diff --git a/code/__DEFINES/components.dm b/code/__DEFINES/components.dm
index 1058587d..91cc89ce 100644
--- a/code/__DEFINES/components.dm
+++ b/code/__DEFINES/components.dm
@@ -103,5 +103,3 @@
   */
 #define ELEMENT_BESPOKE		(1 << 1)
 #define COMSIG_MOVABLE_UPDATE_GLIDE_SIZE "movable_glide_size"	//Called when the movable's glide size is updated: (new_glide_size)
-//Blood color
-#define COMSIG_BLOOD_COLOR "blood_DNA_to_color"	//RGB blood stuff
diff --git a/code/game/atoms.dm b/code/game/atoms.dm
index 3e7fc722..841b4816 100644
--- a/code/game/atoms.dm
+++ b/code/game/atoms.dm
@@ -510,9 +510,8 @@
 	return final_rgb
 
 /atom/proc/clean_blood()
-	if(islist(blood_DNA))
-		blood_DNA = null
-		return TRUE
+	. = blood_DNA? TRUE : FALSE
+	blood_DNA = null
 
 /atom/proc/wash_cream()
 	return TRUE
diff --git a/code/game/machinery/suit_storage_unit.dm b/code/game/machinery/suit_storage_unit.dm
index e4e19668..51970125 100644
--- a/code/game/machinery/suit_storage_unit.dm
+++ b/code/game/machinery/suit_storage_unit.dm
@@ -266,7 +266,7 @@
 			for(var/atom/movable/AM in things_to_clear) //Scorches away blood and forensic evidence, although the SSU itself is unaffected
 				SEND_SIGNAL(AM, COMSIG_COMPONENT_CLEAN_ACT, CLEAN_STRONG)
 				AM.clean_blood()
-				AM.fingerprints = list()
+				AM.fingerprints = null
 				var/datum/component/radioactive/contamination = AM.GetComponent(/datum/component/radioactive)
 				if(contamination)
 					qdel(contamination)
diff --git a/code/game/objects/effects/decals/cleanable/gibs.dm b/code/game/objects/effects/decals/cleanable/gibs.dm
index e5d38d3e..e02eb86b 100644
--- a/code/game/objects/effects/decals/cleanable/gibs.dm
+++ b/code/game/objects/effects/decals/cleanable/gibs.dm
@@ -5,6 +5,7 @@
 	layer = LOW_OBJ_LAYER
 	random_icon_states = list("gib1", "gib2", "gib3", "gib4", "gib5", "gib6")
 	mergeable_decal = FALSE
+	bloodiness = 0
 	var/body_colors = "#e3ba84"	//a default color just in case.
 	var/gibs_reagent_id = "liquidgibs"
 	var/gibs_bloodtype = "A+"
diff --git a/code/game/objects/effects/decals/cleanable/humans.dm b/code/game/objects/effects/decals/cleanable/humans.dm
index 80169778..ef9e1d1a 100644
--- a/code/game/objects/effects/decals/cleanable/humans.dm
+++ b/code/game/objects/effects/decals/cleanable/humans.dm
@@ -5,12 +5,12 @@
 	icon_state = "floor1"
 	random_icon_states = list("floor1", "floor2", "floor3", "floor4", "floor5", "floor6", "floor7")
 	blood_state = BLOOD_STATE_BLOOD
-	bloodiness = MAX_SHOE_BLOODINESS
+	bloodiness = BLOOD_AMOUNT_PER_DECAL
 	color = BLOOD_COLOR_HUMAN //default so we don't have white splotches everywhere.
 
 /obj/effect/decal/cleanable/blood/replace_decal(obj/effect/decal/cleanable/blood/C)
 	if (C.blood_DNA)
-		blood_DNA |= C.blood_DNA.Copy()
+		blood_DNA |= C.blood_DNA
 	update_icon()
 	..()
 
diff --git a/code/game/objects/items/stacks/stack.dm b/code/game/objects/items/stacks/stack.dm
index db4fea47..873cb7ba 100644
--- a/code/game/objects/items/stacks/stack.dm
+++ b/code/game/objects/items/stacks/stack.dm
@@ -390,10 +390,14 @@
 		. = ..()
 
