diff --git a/code/datums/quirks/neutral_quirks/evil.dm b/code/datums/quirks/neutral_quirks/evil.dm
index 75b87950a84..95ecdb6bb8c 100644
--- a/code/datums/quirks/neutral_quirks/evil.dm
+++ b/code/datums/quirks/neutral_quirks/evil.dm
@@ -15,28 +15,3 @@
 	var/evil_policy = get_policy("[type]") || "Please note that while you may be [LOWER_TEXT(name)], this does NOT give you any additional right to attack people or cause chaos."
 	// We shouldn't need this, but it prevents people using it as a dumb excuse in ahelps.
 	to_chat(quirk_holder, span_big(span_info(evil_policy)))
-	RegisterSignal(quirk_holder, COMSIG_LIVING_CHANGED_BLOOD_TYPE, PROC_REF(make_blood_evil))
-
-/datum/quirk/evil/add(client/client_source)
-	var/mob/living/carbon/human/human_holder = quirk_holder
-	if(!istype(human_holder))
-		return
-	make_blood_evil(human_quirk_holder = human_holder, new_blood_type = human_holder.dna.blood_type)
-
-/datum/quirk/evil/remove()
-	UnregisterSignal(quirk_holder, list(COMSIG_LIVING_CHANGED_BLOOD_TYPE))
-
-/// Get a dynamically generated blood type based off the mob's old blood type and make it 'evil'. Needs to happen whenever the blood type changes.
-/datum/quirk/evil/proc/make_blood_evil(mob/living/carbon/human/human_quirk_holder, datum/blood_type/new_blood_type, update_cached_blood_dna_info)
-	SIGNAL_HANDLER
-
-	// Try to find a corresponding evil blood type for this
-	var/datum/blood_type/evil_blood_type
-	evil_blood_type = get_blood_type("[new_blood_type.id]_but_evil")
-	if(isnull(evil_blood_type)) // this blood type doesn't exist yet in the global list, so make a new one
-		evil_blood_type = new /datum/blood_type/evil(new_blood_type, new_blood_type.compatible_types)
-		GLOB.blood_types[evil_blood_type.id] = evil_blood_type
-	human_quirk_holder.set_blood_type(evil_blood_type)
-
-	if(human_quirk_holder.dna.species.exotic_bloodtype)
-		human_quirk_holder.dna.species.exotic_bloodtype = evil_blood_type
diff --git a/code/modules/mob/living/blood_types.dm b/code/modules/mob/living/blood_types.dm
index 8b106020fb8..47303a9d559 100644
--- a/code/modules/mob/living/blood_types.dm
+++ b/code/modules/mob/living/blood_types.dm
@@ -229,20 +229,3 @@
 
 /datum/blood_type/random_chemical/type_key()
 	return reagent_type
-
-// Similar to the random reagents bloodtype, this one creates a 'but evil' bloodtype
-/datum/blood_type/evil
-	root_abstract_type = /datum/blood_type/evil
-
-/datum/blood_type/evil/New(datum/blood_type/real_blood_type, list/real_compatible_types)
-	src.name = real_blood_type.name
-	. = ..()
-	id = type_key()
-	src.color = BLOOD_COLOR_BLACK // why it gotta be black though
-	src.reagent_type = real_blood_type.reagent_type
-	src.restoration_chem = real_blood_type.reagent_type
-	src.compatible_types = LAZYCOPY(real_compatible_types)
-	src.root_abstract_type = null
-
-/datum/blood_type/evil/type_key()
-	return "[name]_but_evil"