIC_MOB_MELEE_COOLDOWN_TIMER, world.time + attack_delay)
-		return AI_BEHAVIOR_INSTANT
-	if (can_attack_time > world.time)
+	if (!can_attack(controller, target))
 		return AI_BEHAVIOR_INSTANT
 
 	if (isliving(controller.pawn))
@@ -56,6 +47,23 @@
 		return AI_BEHAVIOR_DELAY | AI_BEHAVIOR_SUCCEEDED
 	return AI_BEHAVIOR_DELAY
 
+/datum/ai_behavior/basic_melee_attack/proc/can_attack(datum/ai_controller/controller, atom/target)
+	if (!target.IsReachableBy(controller.pawn))
+		controller.clear_blackboard_key(BB_BASIC_MOB_MELEE_COOLDOWN_TIMER)
+		return FALSE
+
+	var/can_attack_time = controller.blackboard[BB_BASIC_MOB_MELEE_COOLDOWN_TIMER]
+	if (isnull(can_attack_time))
+		var/blackboard_delay = controller.blackboard[BB_BASIC_MOB_MELEE_DELAY]
+		var/attack_delay = isnull(blackboard_delay) ? DEFAULT_ATTACK_DELAY : blackboard_delay
+		controller.set_blackboard_key(BB_BASIC_MOB_MELEE_COOLDOWN_TIMER, world.time + attack_delay)
+		return FALSE
+
+	if (can_attack_time > world.time)
+		return FALSE
+
+	return TRUE
+
 /datum/ai_behavior/basic_melee_attack/finish_action(datum/ai_controller/controller, succeeded, target_key, targeting_strategy_key, hiding_location_key)
 	. = ..()
 	controller.clear_blackboard_key(BB_BASIC_MOB_MELEE_COOLDOWN_TIMER)
@@ -78,7 +86,7 @@
 	/// range we will try chasing the target before giving up
 	var/chase_range = 9
 	///do we care about avoiding friendly fire?
-	var/avoid_friendly_fire =  FALSE
+	var/avoid_friendly_fire = FALSE
 
 /datum/ai_behavior/basic_ranged_attack/setup(datum/ai_controller/controller, target_key, targeting_strategy_key, hiding_location_key)
 	. = ..()
diff --git a/code/datums/ai/basic_mobs/basic_ai_behaviors/targeting.dm b/code/datums/ai/basic_mobs/basic_ai_behaviors/targeting.dm
index bf7d128fef9..b2aaaa23578 100644
--- a/code/datums/ai/basic_mobs/basic_ai_behaviors/targeting.dm
+++ b/code/datums/ai/basic_mobs/basic_ai_behaviors/targeting.dm
@@ -35,7 +35,6 @@ GLOBAL_LIST_INIT(target_interested_atoms, typecacheof(list(/mob, /obj/machinery/
 		return AI_BEHAVIOR_DELAY | AI_BEHAVIOR_FAILED
 
 	var/aggro_range = controller.blackboard[aggro_range_key] || vision_range
-
 	controller.clear_blackboard_key(target_key)
 
 	// If we're using a field rn, just don't do anything yeah?
diff --git a/code/datums/ai/basic_mobs/basic_subtrees/simple_find_target.dm b/code/datums/ai/basic_mobs/basic_subtrees/simple_find_target.dm
index 52524852961..9824d41f823 100644
--- a/code/datums/ai/basic_mobs/basic_subtrees/simple_find_target.dm
+++ b/code/datums/ai/basic_mobs/basic_subtrees/simple_find_target.dm
@@ -3,10 +3,12 @@
 	var/target_key = BB_BASIC_MOB_CURRENT_TARGET
 	/// Targeting strategy key to use
 	var/strategy_key = BB_TARGETING_STRATEGY
+	/// Behavior to use to find targets
+	var/target_behavior = /datum/ai_behavior/find_potential_targets
 
 /datum/ai_planning_subtree/simple_find_target/SelectBehaviors(datum/ai_controller/controller, seconds_per_tick)
 	. = ..()
-	controller.queue_behavior(/datum/ai_behavior/find_potential_targets, target_key, strategy_key, BB_BASIC_MOB_CURRENT_TARGET_HIDING_LOCATION)
+	controller.queue_behavior(target_behavior, target_key, strategy_key, BB_BASIC_MOB_CURRENT_TARGET_HIDING_LOCATION)
 
 // Prevents finding a target if a human is nearby
 /datum/ai_planning_subtree/simple_find_target/not_while_observed
@@ -21,9 +23,8 @@
 	target_key = BB_BASIC_MOB_FLEE_TARGET
 
 /datum/ai_planning_subtree/simple_find_target/increased_range
-
-/datum/ai_planning_subtree/simple_find_target/increased_range/SelectBehaviors(datum/ai_controller/controller, seconds_per_tick)
-	controller.queue_behavior(/datum/ai_behavior/find_potential_targets/bigger_range, target_key, strategy_key, BB_BASIC_MOB_CURRENT_TARGET_HIDING_LOCATION)
+	target_behavior = /datum/ai_behavior/find_potential_targets/bigger_range
 
 /datum/ai_planning_subtree/simple_find_target/hunt
 	strategy_key = BB_HUNT_TARGETING_STRATEGY
+
diff --git a/code/datums/ai/basic_mobs/basic_subtrees/target_retaliate.dm b/code/datums/ai/basic_mobs/basic_subtrees/target_retaliate.dm
index f1c04e1d8a7..c8699405461 100644
--- a/code/datums/ai/basic_mobs/basic_subtrees/target_retaliate.dm
+++ b/code/datums/ai/basic_mobs/basic_subtrees/target_retaliate.dm
@@ -9,9 +9,11 @@
 	var/hiding_place_key = BB_BASIC_MOB_CURRENT_TARGET_HIDING_LOCATION
 	/// do we check for faction?
 	var/check_faction = FALSE
+	/// Behavior to use to select our target
+	var/target_behavior = /datum/ai_behavior/target_from_retaliate_list
 
 /datum/ai_planning_subtree/target_retaliate/SelectBehaviors(datum/ai_controller/controller, seconds_per_tick)
-	controller.queue_behavior(/datum/ai_behavior/target_from_retaliate_list, BB_BASIC_MOB_RETALIATE_LIST, target_key, targeting_strategy_key, hiding_place_key, check_faction)
+	controller.queue_behavior(target_behavior, BB_BASIC_MOB_RETALIATE_LIST, target_key, targeting_strategy_key, hiding_place_key, check_faction)
 
 /datum/ai_planning_subtree/target_retaliate/check_faction
 	check_faction = TRUE
diff --git a/code/datums/ai/telegraph_effects.dm b/code/datums/ai/telegraph_effects.dm
index 62bbe9a0397..b658c651988 100644
--- a/code/datums/ai/telegraph_effects.dm
+++ b/code/datums/ai/telegraph_effects.dm
@@ -6,6 +6,14 @@
 	light_range = 1
 	duration = 2 SECONDS
 
+/obj/effect/temp_visual/telegraphing/Initialize(mapload)
+	. = ..()
+	update_appearance(UPDATE_OVERLAYS)
+
+/obj/effect/temp_visual/telegraphing/update_overlays()
+	. = ..()
+	. += emissive_appearance(icon, icon_state, src, alpha = 90)
+
 /obj/effect/temp_visual/telegraphing/vending_machine_tilt
 	duration = 1 SECONDS
 
@@ -15,7 +23,18 @@
 	src.duration = duration
 	return ..()
 
-/obj/effect/temp_visual/telegraphing/thunderbolt
+/obj/effect/temp_visual/telegraphing/circle
 	icon = 'icons/mob/telegraphing/telegraph.dmi'
 	icon_state = "target_circle"
 	duration = 2 SECONDS
+
+/obj/effect/temp_visual/telegraphing/circle/short
+	duration = 1 SECONDS
+
+/obj/effect/temp_visual/telegraphing/line
+	icon = 'icons/mob/telegraphing/telegraph.dmi'
+	icon_state = "line"
+	duration = 0.8 SECONDS
+
+/obj/effect/temp_visual/telegraphing/line/short
+	duration = 0.5 SECONDS
diff --git a/code/datums/mapgen/CaveGenerator.dm b/code/datums/mapgen/CaveGenerator.dm
index 097e8740aff..63b47165db4 100644
--- a/code/datums/mapgen/CaveGenerator.dm
+++ b/code/datums/mapgen/CaveGenerator.dm
@@ -325,7 +325,7 @@
 			is_megafauna = TRUE
 
 		var/can_spawn = TRUE
-		if(ispath(picked_mob, /obj/structure/spawner/lavaland))
+		if(ispath(picked_mob, /mob/living/basic/mining/tendril))
 			// Prevents tendrils spawning in each other's collapse range
 			for(var/turf/spawn_turf as anything in spawn_data[CAVE_SPAWN_TENDRIL])
 				if (get_dist(spawn_turf, target_turf) <= 2)
@@ -352,7 +352,7 @@
 		if (!can_spawn)
 			continue
 
