DIY Transformation Sting (#15821)

code/game/gamemodes/changeling/powers/tiny_prick.dm

@@ -94,7 +94,7 @@
 /datum/action/changeling/sting/transformation/can_sting(mob/user, mob/target)
 	if(!..())
 		return
-	if(HAS_TRAIT(target, TRAIT_HUSK) || (!ishuman(target)))
+	if(HAS_TRAIT(target, TRAIT_HUSK) || !ishuman(target) || (NOTRANSSTING in target.dna.species.species_traits))
 		to_chat(user, "<span class='warning'>Our sting appears ineffective against its DNA.</span>")
 		return FALSE
 	if(ishuman(target))

code/modules/reagents/chemistry/reagents/toxins.dm

@@ -203,6 +203,7 @@
 	reagent_state = LIQUID
 	color = "#7DFF00"
 	taste_description = "slime"
+	can_synth = FALSE
 
 /datum/reagent/stable_mutagen/on_new(data)
 	..()

code/modules/reagents/chemistry/recipes/toxins.dm

@@ -154,19 +154,6 @@
 	result_amount = 3
 	mix_message = "The substance turns neon green and bubbles unnervingly."
 
-/datum/chemical_reaction/stable_mutagen
-	name = "Stable mutagen"
-	id = "stable_mutagen"
-	result = "stable_mutagen"
-	required_reagents = list("mutagen" = 1, "lithium" = 1, "acetone" = 1, "bromine" = 1)
-	result_amount = 3
-	mix_message = "The substance turns a drab green and begins to bubble."
-
-/datum/chemical_reaction/stable_mutagen/stable_mutagen2
-	id = "stable_mutagen2"
-	required_reagents = list("mutadone" = 3, "lithium" = 1)
-	result_amount = 4
-
 /datum/chemical_reaction/rotatium
 	name = "Rotatium"
 	id = "Rotatium"