Cat patially, MK partially.

code/modules/mob/living/simple_animal/friendly/cat.dm

@@ -310,6 +310,7 @@
 	emote_see = list("looks at you eagerly for pets!", "wiggles enthusiastically.")
 	gold_core_spawnable = NO_SPAWN
 	var/pseudo_death = FALSE
+	var/mob/living/carbon/human/origin
 
 /mob/living/simple_animal/pet/cat/custom_cat/death()
 	if (pseudo_death == TRUE) //secret cat chem

modular_citadel/code/modules/reagents/chemistry/reagents/MKUltra.dm

@@ -130,11 +130,11 @@ Creating a chem with a low purity will make you permanently fall in love with so
 */
 
 /datum/reagent/fermi/enthrall
-	name = "MKUltra"
-	id = "enthrall"
-	description = "A forbidden deep red mixture that overwhelms a foreign body with waves of pleasure, intoxicating them into servitude. When taken by the creator, it will enhance the draw of their voice to those affected by it."
-	color = "#660015" // rgb: , 0, 255
-	taste_description = "synthetic chocolate, a base tone of alcohol, and high notes of roses"
+	name = "Politi-aid"
+	id = "politi-aid"
+	description = "A forbidden deep purple mixture that aids the political influence of creator upon the subject. When taken by the creator, it will enhance the power of their words to those affected by it."
+	color = "#660055"
+	taste_description = "politics"
 	overdose_threshold = 100 //If this is too easy to get 100u of this, then double it please.
 	DoNotSplit = TRUE
 	metabolization_rate = 0.1//It has to be slow, so there's time for the effect.
@@ -170,6 +170,22 @@ Creating a chem with a low purity will make you permanently fall in love with so
 	creatorName = data.["creatorName"]
 	creator = get_mob_by_key(creatorID)
 
+/datum/reagent/fermi/enthrall/mkultra
+	name = "MKUltra"
+	id = "enthrall"
+	description = "A forbidden deep red mixture that overwhelms a foreign body with waves of pleasure, intoxicating them into servitude. When taken by the creator, it will enhance the draw of their voice to those affected by it."
+	color = "#660015" // rgb: , 0, 255
+	taste_description = "synthetic chocolate, a base tone of alcohol, and high notes of roses"
+
+
+/datum/reagent/fermi/enthrall/mkultra/on_mob_add(mob/living/carbon/M)
+	if(M.client?.prefs.lewdchem)
+		..()
+
+/datum/reagent/fermi/enthrall/on_mob_life(mob/living/carbon/M)
+	if(M.client?.prefs.lewdchem)
+		..()
+
 /datum/reagent/fermi/enthrall/on_mob_add(mob/living/carbon/M)
 	. = ..()
 	if(!ishuman(M))//Just to make sure screwy stuff doesn't happen.

modular_citadel/code/modules/reagents/chemistry/reagents/fermi_reagents.dm

@@ -6,12 +6,15 @@
 	id = "fermi"
 	taste_description	= "affection and love!"
 	can_synth = FALSE
+	var/cached_purity = 1
 
 //This should process fermichems to find out how pure they are and what effect to do.
 /datum/reagent/fermi/on_mob_add(mob/living/carbon/M, amount)
 	. = ..()
 	if(!M)
 		return
+	if(cached_purity == 1)
+		cached_purity = purity
 	if(purity < 0)
 		CRASH("Purity below 0 for chem: [id], Please let Fermis Know!")
 	if (purity == 1 || DoNotSplit == TRUE)
@@ -35,6 +38,8 @@
 	. = ..()
 	if(!ishuman(M))
 		return
+	if(cached_purity == 1)
+		cached_purity = purity
 	if (purity < 0)
 		CRASH("Purity below 0 for chem: [id], Please let Fermis Know!")
 	if (purity == 1 || DoNotSplit == TRUE)
@@ -99,9 +104,9 @@
 		return ..()
 	var/hatArmor = 0
 	if(!overdosed)
-		hatArmor = (purity/10)
+		hatArmor = (cached_purity/10)
 	else
-		hatArmor = - (purity/10)
+		hatArmor = - (cached_purity/10)
 	if(hatArmor > 90)
 		return ..()
 	var/obj/item/W = M.head
@@ -205,7 +210,7 @@
 	GET_COMPONENT_FROM(N, /datum/component/nanites, C)
 	if(isnull(N))
 		return ..()
-	N.nanite_volume = -purity//0.5 seems to be the default to me, so it'll neuter them.
+	N.nanite_volume = -cached_purity//0.5 seems to be the default to me, so it'll neuter them.
 	..()
 