-		if (ispath(picked_mob, /obj/structure/spawner/lavaland))
+		if (ispath(picked_mob, /mob/living/basic/mining/tendril))
 			spawn_data[CAVE_SPAWN_TENDRIL] += target_turf
 		else
 			if (is_megafauna)
diff --git a/code/datums/mapgen/biomes/_biome.dm b/code/datums/mapgen/biomes/_biome.dm
index 8dc588680a8..dc2a17563b3 100644
--- a/code/datums/mapgen/biomes/_biome.dm
+++ b/code/datums/mapgen/biomes/_biome.dm
@@ -33,6 +33,8 @@
 	var/mob_exclusion_radius = 12
 	/// Radius around megafauna within which we avoid spawning tendrils
 	var/megafauna_exclusion_radius = 7
+	/// Minimum distance between tendril spawns
+	var/tendril_exclusion_radius = 12
 
 /datum/biome/New()
 	. = ..()
@@ -168,18 +170,21 @@
 			is_megafauna = TRUE
 
 		var/can_spawn = TRUE
-		if(ispath(picked_mob, /obj/structure/spawner/lavaland))
-			// Prevents tendrils spawning in each other's collapse range
+		if(ispath(picked_mob, /mob/living/basic/mining/tendril))
 			for(var/turf/spawn_turf as anything in spawn_data[CAVE_SPAWN_TENDRIL])
-				if (get_dist(spawn_turf, target_turf) <= 2)
+				if (get_dist(spawn_turf, target_turf) <= tendril_exclusion_radius)
 					can_spawn = FALSE
 					break
 
+			if (!can_spawn)
+				continue
+
 			// Also avoid spawning them next to megafauna
 			for(var/turf/spawn_turf as anything in spawn_data[CAVE_SPAWN_MEGAFAUNA])
 				if (get_dist(spawn_turf, target_turf) <= megafauna_exclusion_radius)
 					can_spawn = FALSE
 					break
+
 		else if (is_megafauna)
 			// Megafauna can spawn wherever it wants as long as its not next to another mega
 			for(var/turf/spawn_turf as anything in spawn_data[CAVE_SPAWN_MEGAFAUNA])
@@ -195,12 +200,11 @@
 		if (!can_spawn)
 			continue
 
-		if (ispath(picked_mob, /obj/structure/spawner/lavaland))
+		if (ispath(picked_mob, /mob/living/basic/mining/tendril))
 			spawn_data[CAVE_SPAWN_TENDRIL] += target_turf
-		else
-			if (is_megafauna)
-				spawn_data[CAVE_SPAWN_MEGAFAUNA] += target_turf
-			spawn_data[CAVE_SPAWN_MOB] += target_turf
+		else if (is_megafauna)
+			spawn_data[CAVE_SPAWN_MEGAFAUNA] += target_turf
+		spawn_data[CAVE_SPAWN_MOB] += target_turf
 
 		new picked_mob(target_turf)
 
diff --git a/code/datums/mapgen/biomes/lavaland.dm b/code/datums/mapgen/biomes/lavaland.dm
index 7461ef33d8a..88c907dc23f 100644
--- a/code/datums/mapgen/biomes/lavaland.dm
+++ b/code/datums/mapgen/biomes/lavaland.dm
@@ -1,6 +1,7 @@
 /datum/biome/lavaland
 	open_turf_type = /turf/open/misc/asteroid/basalt/lava_land_surface
 	closed_turf_type = /turf/closed/mineral/volcanic
+	mob_exclusion_radius = 7
 
 /datum/biome/lavaland/basalt
 	closed_turf_type = /turf/closed/mineral/random/volcanic
@@ -19,9 +20,7 @@
 		/mob/living/basic/mining/lobstrosity/lava = 20,
 		/obj/effect/spawner/random/lavaland_mob/raptor = 15,
 		/mob/living/basic/mining/goldgrub = 15,
-		/obj/structure/spawner/lavaland = 1,
-		/obj/structure/spawner/lavaland/goliath = 3,
-		/obj/structure/spawner/lavaland/legion = 3,
+		/mob/living/basic/mining/tendril = 7,
 	)
 
 	flora_types = list(
@@ -58,9 +57,7 @@
 		/mob/living/basic/mining/lobstrosity/lava = 40,
 		/obj/effect/spawner/random/lavaland_mob/raptor = 15,
 		/mob/living/basic/mining/goldgrub = 35,
-		/obj/structure/spawner/lavaland = 2,
-		/obj/structure/spawner/lavaland/goliath = 3,
-		/obj/structure/spawner/lavaland/legion = 3,
+		/mob/living/basic/mining/tendril = 8,
 	)
 
 	flora_types = list(
@@ -96,9 +93,7 @@
 		/mob/living/basic/mining/lobstrosity/lava = 25,
 		/obj/effect/spawner/random/lavaland_mob/raptor = 20,
 		/mob/living/basic/mining/goldgrub = 15,
-		/obj/structure/spawner/lavaland = 2,
-		/obj/structure/spawner/lavaland/goliath = 1,
-		/obj/structure/spawner/lavaland/legion = 3,
+		/mob/living/basic/mining/tendril = 6,
 	)
 
