Xenomorph Queens can now infest victims.

code/modules/hydroponics/seed_datums.dm

@@ -1113,14 +1113,15 @@
 	seed_name = "alien weed"
 	display_name = "alien weeds"
 	force_layer = 3
+	chems = list("phoron" = list(1,3))
 
 /datum/seed/xenomorph/New()
 	..()
 	set_trait(TRAIT_PLANT_ICON,"vine2")
 	set_trait(TRAIT_IMMUTABLE,1)
-	set_trait(TRAIT_PRODUCT_COLOUR,"#080006")
-	set_trait(TRAIT_FLESH_COLOUR,"#080006")
-	set_trait(TRAIT_PLANT_COLOUR,"#080006")
+	set_trait(TRAIT_PRODUCT_COLOUR,"#3D1934")
+	set_trait(TRAIT_FLESH_COLOUR,"#3D1934")
+	set_trait(TRAIT_PLANT_COLOUR,"#3D1934")
 	set_trait(TRAIT_PRODUCTION,1)
 	set_trait(TRAIT_YIELD,-1)
 	set_trait(TRAIT_SPREAD,2)

code/modules/hydroponics/spreading/spreading.dm

@@ -132,7 +132,7 @@
 		update_icon()
 		plant_controller.add_plant(src)
 		// Some plants eat through plating.
-		if(!isnull(seed.chems["pacid"]))
+		if(islist(seed.chems) && !isnull(seed.chems["pacid"]))
 			var/turf/T = get_turf(src)
 			T.ex_act(prob(80) ? 3 : 2)
 
@@ -190,7 +190,7 @@
 	if(growth>2 && growth == max_growth)
 		layer = (seed && seed.force_layer) ? seed.force_layer : 5
 		opacity = 1
-		if(!isnull(seed.chems["woodpulp"]))
+		if(islist(seed.chems) && !isnull(seed.chems["woodpulp"]))
 			density = 1
 	else
 		layer = (seed && seed.force_layer) ? seed.force_layer : 5

code/modules/mob/living/carbon/human/species/xenomorphs/alien_powers.dm

@@ -219,4 +219,46 @@
 			new /obj/structure/alien/resin/membrane(loc)
 		if("resin nest")
 			new /obj/structure/bed/nest(loc)
-	return
+	return
+
+mob/living/carbon/human/proc/xeno_infest(mob/living/carbon/human/M as mob in oview())
+	set name = "Infest (500)"
+	set desc = "Link a victim to the hivemind."
+	set category = "Abilities"
+
+	if(!M.Adjacent(src))
+		src << "<span class='warning'>They are too far away.</span>"
+		return
+
+	if(!M.mind)
+		src << "<span class='warning'>This mindless flesh adds nothing to the hive.</span>"
+		return
+
+	if(M.species.get_bodytype() == "Xenomorph" || !isnull(M.internal_organs_by_name["hive node"]))
+		src << "<span class='warning'>They are already part of the hive.</span>"
+		return
+
+	var/obj/item/organ/affecting = M.get_organ("chest")
+	if(!affecting || (affecting.status & ORGAN_ROBOT))
+		src << "<span class='warning'>This form is not compatible with our physiology.</span>"
+		return
+
+	src.visible_message("<span class='danger'>\The [src] crouches over \the [M], extending a hideous protuberance from its head!</span>")
+
+	if(!do_after(src, 150))
+		return
+
+	if(!check_alien_ability(500,1,"egg sac"))
+		return
+
+	if(!M.Adjacent(src))
+		src << "<span class='warning'>They are too far away.</span>"
+		return
+
+	if(!M || M.species.get_bodytype() == "Xenomorph" || !isnull(M.internal_organs_by_name["hive node"]) || !affecting || (affecting.status & ORGAN_ROBOT))
+		return
+
+	src.visible_message("<span class='danger'>\The [src] regurgitates something into \the [M]'s torso!</span>")
+	M << "<span class='danger'>A hideous lump of alien mass strains your ribcage as it settles within!</span>"
+	var/obj/item/organ/xenos/hivenode/node = new(affecting)
+	node.replaced(M,affecting)

code/modules/mob/living/carbon/human/species/xenomorphs/alien_species.dm

@@ -15,8 +15,8 @@
 
 	eyes = "blank_eyes"
 
-	brute_mod = 0.5 // Hardened carapace.
-	burn_mod = 2    // Weak to fire.
+	brute_mod = 0.25 // Hardened carapace.
+	burn_mod = 1.1    // Weak to fire.
 
 	warning_low_pressure = 50
 	hazard_low_pressure = -1
@@ -270,7 +270,8 @@
 		/mob/living/carbon/human/proc/transfer_plasma,
 		/mob/living/carbon/human/proc/corrosive_acid,
 		/mob/living/carbon/human/proc/neurotoxin,
-		/mob/living/carbon/human/proc/resin
+		/mob/living/carbon/human/proc/resin,
+		/mob/living/carbon/human/proc/xeno_infest
 		)
 
 /datum/species/xenos/queen/handle_login_special(var/mob/living/carbon/human/H)

code/modules/organs/subtypes/xenos.dm

@@ -38,15 +38,34 @@
 	icon_state = "xgibtorso"
 	organ_tag = "acid gland"
 
-/obj/item/organ/xenos/hivenode
-	name = "hive node"
-	parent_organ = "chest"
-	icon_state = "xgibmid2"
-	organ_tag = "hive node"
-
 /obj/item/organ/xenos/resinspinner
 	name = "resin spinner"
 	parent_organ = "head"
 	icon_state = "xgibmid2"
 	organ_tag = "resin spinner"
 
+/obj/item/organ/xenos/hivenode
+	name = "hive node"
+	parent_organ = "chest"
+	icon_state = "xgibmid2"
+	organ_tag = "hive node"
+
+/obj/item/organ/xenos/hivenode/removed(var/mob/living/user)
+	if(owner && ishuman(owner))
+		var/mob/living/carbon/human/H = owner
+		H << "<span class='alium'>You feel your connection to the hivemind fray and fade away...</span>"
+		H.remove_language("Hivemind")
+		if(H.mind && H.species.get_bodytype() != "Xenomorph")
+			xenomorphs.remove_antagonist(H.mind)
+	..(user)
+
+/obj/item/organ/xenos/hivenode/replaced(var/mob/living/carbon/human/target,var/obj/item/organ/external/affected)
+	..(target, affected)
+	if(owner && ishuman(owner))
+		var/mob/living/carbon/human/H = owner
+		H.add_language("Hivemind")
+		if(H.mind)
+			H << "<span class='alium'>You feel a sense of pressure as a vast intelligence meshes with your thoughts...</span>"
+			if(H.species.get_bodytype() != "Xenomorph" && xenomorphs.add_antagonist_mind(H.mind,1))
+				H << "Your will is ripped away as your humanity merges with the xenomorph hive. You are now a thrall to the queen and her brood. \
+				Obey their instructions without question. Serve the hive.</span>"