 /obj/item/stack/proc/copy_evidences(obj/item/stack/from)
-	blood_DNA = from.blood_DNA
-	fingerprints  = from.fingerprints
-	fingerprintshidden  = from.fingerprintshidden
-	fingerprintslast  = from.fingerprintslast
+	if(from.blood_DNA)
+		blood_DNA = from.blood_DNA.Copy()
+	if(from.fingerprints)
+		fingerprints = from.fingerprints.Copy()
+	if(from.fingerprintshidden)
+		fingerprintshidden = from.fingerprintshidden.Copy()
+	if(from.fingerprintslast)
+		fingerprintslast = from.fingerprintslast
 	//TODO bloody overlay
 
 /obj/item/stack/microwave_act(obj/machinery/microwave/M)
@@ -437,4 +441,4 @@
 
 /datum/stack_recipe_list/New(title, recipes)
 	src.title = title
-	src.recipes = recipes
\ No newline at end of file
+	src.recipes = recipes
diff --git a/code/game/objects/items/storage/toolbox.dm b/code/game/objects/items/storage/toolbox.dm
index 8cdd4f08..55f5e061 100644
--- a/code/game/objects/items/storage/toolbox.dm
+++ b/code/game/objects/items/storage/toolbox.dm
@@ -34,7 +34,7 @@ GLOBAL_LIST_EMPTY(rubber_toolbox_icons)
 /obj/item/storage/toolbox/update_icon()
 	..()
 	cut_overlays()
-	if(blood_DNA && blood_DNA.len)
+	if(length(blood_DNA))
 		add_blood_overlay()
 	if(has_latches)
 		var/icon/I = icon('icons/obj/storage.dmi', latches)
diff --git a/code/modules/antagonists/cult/blood_magic.dm b/code/modules/antagonists/cult/blood_magic.dm
index b756265b..49fb6720 100644
--- a/code/modules/antagonists/cult/blood_magic.dm
+++ b/code/modules/antagonists/cult/blood_magic.dm
@@ -741,7 +741,7 @@
 	var/turf/T = get_turf(target)
 	if(T)
 		for(var/obj/effect/decal/cleanable/blood/B in view(T, 2))
-			if(B.blood_state == "blood")
+			if(B.blood_state == BLOOD_STATE_BLOOD)
 				if(B.bloodiness == 100) //Bonus for "pristine" bloodpools, also to prevent cheese with footprint spam
 					temp += 30
 				else
diff --git a/code/modules/antagonists/wizard/equipment/artefact.dm b/code/modules/antagonists/wizard/equipment/artefact.dm
index 98f95a7c..13a332de 100644
--- a/code/modules/antagonists/wizard/equipment/artefact.dm
+++ b/code/modules/antagonists/wizard/equipment/artefact.dm
@@ -255,7 +255,7 @@
 	lefthand_file = 'icons/mob/inhands/misc/devices_lefthand.dmi'
 	righthand_file = 'icons/mob/inhands/misc/devices_righthand.dmi'
 	var/mob/living/carbon/human/target = null
-	var/list/mob/living/carbon/human/possible = list()
+	var/list/mob/living/carbon/human/possible
 	var/obj/item/voodoo_link = null
 	var/cooldown_time = 30 //3s
 	var/cooldown = 0
@@ -293,7 +293,7 @@
 		user.unset_machine()
 
 /obj/item/voodoo/attack_self(mob/user)
-	if(!target && possible.len)
+	if(!target && length(possible))
 		target = input(user, "Select your victim!", "Voodoo") as null|anything in possible
 		return
 
@@ -333,12 +333,12 @@
 		cooldown = world.time + cooldown_time
 
 /obj/item/voodoo/proc/update_targets()
-	LAZYINITLIST(possible)
+	possible = null
 	if(!voodoo_link)
 		return
 	for(var/mob/living/carbon/human/H in GLOB.alive_mob_list)
 		if(md5(H.dna.uni_identity) in voodoo_link.fingerprints)
-			possible |= H
+			LAZYOR(possible, H)
 
 /obj/item/voodoo/proc/GiveHint(mob/victim,force=0)
 	if(prob(50) || force)
diff --git a/code/modules/detectivework/detective_work.dm b/code/modules/detectivework/detective_work.dm
index 0f3b6532..7ab5b2db 100644
--- a/code/modules/detectivework/detective_work.dm
+++ b/code/modules/detectivework/detective_work.dm
@@ -9,8 +9,7 @@
 	else if(M.bloody_hands > 1)
 		if(add_blood_DNA(M.blood_DNA, M.diseases))
 			M.bloody_hands--
-	if(!suit_fibers)
-		suit_fibers = list()
+	LAZYINITLIST(suit_fibers)
 	var/fibertext
 	var/item_multiplier = isitem(src)?1.2:1
 	if(M.wear_suit)
@@ -93,15 +92,10 @@
 		fingerprints[full_print] = full_print
 