 	flora_types = list(
diff --git a/code/game/objects/structures/lavaland/necropolis_tendril.dm b/code/game/objects/structures/lavaland/necropolis_tendril.dm
deleted file mode 100644
index e6ca59016ed..00000000000
--- a/code/game/objects/structures/lavaland/necropolis_tendril.dm
+++ /dev/null
@@ -1,141 +0,0 @@
-//Necropolis Tendrils, which spawn lavaland monsters and break into a chasm when killed
-/obj/structure/spawner/lavaland
-	name = "necropolis tendril"
-	desc = "A vile tendril of corruption, originating deep underground. Terrible monsters are pouring out of it."
-
-	icon = 'icons/mob/simple/lavaland/nest.dmi'
-	icon_state = "tendril"
-
-	faction = list(FACTION_MINING, FACTION_ASHWALKER)
-	max_mobs = 3
-	max_integrity = 250
-	mob_types = list(/mob/living/basic/mining/watcher)
-
-	move_resist=INFINITY // just killing it tears a massive hole in the ground, let's not move it
-	anchored = TRUE
-	resistance_flags = FIRE_PROOF | LAVA_PROOF
-	var/obj/effect/light_emitter/tendril/emitted_light
-	scanner_taggable = TRUE
-	mob_gps_id = "WT"
-	spawner_gps_id = "Necropolis Tendril"
-
-/obj/structure/spawner/lavaland/goliath
-	mob_types = list(/mob/living/basic/mining/goliath)
-	mob_gps_id = "GL"
-
-/obj/structure/spawner/lavaland/legion
-	mob_types = list(/mob/living/basic/mining/legion/spawner_made)
-	mob_gps_id = "LG"
-
-/obj/structure/spawner/lavaland/icewatcher
-	mob_types = list(/mob/living/basic/mining/watcher/icewing)
-	mob_gps_id = "WT|I" // icewing
-
-GLOBAL_LIST_INIT(tendrils, list())
-/obj/structure/spawner/lavaland/Initialize(mapload)
-	. = ..()
-	emitted_light = new(loc)
-	for(var/F in RANGE_TURFS(1, src))
-		if(ismineralturf(F))
-			var/turf/closed/mineral/M = F
-			M.ScrapeAway(null, CHANGETURF_IGNORE_AIR)
-	AddComponent(/datum/component/gps, "Eerie Signal")
-	GLOB.tendrils += src
-
-/obj/structure/spawner/lavaland/atom_deconstruct(disassembled)
-	new /obj/effect/collapse(loc)
-
-/obj/structure/spawner/lavaland/examine(mob/user)
-	var/list/examine_messages = ..()
-	examine_messages += span_notice("Once this thing gets hurts enough, it triggers a violent final retaliation.")
-	examine_messages += span_notice("You'll only have a few moments to run up, grab some loot with an open hand, and get out with it.")
-	return examine_messages
-
-/obj/structure/spawner/lavaland/Destroy()
-	var/last_tendril = TRUE
-	if(GLOB.tendrils.len>1)
-		last_tendril = FALSE
-
-	if(last_tendril && !(flags_1 & ADMIN_SPAWNED_1))
-		if(SSachievements.achievements_enabled)
-			for(var/mob/living/L in view(7,src))
-				if(L.stat || !L.client)
-					continue
-				L.client.give_award(/datum/award/achievement/boss/tendril_exterminator, L)
-				L.client.give_award(/datum/award/score/tendril_score, L) //Progresses score by one
-	GLOB.tendrils -= src
-	QDEL_NULL(emitted_light)
-	return ..()
-
-/obj/effect/light_emitter/tendril
-	set_luminosity = 4
-	set_cap = 2.5
-	light_color = LIGHT_COLOR_LAVA
-
-/obj/effect/collapse
-	name = "collapsing necropolis tendril"
-	desc = "Get your loot and get clear!"
-	layer = TABLE_LAYER
-	icon = 'icons/mob/simple/lavaland/nest.dmi'
-	icon_state = "tendril"
-	anchored = TRUE
-	density = TRUE
-	/// weakref list of which mobs have gotten their loot from this effect.
-	var/list/collected = list()
-	/// a bit of light as to make less unfair deaths from the chasm
-	var/obj/effect/light_emitter/tendril/emitted_light
-
-/obj/effect/collapse/Initialize(mapload)
-	. = ..()
-	emitted_light = new(loc)
-	visible_message(span_bolddanger("The tendril writhes in fury as the earth around it begins to crack and break apart! Get back!"))
-	balloon_alert_to_viewers("interact to grab loot before collapse!", vision_distance = 7)
-	playsound(loc,'sound/effects/tendril_destroyed.ogg', 200, FALSE, 50, TRUE, TRUE)
-	addtimer(CALLBACK(src, PROC_REF(collapse)), 5 SECONDS)
-
-/obj/effect/collapse/examine(mob/user)
-	var/list/examine_messages = ..()
-	if(isliving(user))
-		if(has_collected(user))
-			examine_messages += span_boldnotice("You've grabbed what you can, now get out!")
-		else
-			examine_messages += span_boldnotice("You might have some time to grab some goodies with an open hand before it collapses!")
-	return examine_messages
-
-/obj/effect/collapse/attack_hand(mob/living/collector, list/modifiers)
-	. = ..()
-	if(has_collected(collector))
-		to_chat(collector, span_danger("You've already gotten some loot, just get out of there with it!"))
-		return
-	visible_message(span_warning("Something falls free of the tendril!"))
-	var/obj/structure/closet/crate/necropolis/tendril/loot = new /obj/structure/closet/crate/necropolis/tendril(loc)
-	collector.start_pulling(loot)
-	collected += WEAKREF(collector)
-
-/obj/effect/collapse/Destroy()
-	collected.Cut()
-	QDEL_NULL(emitted_light)
-	return ..()
-
-///Helper proc that resolves weakrefs to determine if collector is in collected list, returning a boolean.
-/obj/effect/collapse/proc/has_collected(mob/collector)
-	for(var/datum/weakref/weakref as anything in collected)
-		var/mob/living/resolved = weakref.resolve()
-		//it could have been collector, it could not have been, we don't care
-		if(!resolved)
-			continue
-		if(resolved == collector)
-			return TRUE
-	return FALSE
-
-/obj/effect/collapse/proc/collapse()
-	for(var/mob/M in range(7,src))
-		shake_camera(M, 15, 1)
-	playsound(get_turf(src),'sound/effects/explosion/explosionfar.ogg', 200, TRUE)
-	visible_message(span_bolddanger("The tendril falls inward, the ground around it widening into a yawning chasm!"))
-	for(var/turf/T in RANGE_TURFS(2,src))
-		if(HAS_TRAIT(T, TRAIT_NO_TERRAFORM))
-			continue
-		if(!T.density)
-			T.TerraformTurf(/turf/open/chasm/lavaland, /turf/open/chasm/lavaland, flags = CHANGETURF_INHERIT_AIR)
-	qdel(src)
diff --git a/code/modules/antagonists/changeling/powers/mutations.dm b/code/modules/antagonists/changeling/powers/mutations.dm
index 20c4b7e220d..3dc6e81a6ef 100644
--- a/code/modules/antagonists/changeling/powers/mutations.dm
+++ b/code/modules/antagonists/changeling/powers/mutations.dm
@@ -478,7 +478,7 @@
 	return BULLET_ACT_HIT
 
 /obj/projectile/tentacle/Destroy()
-	qdel(chain)
+	QDEL_NULL(chain)
 	source = null
 	return ..()
 
diff --git a/code/modules/clothing/suits/reactive_armour.dm b/code/modules/clothing/suits/reactive_armour.dm
index 2f524915820..a38ffbadce8 100644
--- a/code/modules/clothing/suits/reactive_armour.dm
+++ b/code/modules/clothing/suits/reactive_armour.dm
@@ -534,7 +534,7 @@
 	shock_turf_windup(owner.loc)
 
 /obj/item/clothing/suit/armor/reactive/weather/proc/shock_turf_windup(turf/target)
-	new /obj/effect/temp_visual/telegraphing/thunderbolt(target)
+	new /obj/effect/temp_visual/telegraphing/circle(target)
 	addtimer(CALLBACK(src, PROC_REF(shock_turf), target), 1 SECONDS)
 
 /obj/item/clothing/suit/armor/reactive/weather/proc/shock_turf(turf/target)
diff --git a/code/modules/mapfluff/ruins/objects_and_mobs/ash_walker_den.dm b/code/modules/mapfluff/ruins/objects_and_mobs/ash_walker_den.dm
index ce57035a766..b18e740f8cb 100644
--- a/code/modules/mapfluff/ruins/objects_and_mobs/ash_walker_den.dm
+++ b/code/modules/mapfluff/ruins/objects_and_mobs/ash_walker_den.dm
@@ -123,4 +123,77 @@
 	resistance_flags = FIRE_PROOF | LAVA_PROOF
 	max_integrity = 200
 