 /datum/reagent/fermi/nanite_b_gone/overdose_process(mob/living/carbon/C)
@@ -307,15 +312,15 @@
 	else
 		holder.remove_reagent("fermiTest", volume)//Avoiding recurrsion
 	var/location = get_turf(holder.my_atom)
-	if(purity < 0.34 || purity == 1)
+	if(cached_purity < 0.34 || cached_purity == 1)
 		var/datum/effect_system/foam_spread/s = new()
 		s.set_up(volume*2, location, holder)
 		s.start()
-	if((purity < 0.67 && purity >= 0.34)|| purity == 1)
+	if((cached_purity < 0.67 && cached_purity >= 0.34)|| cached_purity == 1)
 		var/datum/effect_system/smoke_spread/chem/s = new()
 		s.set_up(holder, volume*2, location)
 		s.start()
-	if(purity >= 0.67)
+	if(cached_purity >= 0.67)
 		for (var/datum/reagent/reagent in holder.reagent_list)
 			if (istype(reagent, /datum/reagent/fermi))
 				var/datum/chemical_reaction/fermi/Ferm  = GLOB.chemical_reagents_list[reagent.id]
@@ -390,10 +395,11 @@
 /datum/reagent/fermi/secretcatchem //Should I hide this from code divers? A secret cit chem?
 	name = "secretcatchem" //an attempt at hiding it
 	id = "secretcatchem"
-	description = "An illegal and hidden chem that turns people into cats. It's said that it's so rare and unstable that having it means you've been blessed."
+	description = "An illegal and hidden chem that turns people into cats. It's said that it's so rare and unstable that having it means you've been blessed. If used on someone in crit, it will turn them into a cat permanently, until the cat is killed."
 	taste_description = "hairballs and cream"
 	color = "#ffc224"
 	var/catshift = FALSE
+	var/perma = FALSE
 	var/mob/living/simple_animal/pet/cat/custom_cat/catto = null
 	can_synth = FALSE
 
@@ -402,7 +408,7 @@
 
 /datum/reagent/fermi/secretcatchem/on_mob_add(mob/living/carbon/human/H)
 	. = ..()
-	if(purity >= 0.8)//ONLY if purity is high, and given the stuff is random. It's very unlikely to get this to 1. It already requires felind too, so no new functionality there.
+	if(cached_purity >= 0.9)//ONLY if purity is high, and given the stuff is random. It's very unlikely to get this to 1.
 		//exception(al) handler:
 		H.dna.features["ears"]  = "Cat"
 		H.dna.features["mam_ears"] = "Cat"
@@ -419,20 +425,29 @@
 	H.forceMove(catto)
 	log_game("FERMICHEM: [H] ckey: [H.key] has been made into a cute catto.")
 	SSblackbox.record_feedback("tally", "fermi_chem", 1, "cats")
-	//Just to deal with rascally ghosts
-	//ADD_TRAIT(catto, TRAIT_NODEATH, "catto")//doesn't work
-	//catto.health = 1000 //To simulate fake death, while preventing ghosts escaping.
+	if(H.InCritical())
+		perma = TRUE
+		volume = 10
+		metabolization_rate = 0
+		H.stat = DEAD
+		catto.origin = H
 
 /datum/reagent/fermi/secretcatchem/on_mob_life(mob/living/carbon/H)
 	if(catto.health <= 0) //So the dead can't ghost
 		if(prob(10))
-			to_chat(H, "<span class='notice'>You feel your body start to slowly shift back from it's dead form.</span>")
+			to_chat(catto, "<span class='notice'>You feel your body start to slowly shift back from it's dead form.</span>")
+		perma = FALSE
+		metabolization_rate = 1
 	else if(prob(5))
 		playsound(get_turf(catto), 'modular_citadel/sound/voice/merowr.ogg', 50, 1, -1)
 		catto.say("lets out a meowrowr!*")
 	..()
 
 /datum/reagent/fermi/secretcatchem/on_mob_delete(mob/living/carbon/H)
+	if(perma)
+
+		//to_chat(H, "<span class='notice'>You feel your body settle into it's new form. You won't be able to shift back on death anymore.</span>")
+		return
 	var/words = "Your body shifts back to normal."
 	H.forceMove(catto.loc)
 	catto.mind.transfer_to(H)

modular_citadel/code/modules/reagents/chemistry/reagents/healing.dm

@@ -57,9 +57,20 @@
 			to_chat(C, "<span class='notice'>You feel your lungs reform in your chest.</span>")
 			holder.remove_reagent(src.id, "10")
 
-
 	..()
 
+/datum/reagent/fermi/yamerol/reaction_mob(var/mob/living/L)
+	if(istype(L, /mob/living/simple_animal/pet/cat/custom_cat) && cached_purity == 1)
+		var/mob/living/simple_animal/pet/cat/custom_cat/catto = L
+		if(catto.origin)
+			var/mob/living/carbon/human/H = catto.origin
+			H.stat = CONSCIOUS
+			log_game("FERMICHEM: [catto] ckey: [catto.key] has returned to normal from Yamerol.")
+			to_chat(catto, "<span class='notice'>Your body shifts back to normal from the Yamerol.</span>")
+			H.forceMove(catto.loc)
+			catto.mind.transfer_to(H)
+			qdel(L)
+
 /datum/reagent/fermi/yamerol_tox
 	name = "Yamerol"
 	id = "yamerol_tox"