 /atom/proc/transfer_fingerprints_to(atom/A)
-	// Make sure everything are lists.
-	LAZYINITLIST(A.fingerprints)
-	LAZYINITLIST(A.fingerprintshidden)
-	LAZYINITLIST(fingerprints)
-	LAZYINITLIST(fingerprintshidden)
-
-	// Transfer
 	if(fingerprints)
-		A.fingerprints |= fingerprints.Copy()            //detective
+		LAZYINITLIST(A.fingerprints)
+		A.fingerprints |= fingerprints            //detective
 	if(fingerprintshidden)
-		A.fingerprintshidden |= fingerprintshidden.Copy()    //admin
+		LAZYINITLIST(A.fingerprintshidden)
+		A.fingerprintshidden |= fingerprintshidden    //admin
 	A.fingerprintslast = fingerprintslast
diff --git a/code/modules/mob/living/blood.dm b/code/modules/mob/living/blood.dm
index 757aadae..051aea93 100644
--- a/code/modules/mob/living/blood.dm
+++ b/code/modules/mob/living/blood.dm
@@ -33,7 +33,7 @@
 		bleed_rate = 0
 		return
 
-	if(bleed_rate <= 0)
+	if(bleed_rate < 0)
 		bleed_rate = 0
 
 	if(bodytemperature >= TCRYO && !(HAS_TRAIT(src, TRAIT_NOCLONE))) //cryosleep or husked people do not pump the blood.
@@ -91,12 +91,12 @@
 
 			//We want an accurate reading of .len
 			listclearnulls(BP.embedded_objects)
-			temp_bleed += 0.5*BP.embedded_objects.len
+			temp_bleed += 0.5 * BP.embedded_objects.len
 
 			if(brutedamage >= 20)
 				temp_bleed += (brutedamage * 0.013)
 
-		bleed_rate = max(bleed_rate - 0.50, temp_bleed)//if no wounds, other bleed effects (heparin) naturally decreases
+		bleed_rate = max(bleed_rate - 0.5, temp_bleed)//if no wounds, other bleed effects (heparin) naturally decreases
 
 		if(bleed_rate && !bleedsuppress && !(HAS_TRAIT(src, TRAIT_FAKEDEATH)))
 			bleed(bleed_rate)
@@ -286,8 +286,7 @@
 				drop.update_icon()
 				return
 			else
-				temp_blood_DNA = list()
-				temp_blood_DNA |= drop.blood_DNA.Copy() //we transfer the dna from the drip to the splatter
+				temp_blood_DNA = drop.blood_DNA.Copy()		//transfer dna from drip to splatter.
 				qdel(drop)//the drip is replaced by a bigger splatter
 		else
 			drop = new(T, get_static_viruses())
diff --git a/code/modules/mob/living/carbon/carbon_defines.dm b/code/modules/mob/living/carbon/carbon_defines.dm
index 16a6b4ed..f5b00200 100644
--- a/code/modules/mob/living/carbon/carbon_defines.dm
+++ b/code/modules/mob/living/carbon/carbon_defines.dm
@@ -49,7 +49,6 @@
 	//Gets filled up in create_bodyparts()
 
 	var/list/hand_bodyparts = list() //a collection of arms (or actually whatever the fug /bodyparts you monsters use to wreck my systems)
-	var/list/leg_bodyparts = list()
 