+/obj/effect/light_emitter/tendril
+	set_luminosity = 4
+	set_cap = 2.5
+	light_color = LIGHT_COLOR_LAVA
+
+/obj/effect/collapse
+	name = "collapsing necropolis tendril"
+	desc = "Get your loot and get clear!"
+	layer = TABLE_LAYER
+	icon = 'icons/mob/simple/lavaland/nest.dmi'
+	icon_state = "tendril"
+	anchored = TRUE
+	density = TRUE
+	/// weakref list of which mobs have gotten their loot from this effect.
+	var/list/collected = list()
+	/// a bit of light as to make less unfair deaths from the chasm
+	var/obj/effect/light_emitter/tendril/emitted_light
+
+/obj/effect/collapse/Initialize(mapload)
+	. = ..()
+	emitted_light = new(loc)
+	visible_message(span_bolddanger("The tendril writhes in fury as the earth around it begins to crack and break apart! Get back!"))
+	balloon_alert_to_viewers("interact to grab loot before collapse!", vision_distance = 7)
+	playsound(loc,'sound/effects/tendril_destroyed.ogg', 200, FALSE, 50, TRUE, TRUE)
+	addtimer(CALLBACK(src, PROC_REF(collapse)), 5 SECONDS)
+
+/obj/effect/collapse/examine(mob/user)
+	var/list/examine_messages = ..()
+	if(isliving(user))
+		if(has_collected(user))
+			examine_messages += span_boldnotice("You've grabbed what you can, now get out!")
+		else
+			examine_messages += span_boldnotice("You might have some time to grab some goodies with an open hand before it collapses!")
+	return examine_messages
+
+/obj/effect/collapse/attack_hand(mob/living/collector, list/modifiers)
+	. = ..()
+	if(has_collected(collector))
+		to_chat(collector, span_danger("You've already gotten some loot, just get out of there with it!"))
+		return
+	visible_message(span_warning("Something falls free of the tendril!"))
+	var/obj/structure/closet/crate/necropolis/tendril/loot = new /obj/structure/closet/crate/necropolis/tendril(loc)
+	collector.start_pulling(loot)
+	collected += WEAKREF(collector)
+
+/obj/effect/collapse/Destroy()
+	collected.Cut()
+	QDEL_NULL(emitted_light)
+	return ..()
+
+///Helper proc that resolves weakrefs to determine if collector is in collected list, returning a boolean.
+/obj/effect/collapse/proc/has_collected(mob/collector)
+	for(var/datum/weakref/weakref as anything in collected)
+		var/mob/living/resolved = weakref.resolve()
+		//it could have been collector, it could not have been, we don't care
+		if(!resolved)
+			continue
+		if(resolved == collector)
+			return TRUE
+	return FALSE
+
+/obj/effect/collapse/proc/collapse()
+	for(var/mob/viewer in range(7, src))
+		shake_camera(viewer, 15, 1)
+	playsound(get_turf(src),'sound/effects/explosion/explosionfar.ogg', 200, TRUE)
+	visible_message(span_bolddanger("The tendril falls inward, the ground around it widening into a yawning chasm!"))
+	for(var/turf/ground in RANGE_TURFS(2, src))
+		if(HAS_TRAIT(ground, TRAIT_NO_TERRAFORM))
+			continue
+		if(!ground.density)
+			ground.TerraformTurf(/turf/open/chasm/lavaland, /turf/open/chasm/lavaland, flags = CHANGETURF_INHERIT_AIR)
+	qdel(src)
+
 #undef ASH_WALKER_SPAWN_THRESHOLD
diff --git a/code/modules/mining/equipment/kinetic_crusher/kinetic_crusher.dm b/code/modules/mining/equipment/kinetic_crusher/kinetic_crusher.dm
index bb07998534c..9f72047fcde 100644
--- a/code/modules/mining/equipment/kinetic_crusher/kinetic_crusher.dm
+++ b/code/modules/mining/equipment/kinetic_crusher/kinetic_crusher.dm
@@ -218,7 +218,7 @@
 	var/backstabbed = FALSE
 	var/def_check = target.getarmor(type = BOMB)
 	// Backstab bonus
-	if(check_behind(user, target) || boosted_mark)
+	if(check_behind(user, target) && !HAS_TRAIT(target, TRAIT_BACKSTAB_IMMUNE) || boosted_mark)
 		backstabbed = TRUE
 		combined_damage += backstab_bonus
 		playsound(user, backstab_sound, 100, TRUE) //Seriously who spelled it wrong
diff --git a/code/modules/mining/equipment/monster_organs/rush_gland.dm b/code/modules/mining/equipment/monster_organs/rush_gland.dm
index 69c79974170..f22bf029a8c 100644
--- a/code/modules/mining/equipment/monster_organs/rush_gland.dm
+++ b/code/modules/mining/equipment/monster_organs/rush_gland.dm
@@ -24,6 +24,7 @@
 /obj/item/organ/monster_core/rush_gland/on_mob_insert(mob/living/carbon/organ_owner)
 	. = ..()
 	RegisterSignal(organ_owner, COMSIG_GOLIATH_TENTACLED_GRABBED, PROC_REF(trigger_organ_action_on_sig))
+	RegisterSignal(organ_owner, COMSIG_TENDRIL_TENTACLED_GRABBED, PROC_REF(trigger_organ_action_on_sig))
 
 /obj/item/organ/monster_core/rush_gland/on_mob_remove(mob/living/carbon/organ_owner, special, movement_flags)
 	. = ..()
diff --git a/code/modules/mining/lavaland/mining_loot/megafauna/legion.dm b/code/modules/mining/lavaland/mining_loot/megafauna/legion.dm
index cb8fa553271..4ec0dbfe49e 100644
--- a/code/modules/mining/lavaland/mining_loot/megafauna/legion.dm
+++ b/code/modules/mining/lavaland/mining_loot/megafauna/legion.dm
@@ -95,7 +95,7 @@
 	playsound(src, 'sound/effects/magic/lightningshock.ogg', 10, TRUE, extrarange = SILENCED_SOUND_EXTRARANGE, falloff_distance = 0)
 	targeted_turfs += target_turf
 	balloon_alert(user, "you aim at [target_turf]...")
-	new /obj/effect/temp_visual/telegraphing/thunderbolt(target_turf)
+	new /obj/effect/temp_visual/telegraphing/circle(target_turf)
 	addtimer(CALLBACK(src, PROC_REF(throw_thunderbolt), target_turf, power_boosted), 1.5 SECONDS)
 	thunder_charges--
 	addtimer(CALLBACK(src, PROC_REF(recharge)), thunder_charge_time)
diff --git a/code/modules/mob/living/basic/lavaland/tendril/tendril.dm b/code/modules/mob/living/basic/lavaland/tendril/tendril.dm
new file mode 100644
index 00000000000..b31e8a982a7
--- /dev/null
+++ b/code/modules/mob/living/basic/lavaland/tendril/tendril.dm
@@ -0,0 +1,155 @@
+#define HEARTBEAT_NORMAL (1.8 SECONDS)
+#define HEARTBEAT_FAST (1 SECONDS)
+#define HEARTBEAT_FRANTIC (0.4 SECONDS)
+
+GLOBAL_LIST_INIT(tendrils, list())
+
+/mob/living/basic/mining/tendril
+	name = "necropolis tendril"
+	desc = "A vile tendril of corruption, originating deep underground."
+	icon = 'icons/mob/simple/lavaland/tendril.dmi'
+	icon_state = "tendril"
+	icon_living = "tendril"
+	pixel_w = -8
+	base_pixel_w = -8
+	status_flags = NONE
+	mob_biotypes = MOB_ORGANIC | MOB_SKELETAL | MOB_MINING
+	basic_mob_flags = DEL_ON_DEATH | IMMUNE_TO_FISTS
+	mob_size = MOB_SIZE_HUGE
+	maxHealth = 1200
+	health = 1200
+
+	friendly_verb_continuous = "flails at"
+	friendly_verb_simple = "flail at"
+	speak_emote = list("resonates")
+	obj_damage = 100
+	melee_damage_lower = 20
+	melee_damage_upper = 20
+	sharpness = SHARP_POINTY
+	wound_bonus = CANT_WOUND
+	attack_sound = 'sound/items/weapons/pierce.ogg'
+	attack_verb_continuous = "pierces through"
+	attack_verb_simple = "pierce through"
+	throw_blocked_message = "does nothing to the thick shell of"
+	move_resist = INFINITY
+
+	light_range = 3
+	light_power = 2
+	light_color = LIGHT_COLOR_LAVA
+
+	ai_controller = /datum/ai_controller/basic_controller/tendril
+
+	/// Looping heartbeat sound
+	var/datum/looping_sound/heartbeat/soundloop
+	/// Melee attack ability to used in retaliation to melee strikes and whenever it manages to grab someone
+	var/datum/action/cooldown/mob_cooldown/projectile_attack/tendril_melee/tendril_melee
+
+/mob/living/basic/mining/tendril/Initialize(mapload)
+	. = ..()
+	GLOB.tendrils += src
+	AddElement(/datum/element/ai_retaliate)
+	AddElement(/datum/element/death_drops, /obj/structure/closet/crate/necropolis/tendril)
+	AddComponent(/datum/component/ai_target_timer)
+	AddComponent(/datum/component/gps, "Eerie Signal")
+	AddComponent(/datum/component/basic_mob_attack_telegraph, display_telegraph_overlay = FALSE, telegraph_duration = 0.4 SECONDS)
+	AddComponent(/datum/component/regenerator, regeneration_delay = 30 SECONDS, brute_per_second = 20)
+	add_traits(list(TRAIT_BACKSTAB_IMMUNE, TRAIT_IMMOBILIZED), INNATE_TRAIT)
+
+	var/static/list/abilities = list(
+		/datum/action/cooldown/mob_cooldown/projectile_attack/tendril_lash = BB_TENDRIL_LASH,
+		/datum/action/cooldown/mob_cooldown/tendril_chaser = BB_TENDRIL_CHASER,
+		/datum/action/cooldown/mob_cooldown/tendril_cross_spikes = BB_TENDRIL_SPIKES,
+	)
+	grant_actions_by_list(abilities)
+
+	tendril_melee = new(src)
+	tendril_melee.Grant(src)
+	AddComponent(/datum/component/revenge_ability, tendril_melee, targeting = GET_TARGETING_STRATEGY(ai_controller.blackboard[BB_TARGETING_STRATEGY]), max_range = 2, target_self = TRUE)
+
+	soundloop = new(src, start_immediately = FALSE)
+	soundloop.mid_length = HEARTBEAT_NORMAL
+	soundloop.pressure_affected = FALSE
+	soundloop.start()
+	update_appearance(UPDATE_OVERLAYS)
+
+	var/turf/our_turf = get_turf(src)
+	for (var/turf/rock in range(4, src))
+		var/dist = sqrt((rock.x - our_turf.x) ** 2 + (rock.y - our_turf.y) ** 2)
+		if (dist > 4.5)
+			continue
+
+		if (ismineralturf(rock))
+			rock.ScrapeAway(null, CHANGETURF_IGNORE_AIR)
+
+		if (istype(rock, /turf/open/misc/asteroid) && prob(100 / sqrt(max(1, dist))))
+			rock.ChangeTurf(/turf/open/indestructible/necropolis, null, CHANGETURF_IGNORE_AIR)
+
+/mob/living/basic/mining/tendril/Destroy()
+	GLOB.tendrils -= src
+	QDEL_NULL(soundloop)
+
+	if(!SSachievements.achievements_enabled || (flags_1 & ADMIN_SPAWNED_1))
+		return ..()
+
+	for(var/mob/living/killer in view(7, src))
+		if(killer.stat || !killer.client)
+			continue
+		killer.client.give_award(/datum/award/score/tendril_score, killer)
+		if (!length(GLOB.tendrils))
+			killer.client.give_award(/datum/award/achievement/boss/tendril_exterminator, killer)
+
+	return ..()
+
+/mob/living/basic/mining/tendril/update_overlays()
+	. = ..()
+	. += emissive_appearance(icon, "[icon_state]_e", src, effect_type = EMISSIVE_NO_BLOOM)
+	. += emissive_appearance(icon, "[icon_state]_e_bloom", src, effect_type = EMISSIVE_BLOOM)
+
+/mob/living/basic/mining/tendril/Life(seconds_per_tick)
+	. = ..()
+	update_heartbeat() // Just a single math op unless we need updating so its fine to put it here
+
+/mob/living/basic/mining/tendril/updatehealth()
+	. = ..()
+	update_heartbeat()
+
+/mob/living/basic/mining/tendril/proc/update_heartbeat()
+	if (!soundloop)
+		return
+
+	var/beat_rate = HEARTBEAT_NORMAL
+	if (ai_controller?.blackboard[BB_BASIC_MOB_CURRENT_TARGET])
+		beat_rate = round(HEARTBEAT_FRANTIC + health / maxHealth * (HEARTBEAT_FAST - HEARTBEAT_FRANTIC), 0.05 SECONDS)
+
+	if (beat_rate != soundloop.mid_length)
+		soundloop.set_mid_length(beat_rate)
+
+/mob/living/basic/mining/tendril/do_attack_animation(atom/attacked_atom, visual_effect_icon, obj/item/used_item, no_effect, fov_effect = TRUE, item_animation_override = null)
+	if(!no_effect && (visual_effect_icon || used_item))
+		do_item_attack_animation(attacked_atom, visual_effect_icon, used_item, animation_type = item_animation_override)
+
+	// Stabby visuals
+	var/obj/effect/temp_visual/spike_stab/stab = new(get_turf(src))
+	var/target_dir = get_dir(src, attacked_atom)
+	stab.transform = matrix().Turn(dir2angle(target_dir) + rand(-7, 7))
+	if (target_dir & NORTH)
+		stab.pixel_z = 24
+	else if (target_dir & SOUTH)
+		stab.pixel_z = -24
+	if (target_dir & EAST)
+		stab.pixel_w = 24
+	else if (target_dir & WEST)
+		stab.pixel_w = -24
+
+/obj/effect/temp_visual/spike_stab
+	icon = 'icons/mob/simple/lavaland/lavaland_monsters.dmi'
+	icon_state = "spike_small"
+	duration = 0.4 SECONDS
+
+/mob/living/basic/mining/tendril/proc/snatch_react()
+	if (tendril_melee.IsAvailable())
+		tendril_melee.Activate(warning = FALSE)
+
+#undef HEARTBEAT_NORMAL
+#undef HEARTBEAT_FAST
+#undef HEARTBEAT_FRANTIC
diff --git a/code/modules/mob/living/basic/lavaland/tendril/tendril_actions.dm b/code/modules/mob/living/basic/lavaland/tendril/tendril_actions.dm
new file mode 100644
index 00000000000..ba4bb3b219d
--- /dev/null
+++ b/code/modules/mob/living/basic/lavaland/tendril/tendril_actions.dm
@@ -0,0 +1,358 @@
+/// Fires out two cross patterns of damaging tentacles which reel in anything they hit, then causes a followup attack
+/datum/action/cooldown/mob_cooldown/projectile_attack/tendril_lash
+	name = "Tentacle Lash"
+	desc = "Lash out with your tentacles in 8 directions, reeling in whatever you hit and unleashing a deadly followup attack afterwards."
+	button_icon = 'icons/mob/simple/lavaland/lavaland_monsters.dmi'
+	button_icon_state = "goliath_tentacle_wiggle"
+	background_icon_state = "bg_demon"
+	overlay_icon_state = "bg_demon_border"
+	click_to_activate = FALSE
+	cooldown_time = 8 SECONDS
+	melee_cooldown_time = 0
+	shared_cooldown = NONE
+	projectile_type = /obj/projectile/tentacle_lash
+
+/datum/action/cooldown/mob_cooldown/projectile_attack/tendril_lash/Activate(atom/target)
+	disable_cooldown_actions()
+
+	for (var/swipe_dir in GLOB.cardinals)
+		var/turf/open/line_turf = get_step(owner, swipe_dir)