 	var/icon_render_key = ""
 	var/static/list/limb_icon_cache = list()
diff --git a/code/modules/mob/living/carbon/damage_procs.dm b/code/modules/mob/living/carbon/damage_procs.dm
index a78f4574..343f22d7 100644
--- a/code/modules/mob/living/carbon/damage_procs.dm
+++ b/code/modules/mob/living/carbon/damage_procs.dm
@@ -85,7 +85,7 @@
 	if(!forced && HAS_TRAIT(src, TRAIT_TOXINLOVER)) //damage becomes healing and healing becomes damage
 		amount = -amount
 		if(amount > 0)
-			blood_volume -= 3*amount // x5 is too much, x3 should be still penalizing enough.
+			blood_volume -= 3 * amount		//5x was too much, this is punishing enough.
 		else
 			blood_volume -= amount
 	return ..()
diff --git a/code/modules/mob/living/carbon/human/human_movement.dm b/code/modules/mob/living/carbon/human/human_movement.dm
index c6fb6870..95f1a69c 100644
--- a/code/modules/mob/living/carbon/human/human_movement.dm
+++ b/code/modules/mob/living/carbon/human/human_movement.dm
@@ -59,7 +59,7 @@
 					var/obj/effect/decal/cleanable/blood/footprints/oldFP = locate(/obj/effect/decal/cleanable/blood/footprints) in T
 					if(oldFP && (oldFP.blood_state == S.blood_state && oldFP.color == bloodtype_to_color(S.last_bloodtype)))
 						return
-					S.bloody_shoes[S.blood_state] = max(0, S.bloody_shoes[S.blood_state]-BLOOD_LOSS_PER_STEP)
+					S.bloody_shoes[S.blood_state] = max(0, S.bloody_shoes[S.blood_state] - BLOOD_LOSS_PER_STEP)
 					var/obj/effect/decal/cleanable/blood/footprints/FP = new /obj/effect/decal/cleanable/blood/footprints(T)
 					FP.blood_state = S.blood_state
 					FP.entered_dirs |= dir
diff --git a/code/modules/mob/living/simple_animal/bot/mulebot.dm b/code/modules/mob/living/simple_animal/bot/mulebot.dm
index 8e512fa5..3601f1ca 100644
--- a/code/modules/mob/living/simple_animal/bot/mulebot.dm
+++ b/code/modules/mob/living/simple_animal/bot/mulebot.dm
@@ -474,7 +474,7 @@
 				if(isturf(next))
 					if(bloodiness)
 						var/obj/effect/decal/cleanable/blood/tracks/B = new(loc)
-						if(blood_DNA && blood_DNA.len)
+						if(length(blood_DNA))
 							B.blood_DNA |= blood_DNA.Copy()
 						var/newdir = get_dir(next, loc)
 						if(newdir == dir)
diff --git a/code/modules/reagents/chemistry/reagents/other_reagents.dm b/code/modules/reagents/chemistry/reagents/other_reagents.dm
index d1bca659..85f42356 100644
--- a/code/modules/reagents/chemistry/reagents/other_reagents.dm
+++ b/code/modules/reagents/chemistry/reagents/other_reagents.dm
@@ -1128,7 +1128,7 @@
 
 /datum/reagent/iron/on_mob_life(mob/living/carbon/C)
 	if(C.blood_volume < (BLOOD_VOLUME_NORMAL*C.blood_ratio))
-		C.blood_volume += 0.01 //we'll have synthetics from medbay.
+		C.blood_volume += 0.25
 	..()
 
 /datum/reagent/iron/reaction_mob(mob/living/M, method=TOUCH, reac_volume)
diff --git a/code/modules/surgery/bodyparts/bodyparts.dm b/code/modules/surgery/bodyparts/bodyparts.dm
index 29afcc8c..408133d2 100644
--- a/code/modules/surgery/bodyparts/bodyparts.dm
+++ b/code/modules/surgery/bodyparts/bodyparts.dm
@@ -774,8 +774,6 @@
 	px_y = 12
 	stam_heal_tick = 2
 	max_stamina_damage = 50
-	var/blood_state = BLOOD_STATE_NOT_BLOODY
-	var/list/bloody_legs = list(BLOOD_STATE_BLOOD = 0, BLOOD_STATE_OIL = 0, BLOOD_STATE_NOT_BLOODY = 0)
 
 /obj/item/bodypart/l_leg/is_disabled()
 	if(HAS_TRAIT(owner, TRAIT_PARALYSIS_L_LEG))
@@ -840,8 +838,6 @@
 	px_y = 12
 	max_stamina_damage = 50
 	stam_heal_tick = 2
-	var/blood_state = BLOOD_STATE_NOT_BLOODY
-	var/list/bloody_legs = list(BLOOD_STATE_BLOOD = 0, BLOOD_STATE_OIL = 0, BLOOD_STATE_NOT_BLOODY = 0)
 