+		for (var/i in 1 to projectile_type::range)
+			if (!istype(line_turf) || line_turf.is_blocked_turf(exclude_mobs = TRUE))
+				break
+			var/obj/effect/temp_visual/telegraphing/line/telegraph = new(line_turf)
+			telegraph.dir = swipe_dir
+			line_turf = get_step(line_turf, swipe_dir)
+
+	SLEEP_CHECK_DEATH(0.8 SECONDS, owner)
+
+	for (var/swipe_dir in GLOB.cardinals)
+		shoot_projectile(get_turf(owner), get_step(owner, swipe_dir), dir2angle(swipe_dir), owner)
+
+	SLEEP_CHECK_DEATH(1.6 SECONDS, owner)
+
+	for (var/swipe_dir in GLOB.diagonals)
+		var/turf/open/line_turf = get_step(owner, swipe_dir)
+		for (var/i in 1 to projectile_type::range)
+			if (!istype(line_turf) || line_turf.is_blocked_turf(exclude_mobs = TRUE))
+				break
+			var/obj/effect/temp_visual/telegraphing/line/telegraph = new(line_turf)
+			telegraph.dir = swipe_dir
+			line_turf = get_step(line_turf, swipe_dir)
+
+	SLEEP_CHECK_DEATH(0.8 SECONDS, owner)
+
+	for (var/swipe_dir in GLOB.diagonals)
+		shoot_projectile(get_turf(owner), get_step(owner, swipe_dir), dir2angle(swipe_dir), owner)
+
+	SLEEP_CHECK_DEATH(1.2 SECONDS, owner)
+	StartCooldown()
+	SLEEP_CHECK_DEATH(0.6 SECONDS, owner)
+	enable_cooldown_actions()
+	return TRUE
+
+/obj/projectile/tentacle_lash
+	name = "tentacle spike"
+	icon_state = "tentacle_spike"
+	pass_flags = PASSTABLE
+	damage = 5 // +10 from the grab
+	armor_flag = MELEE
+	range = 7
+	hit_prone_targets = TRUE
+	hitsound = 'sound/effects/wounds/pierce1.ogg'
+	sharpness = SHARP_POINTY
+	/// Beam connecting us and the firer
+	var/datum/beam/tentacle_beam = null
+	/// Does this projectile persist and reel in targets?
+	var/reel_in = TRUE
+	/// How long does the projectile persist?
+	var/duration = 1.2 SECONDS
+	/// Damage dealt to targets who get snatched from entering the beam or being hit directly
+	var/snatch_damage = 10
+
+/obj/projectile/tentacle_lash/stab
+	damage = 15
+	range = 2
+	duration = 0.2 SECONDS // Just for visual flair
+	reel_in = FALSE
+
+/obj/projectile/tentacle_lash/fire(fire_angle, atom/direct_target)
+	. = ..()
+	if (!firer)
+		return
+	tentacle_beam = Beam(firer, "goliath_tentacle", beam_type = (reel_in ? /obj/effect/ebeam/reacting : /obj/effect/ebeam), emissive = FALSE)
+	if (reel_in)
+		RegisterSignal(tentacle_beam, COMSIG_BEAM_ENTERED, PROC_REF(on_beam_entered))
+
+/obj/projectile/tentacle_lash/Destroy()
+	QDEL_NULL(tentacle_beam)
+	return ..()
+
+// Don't range out, stop and persist until we're done
+/obj/projectile/tentacle_lash/on_range()
+	STOP_PROCESSING(SSprojectiles, src)
+	// Reset to tile center
+	pixel_x = 0
+	pixel_y = 0
+	QDEL_IN(src, duration)
+
+/obj/projectile/tentacle_lash/prehit_pierce(atom/target)
+	// Ye 'ole colossus cheese
+	if (astype(target, /mob/living)?.stat == DEAD)
+		return PROJECTILE_PIERCE_PHASE
+	return ..()
+
+/obj/projectile/tentacle_lash/on_hit(atom/target, blocked, pierce_hit)
+	. = ..()
+	if (!reel_in || !isliving(target) || blocked >= 100 || pierce_hit || . != BULLET_ACT_HIT)
+		return
+	snatch_target(target)
+
+/obj/projectile/tentacle_lash/proc/on_beam_entered(datum/beam/source, obj/effect/ebeam/hit, atom/movable/entered)
+	SIGNAL_HANDLER
+
+	if (!reel_in || entered == firer || !isliving(entered))
+		return
+
+	var/mob/living/victim = entered
+	if ((!firer || !firer.faction_check_atom(victim)) && victim.stat != DEAD)
+		INVOKE_ASYNC(src, PROC_REF(snatch_target), entered)
+
+/obj/projectile/tentacle_lash/proc/snatch_target(mob/living/victim)
+	if (HAS_TRAIT(victim, TRAIT_TENTACLE_IMMUNE) || SEND_SIGNAL(victim, COMSIG_TENDRIL_TENTACLED_GRABBED) & COMPONENT_TENDRIL_CANCEL_TENTACLE_GRAB)
+		return
+
+	to_chat(victim, span_userdanger("You're snatched by [firer]'s tentacles!"))
+	victim.apply_damage(snatch_damage, BRUTE, BODY_ZONE_CHEST, wound_bonus = CANT_WOUND)
+	if (QDELETED(victim))
+		qdel(src)
+		return
+	var/snatch_callback = null
+	if (istype(firer, /mob/living/basic/mining/tendril))
+		var/mob/living/basic/mining/tendril/tendril = firer
+		snatch_callback = CALLBACK(tendril, TYPE_PROC_REF(/mob/living/basic/mining/tendril, snatch_react))
+	victim.throw_at(firer, initial(range), 1, firer, FALSE, gentle = TRUE, callback = snatch_callback)
+	playsound(victim, hitsound, 50, -3, pressure_affected = FALSE)
+	qdel(src)
+
+/// An ability which makes spikes come out of the ground towards your target
+/datum/action/cooldown/mob_cooldown/tendril_chaser
+	name = "Impaling Spikes"
+	desc = "Send a spiked subterranean tendril chasing after your target."
+	button_icon = 'icons/mob/simple/lavaland/lavaland_monsters.dmi'
+	button_icon_state = "spikes_stabbing"
+	background_icon_state = "bg_demon"
+	overlay_icon_state = "bg_demon_border"
+	cooldown_time = 8 SECONDS
+	click_to_activate = TRUE
+	shared_cooldown = NONE
+	/// Lazy list of references to spike trails
+	var/list/active_chasers
+	/// Health percentage threshold at which we send out wide charsers after the main target
+	var/wide_chaser_threshold = 0.7
+
+/datum/action/cooldown/mob_cooldown/tendril_chaser/Grant(mob/granted_to)
+	. = ..()
+	RegisterSignal(granted_to, COMSIG_MOB_ABILITY_STARTED, PROC_REF(on_ability_started))
+	RegisterSignal(granted_to, COMSIG_MOB_ABILITY_FINISHED, PROC_REF(on_ability_finished))
+
+// Clean up after ourselves
+/datum/action/cooldown/mob_cooldown/tendril_chaser/Remove(mob/removed_from)
+	UnregisterSignal(removed_from, list(COMSIG_MOB_ABILITY_STARTED, COMSIG_MOB_ABILITY_FINISHED))
+	QDEL_LIST(active_chasers)
+	return ..()
+
+/datum/action/cooldown/mob_cooldown/tendril_chaser/proc/on_ability_started(mob/living/owner, datum/action/cooldown/activated)
+	SIGNAL_HANDLER
+
+	// Delete all of our chasers when our owner triggers cross spikes as to not cause guaranteed damage
+	if (istype(activated, /datum/action/cooldown/mob_cooldown/tendril_cross_spikes))
+		QDEL_LIST(active_chasers)
+
+/datum/action/cooldown/mob_cooldown/tendril_chaser/proc/on_ability_finished(mob/living/owner, datum/action/cooldown/activated)
+	SIGNAL_HANDLER
+
+	if (istype(activated, /datum/action/cooldown/mob_cooldown/tendril_cross_spikes))
+		ResetCooldown()
+
+/datum/action/cooldown/mob_cooldown/tendril_chaser/Activate(atom/target)
+	. = ..()
+	var/primary_type = /obj/effect/temp_visual/effect_trail/tendril_chaser
+	if (isliving(owner))
+		var/mob/living/as_living = owner
+		if (as_living.health / as_living.maxHealth <= wide_chaser_threshold)
+			primary_type = /obj/effect/temp_visual/effect_trail/tendril_chaser/wide_area
+
+	var/obj/effect/temp_visual/effect_trail/tendril_chaser/chaser = new primary_type(get_turf(owner), target)
+	LAZYADD(active_chasers, WEAKREF(chaser))
+	RegisterSignal(chaser, COMSIG_QDELETING, PROC_REF(on_chaser_destroyed))
+	playsound(owner, 'sound/effects/magic/demon_attack1.ogg', vol = 100, vary = TRUE, pressure_affected = FALSE)
+
+/// Remove a spike trail from our list of active trails
+/datum/action/cooldown/mob_cooldown/tendril_chaser/proc/on_chaser_destroyed(atom/chaser)
+	SIGNAL_HANDLER
+	LAZYREMOVE(active_chasers, WEAKREF(chaser))
+
+/obj/effect/temp_visual/effect_trail/tendril_chaser
+	duration = 10 SECONDS
+	move_speed = 4
+	spawned_effect = /obj/effect/temp_visual/emerging_ground_spike/tendril
+	/// Do we spawn spikes around ourselves as well or only on our own turf?
+	var/area_spawn = FALSE
+
+/obj/effect/temp_visual/effect_trail/tendril_chaser/wide_area
+	area_spawn = TRUE
+
+/obj/effect/temp_visual/effect_trail/tendril_chaser/add_spawner()
+	return
+
+/obj/effect/temp_visual/effect_trail/tendril_chaser/Moved(atom/old_loc, movement_dir, forced, list/old_locs, momentum_change)
+	. = ..()
+	if (!area_spawn)
+		var/turf/spawn_turf = get_turf(src)
+		if (!(locate(/obj/effect/temp_visual/emerging_ground_spike/tendril) in spawn_turf) && isopenturf(spawn_turf))
+			new spawned_effect(spawn_turf)
+		return
+
+	for (var/spawn_dir in GLOB.cardinals)
+		if (spawn_dir & REVERSE_DIR(movement_dir))
+			continue
+		var/turf/spawn_loc = get_step(src, spawn_dir)
+		if (!(locate(/obj/effect/temp_visual/emerging_ground_spike/tendril) in spawn_loc) && isopenturf(spawn_loc))
+			new spawned_effect(spawn_loc)
+
+/obj/effect/temp_visual/emerging_ground_spike/tendril
+	icon = 'icons/mob/simple/lavaland/lavaland_monsters.dmi'
+	icon_state = "spikes_stabbing"
+	duration = 0.7 SECONDS
+	position_variance = 3
+	impale_damage = 10
+	damage_blacklist_typecache = list(
+		/mob/living/basic/mining/tendril,
+	)
+	impale_wound_bonus = CANT_WOUND
+	// Have we hit someone yet?
+	var/hit_loser = FALSE
+
+/obj/effect/temp_visual/emerging_ground_spike/tendril/single
+	icon_state = "spike"
+	duration = 1 SECONDS
+	harm_delay = 0.25 SECONDS
+	position_variance = 5
+
+/obj/effect/temp_visual/emerging_ground_spike/tendril/impale()
+	. = ..()
+	hit_loser |= .
+	RegisterSignal(loc, COMSIG_ATOM_ENTERED, PROC_REF(on_entered))
+
+/obj/effect/temp_visual/emerging_ground_spike/tendril/proc/on_entered(atom/source, atom/movable/arrived, atom/old_loc, list/atom/old_locs)
+	SIGNAL_HANDLER
+
+	if (!isliving(arrived))
+		return
+
+	if (harm_mob(arrived) && !hit_loser)
+		playsound(src, 'sound/items/weapons/slice.ogg', vol = 50, vary = TRUE, pressure_affected = FALSE)
+		hit_loser = TRUE
+
+/datum/action/cooldown/mob_cooldown/tendril_cross_spikes
+	name = "Cross Spikes"
+	desc = "Create a wave of spikes around yourself, impaling anyone caught in it."
+	button_icon = 'icons/mob/simple/lavaland/lavaland_monsters.dmi'
+	button_icon_state = "spike"
+	background_icon_state = "bg_demon"
+	overlay_icon_state = "bg_demon_border"
+	click_to_activate = FALSE
+	cooldown_time = 10 SECONDS
+	melee_cooldown_time = 0
+	shared_cooldown = NONE
+	/// Health threshold at which we reduce the amount of empty spots on the ground
+	var/health_threshold = 0.3
+
+/datum/action/cooldown/mob_cooldown/tendril_cross_spikes/Activate(atom/target)
+	disable_cooldown_actions()
+	spawn_spikes()
+	SLEEP_CHECK_DEATH(0.4 SECONDS, owner)
+	spawn_spikes(inverse = TRUE)
+	StartCooldown()
+	enable_cooldown_actions()
+	return TRUE
+
+/datum/action/cooldown/mob_cooldown/tendril_cross_spikes/proc/spawn_spikes(inverse = FALSE)
+	var/list/turf/spike_turfs = list()
+	var/turf/owner_turf = get_turf(owner)
+
+	var/reduced_spawns = FALSE
+	if (isliving(owner))
+		var/mob/living/as_living = owner
+		if (as_living.health / as_living.maxHealth <= health_threshold)
+			reduced_spawns = TRUE
+
+	for (var/turf/open/target_turf in oview(7, owner_turf))
+		if (sqrt((target_turf.x - owner_turf.x) ** 2 + (target_turf.y - owner_turf.y) ** 2) > 9.5) // big circle is a lie
+			continue
+
+		if (reduced_spawns)
+			if (abs(target_turf.x - owner_turf.x) % 2 == abs(target_turf.y - owner_turf.y + inverse) % 2)
+				new /obj/effect/temp_visual/telegraphing/circle/short(target_turf)
+				spike_turfs += target_turf
+			continue
+
+		var/row_diff = inverse ? abs(target_turf.x - owner_turf.x) : abs(target_turf.y - owner_turf.y)
+		var/column_diff = inverse ? abs(target_turf.y - owner_turf.y) : abs(target_turf.x - owner_turf.x)
+		var/row = floor((row_diff + 1) / 3)
+		if (row % 2 == 0)
+			if (row_diff - row * 3 == 0)
+				if (column_diff % 4 == 2)
+					continue
+			else
+				if (column_diff % 4 != 0)
+					continue
+		else
+			if (row_diff - row * 3 == 0)
+				if (column_diff % 4 == 0)
+					continue
+			else
+				if (column_diff % 4 != 2)
+					continue
+
+		new /obj/effect/temp_visual/telegraphing/circle/short(target_turf)
+		spike_turfs += target_turf
+
+	SLEEP_CHECK_DEATH(1 SECONDS, owner)
+
+	for (var/turf/open/to_spawn in spike_turfs)
+		new /obj/effect/temp_visual/emerging_ground_spike/tendril/single(to_spawn)
+
+	SLEEP_CHECK_DEATH(0.8 SECONDS, owner)
+
+/datum/action/cooldown/mob_cooldown/projectile_attack/tendril_melee
+	name = "Tentacle Stab"
+	desc = "Stab nearby hostiles with long tentacles."
+	button_icon = 'icons/mob/simple/lavaland/lavaland_monsters.dmi'
+	button_icon_state = "goliath_tentacle_wiggle"
+	background_icon_state = "bg_demon"
+	overlay_icon_state = "bg_demon_border"
+	click_to_activate = FALSE
+	cooldown_time = 4 SECONDS
+	melee_cooldown_time = 0
+	shared_cooldown = NONE
+	projectile_type = /obj/projectile/tentacle_lash/stab
+
+/datum/action/cooldown/mob_cooldown/projectile_attack/tendril_melee/Activate(atom/target_atom, warning = TRUE)
+	if (warning)
+		for (var/stab_dir in GLOB.alldirs)
+			var/turf/open/stab_turf = get_step(owner, stab_dir)
+			if (!istype(stab_turf))
+				continue
+			var/obj/effect/temp_visual/telegraphing/line/short/telegraph = new(stab_turf)
+			telegraph.dir = stab_dir
+
+		SLEEP_CHECK_DEATH(0.5 SECONDS, owner)
+
+	for (var/stab_dir in GLOB.alldirs)
+		shoot_projectile(get_turf(owner), get_step(owner, stab_dir), firer = owner)
+
+	SLEEP_CHECK_DEATH(0.5 SECONDS, owner)
+	StartCooldown()
+	return TRUE
diff --git a/code/modules/mob/living/basic/lavaland/tendril/tendril_ai.dm b/code/modules/mob/living/basic/lavaland/tendril/tendril_ai.dm
new file mode 100644
index 00000000000..77da7086dfa
--- /dev/null
+++ b/code/modules/mob/living/basic/lavaland/tendril/tendril_ai.dm
@@ -0,0 +1,35 @@
+/datum/ai_controller/basic_controller/tendril
+	blackboard = list(
+		BB_TARGETING_STRATEGY = /datum/targeting_strategy/basic,
+		BB_TARGET_MINIMUM_STAT = HARD_CRIT,
+	)
+
+	planning_subtrees = list(
+		/datum/ai_planning_subtree/call_reinforcements/mining,
+		/datum/ai_planning_subtree/target_retaliate/check_faction,
+		/datum/ai_planning_subtree/simple_find_target,
+		/datum/ai_planning_subtree/targeted_mob_ability/tendril_chaser,
+		/datum/ai_planning_subtree/use_mob_ability/tendril_spikes,
+		/datum/ai_planning_subtree/use_mob_ability/tendril_lash,
+	)
+
+/datum/ai_planning_subtree/targeted_mob_ability/tendril_chaser
+	ability_key = BB_TENDRIL_CHASER
+	operational_datums = list(/datum/component/ai_target_timer)
+	finish_planning = FALSE
+
+/datum/ai_planning_subtree/use_mob_ability/tendril_lash
+	ability_key = BB_TENDRIL_LASH
+
+/datum/ai_planning_subtree/use_mob_ability/tendril_lash/SelectBehaviors(datum/ai_controller/controller, seconds_per_tick)
+	if (!controller.blackboard[BB_BASIC_MOB_CURRENT_TARGET])
+		return FALSE
+	return ..()
+
+/datum/ai_planning_subtree/use_mob_ability/tendril_spikes
+	ability_key = BB_TENDRIL_SPIKES
+
+/datum/ai_planning_subtree/use_mob_ability/tendril_spikes/SelectBehaviors(datum/ai_controller/controller, seconds_per_tick)
+	if (!controller.blackboard[BB_BASIC_MOB_CURRENT_TARGET])
+		return FALSE
+	return ..()
diff --git a/code/modules/mob/living/basic/space_fauna/meteor_heart/chasing_spikes.dm b/code/modules/mob/living/basic/space_fauna/meteor_heart/chasing_spikes.dm
index b50b089b0ff..60288e9c5e7 100644
--- a/code/modules/mob/living/basic/space_fauna/meteor_heart/chasing_spikes.dm
+++ b/code/modules/mob/living/basic/space_fauna/meteor_heart/chasing_spikes.dm
@@ -45,6 +45,8 @@
 	var/position_variance = 8
 	/// Damage to deal on impale
 	var/impale_damage = 15
+	/// Wound bonus on impale
+	var/impale_wound_bonus = 0
 	/// Typecache of types of mobs not to damage
 	var/list/damage_blacklist_typecache = list(
 		/mob/living/basic/meteor_heart,
@@ -67,14 +69,22 @@
 /obj/effect/temp_visual/emerging_ground_spike/proc/impale()
 	if (!isturf(loc))
 		return
+
 	var/hit_someone = FALSE
 	for(var/mob/living/victim in loc)
-		if (is_type_in_typecache(victim, damage_blacklist_typecache))
-			continue
-		hit_someone = TRUE
-		var/target_zone = victim.resting ? BODY_ZONE_CHEST : pick_weight(standing_damage_zones)
-		victim.apply_damage(impale_damage, damagetype = BRUTE, def_zone = target_zone, sharpness = SHARP_POINTY)
+		if (harm_mob(victim))
+			hit_someone = TRUE
+
 	if (hit_someone)
 		playsound(src, 'sound/items/weapons/slice.ogg', vol = 50, vary = TRUE, pressure_affected = FALSE)
 	else
 		playsound(src, 'sound/misc/splort.ogg', vol = 25, vary = TRUE, pressure_affected = FALSE)
+	return hit_someone
+
+/obj/effect/temp_visual/emerging_ground_spike/proc/harm_mob(mob/living/victim)
+	if (is_type_in_typecache(victim, damage_blacklist_typecache))
+		return FALSE
+
+	var/target_zone = victim.resting ? BODY_ZONE_CHEST : pick_weight(standing_damage_zones)
+	victim.apply_damage(impale_damage, damagetype = BRUTE, def_zone = target_zone, wound_bonus = impale_wound_bonus, sharpness = SHARP_POINTY)
+	return TRUE
diff --git a/code/modules/procedural_mapping/mapGenerators/lavaland.dm b/code/modules/procedural_mapping/mapGenerators/lavaland.dm
index 5251f5e8435..b638e7908dd 100644
--- a/code/modules/procedural_mapping/mapGenerators/lavaland.dm
+++ b/code/modules/procedural_mapping/mapGenerators/lavaland.dm
@@ -18,9 +18,7 @@
 