 /obj/item/bodypart/r_leg/is_disabled()
 	if(HAS_TRAIT(owner, TRAIT_PARALYSIS_R_LEG))
diff --git a/code/modules/surgery/bodyparts/helpers.dm b/code/modules/surgery/bodyparts/helpers.dm
index c6e2da08..d33d0167 100644
--- a/code/modules/surgery/bodyparts/helpers.dm
+++ b/code/modules/surgery/bodyparts/helpers.dm
@@ -31,7 +31,7 @@
 	return FALSE
 
 /mob/living/carbon/alien/larva/has_left_hand()
-	return 1
+	return TRUE
 
 
 /mob/proc/has_right_hand(check_disabled = TRUE)
@@ -45,7 +45,7 @@
 	return FALSE
 
 /mob/living/carbon/alien/larva/has_right_hand()
-	return 1
+	return TRUE
 
 
 
diff --git a/code/modules/surgery/organs/heart.dm b/code/modules/surgery/organs/heart.dm
index 40e20d60..e84cd518 100644
--- a/code/modules/surgery/organs/heart.dm
+++ b/code/modules/surgery/organs/heart.dm
@@ -227,13 +227,6 @@ obj/item/organ/heart/cybernetic/upgraded/on_life()
 	icon_state = "heart-c"
 	organ_flags = ORGAN_SYNTHETIC
 
-/obj/item/organ/heart/ipc/emp_act()
-	. = ..()
-	if(. & EMP_PROTECT_SELF)
-		return
-	Stop()
-	addtimer(CALLBACK(src, .proc/Restart), 10)
-
 /obj/item/organ/heart/freedom
 	name = "heart of freedom"
 	desc = "This heart pumps with the passion to give... something freedom."
diff --git a/modular_citadel/code/modules/reagents/reagents/cit_reagents.dm b/modular_citadel/code/modules/reagents/reagents/cit_reagents.dm
index 164fa944..d9f2cdf0 100644
--- a/modular_citadel/code/modules/reagents/reagents/cit_reagents.dm
+++ b/modular_citadel/code/modules/reagents/reagents/cit_reagents.dm
@@ -2,7 +2,7 @@
 /datum/reagent/consumable/semen
 	name = "Semen"
 	id = "semen"
-	description = "Sperm from some animal. I bet you'll drink this out of a bucket someday."
+	description = "Sperm from some animal. Useless for anything but insemination, really."
 	taste_description = "something salty"
 	taste_mult = 2 //Not very overpowering flavor
 	data = list("donor"=null,"viruses"=null,"donor_DNA"=null,"blood_type"=null,"resistances"=null,"trace_chem"=null,"mind"=null,"ckey"=null,"gender"=null,"real_name"=null)
@@ -36,15 +36,15 @@
 	icon_state = "semen1"
 	random_icon_states = list("semen1", "semen2", "semen3", "semen4")
 
-/obj/effect/decal/cleanable/semen/New()
-	..()
-	dir = pick(1,2,4,8)
+/obj/effect/decal/cleanable/semen/Initialize(mapload)
+	. = ..()
+	dir = GLOB.cardinals
 	add_blood_DNA(list("Non-human DNA" = "A+"))
 
 /obj/effect/decal/cleanable/semen/replace_decal(obj/effect/decal/cleanable/semen/S)
 	if(S.blood_DNA)
-		blood_DNA |= S.blood_DNA.Copy()
-	..()
+		blood_DNA |= S.blood_DNA
+	return ..()
 
 /datum/reagent/consumable/femcum
 	name = "Female Ejaculate"
@@ -70,15 +70,15 @@
 	blood_state = null
 	bloodiness = null
 
-/obj/effect/decal/cleanable/femcum/New()
-	..()
-	dir = pick(1,2,4,8)
+/obj/effect/decal/cleanable/femcum/Initialize(mapload)
+	. = ..()
+	dir = GLOB.cardinals
 	add_blood_DNA(list("Non-human DNA" = "A+"))
 
 /obj/effect/decal/cleanable/femcum/replace_decal(obj/effect/decal/cleanable/femcum/F)
 	if(F.blood_DNA)
-		blood_DNA |= F.blood_DNA.Copy()
-	..()
+		blood_DNA |= F.blood_DNA
+	return ..()
 
 /datum/reagent/consumable/femcum/reaction_turf(turf/T, reac_volume)
 	if(!istype(T))