 /datum/map_generator_module/splatter_layer/lavaland_tendrils
 	spawnableTurfs = list()
-	spawnableAtoms = list(/obj/structure/spawner/lavaland = 5,
-	/obj/structure/spawner/lavaland/legion = 5,
-	/obj/structure/spawner/lavaland/goliath = 5)
+	spawnableAtoms = list(/mob/living/basic/mining/tendril = 15)
 
 /datum/map_generator/lavaland/ground_only
 	modules = list(/datum/map_generator_module/bottom_layer/lavaland_default)
diff --git a/code/modules/projectiles/projectile.dm b/code/modules/projectiles/projectile.dm
index 3c695a10b73..d7aa59766b3 100644
--- a/code/modules/projectiles/projectile.dm
+++ b/code/modules/projectiles/projectile.dm
@@ -1251,8 +1251,8 @@
 	free_hitscan_forceMove = TRUE
 	forceMove(source_loc)
 	starting = source_loc
-	pixel_x = source.pixel_x
-	pixel_y = source.pixel_y
+	pixel_x = source.pixel_x - source.base_pixel_x
+	pixel_y = source.pixel_y - source.base_pixel_y
 	original = target
 
 	// Trim off excess pixel_x/y by converting them into turf offset
diff --git a/code/modules/research/anomaly/anomaly_core.dm b/code/modules/research/anomaly/anomaly_core.dm
index d9d15931c0f..54339a7aacf 100644
--- a/code/modules/research/anomaly/anomaly_core.dm
+++ b/code/modules/research/anomaly/anomaly_core.dm
@@ -206,7 +206,7 @@
 	if(!length(possible_targets))
 		return
 	var/turf/target = pick(possible_targets)
-	new /obj/effect/temp_visual/telegraphing/thunderbolt(target)
+	new /obj/effect/temp_visual/telegraphing/circle(target)
 	addtimer(CALLBACK(src, PROC_REF(strike), target), 1 SECONDS)
 
 /obj/item/assembly/signaler/anomaly/weather/proc/strike(turf/target)
diff --git a/icons/mob/simple/lavaland/lavaland_monsters.dmi b/icons/mob/simple/lavaland/lavaland_monsters.dmi
index 3f5eb9cbd3b..f338fab310a 100644
Binary files a/icons/mob/simple/lavaland/lavaland_monsters.dmi and b/icons/mob/simple/lavaland/lavaland_monsters.dmi differ
diff --git a/icons/mob/simple/lavaland/tendril.dmi b/icons/mob/simple/lavaland/tendril.dmi
new file mode 100644
index 00000000000..0bbd0ccbe21
Binary files /dev/null and b/icons/mob/simple/lavaland/tendril.dmi differ
diff --git a/icons/mob/telegraphing/telegraph.dmi b/icons/mob/telegraphing/telegraph.dmi
index 6afddd04b62..1483234c763 100644
Binary files a/icons/mob/telegraphing/telegraph.dmi and b/icons/mob/telegraphing/telegraph.dmi differ
diff --git a/icons/obj/weapons/guns/projectiles.dmi b/icons/obj/weapons/guns/projectiles.dmi
index 24aa777660d..19bdf00bac9 100644
Binary files a/icons/obj/weapons/guns/projectiles.dmi and b/icons/obj/weapons/guns/projectiles.dmi differ
diff --git a/tgstation.dme b/tgstation.dme
index e2ec6e08463..9d443c4f779 100644
--- a/tgstation.dme
+++ b/tgstation.dme
@@ -3083,7 +3083,6 @@
 #include "code\game\objects\structures\icemoon\cave_entrance.dm"
 #include "code\game\objects\structures\lavaland\geyser.dm"
 #include "code\game\objects\structures\lavaland\gulag_vent.dm"
-#include "code\game\objects\structures\lavaland\necropolis_tendril.dm"
 #include "code\game\objects\structures\lavaland\ore_vent.dm"
 #include "code\game\objects\structures\plaques\_plaques.dm"
 #include "code\game\objects\structures\plaques\static_plaques.dm"
@@ -5378,6 +5377,9 @@
 #include "code\modules\mob\living\basic\lavaland\raptor\raptor_egg.dm"
 #include "code\modules\mob\living\basic\lavaland\raptor\raptor_food_trough.dm"
 #include "code\modules\mob\living\basic\lavaland\raptor\raptor_inheritance.dm"
+#include "code\modules\mob\living\basic\lavaland\tendril\tendril.dm"
+#include "code\modules\mob\living\basic\lavaland\tendril\tendril_actions.dm"
+#include "code\modules\mob\living\basic\lavaland\tendril\tendril_ai.dm"
 #include "code\modules\mob\living\basic\lavaland\watcher\watcher.dm"
 #include "code\modules\mob\living\basic\lavaland\watcher\watcher_ai.dm"
 #include "code\modules\mob\living\basic\lavaland\watcher\watcher_gaze.dm"
diff --git a/tools/UpdatePaths/Scripts/96186_tendrils.txt b/tools/UpdatePaths/Scripts/96186_tendrils.txt
new file mode 100644
index 00000000000..eb2f45499c4
--- /dev/null
+++ b/tools/UpdatePaths/Scripts/96186_tendrils.txt
@@ -0,0 +1 @@
+/obj/structure/spawner/lavaland : /mob/living/basic/mining/tendril