Added The Nibble mutation

Added The Nibble (fatfang in the code) mutationan action that lets characters touch others to "bite" them, injecting a small amount of lipoifier

GainStation13/code/datums/mutations/fatfang.dm

@@ -0,0 +1,53 @@
+/datum/mutation/human/fatfang
+	name = "The Nibble"
+	desc = "A rare mutation that grows a pair of fangs in the user's mouth that inject a chemical that develops the target's adipose tissue."
+	quality = POSITIVE
+	text_gain_indication = "<span class='notice'>You feel something growing in your mouth!</span>"
+	text_lose_indication = "<span class='notice'>You feel your fangs shrink away.</span>"
+	difficulty = 8
+	power = /obj/effect/proc_holder/spell/targeted/touch/fatfang
+	instability = 10
+	energy_coeff = 1
+
+/obj/effect/proc_holder/spell/targeted/touch/fatfang
+	name = "The Nibble"
+	desc = "Draw out fangs that inject fattening venom"
+	drawmessage = "You draw out your fangs."
+	dropmessage = "You retract your fangs."
+	hand_path = /obj/item/melee/touch_attack/fatfang
+	action_icon = 'icons/mob/actions/bloodsucker.dmi'
+	action_icon_state = "power_feed"
+	charge_max = 50
+	clothes_req = FALSE
+
+/obj/item/melee/touch_attack/fatfang
+	name = "\improper fattening fangs"
+	desc = "Fangs armed with a venom most ample."
+	catchphrase = null
+	icon = 'icons/mob/actions/bloodsucker.dmi'
+	icon_state = "power_feed"
+	///How much weight is added?
+	var/chem_to_add = 5
+	///What verb is used for the spell?
+
+/obj/item/melee/touch_attack/fatfang/afterattack(atom/target, mob/living/carbon/user, proximity)
+	if(!proximity || !iscarbon(target) || target == user)
+		return FALSE
+	
+	if(!target || !chem_to_add)
+		return FALSE
+	
+	target.reagents.add_reagent(/datum/reagent/consumable/lipoifier, 5)
+
+	target.visible_message("<span class='danger'>[user] nibbles [target]!</span>","<span class='userdanger'>[user] nibbles you!</span>")
+	return ..()
+
+/obj/item/dnainjector/antifang
+	name = "\improper DNA injector (Anti-The Nibble)"
+	desc = "By the power of sugar, their fangs shall fall."
+	remove_mutations = list(FATFANG)
+
+/obj/item/dnainjector/fatfang
+	name = "\improper DNA injector (The Nibble)"
+	desc = "Give 'em just a teeny tiny bite."
+	add_mutations = list(FATFANG)

code/__DEFINES/DNA.dm

@@ -42,6 +42,7 @@
 #define ANTENNA		/datum/mutation/human/antenna
 #define PARANOIA	/datum/mutation/human/paranoia
 #define MINDREAD	/datum/mutation/human/mindreader
+#define FATFANG		/datum/mutation/human/fatfang
 
 #define UI_CHANGED "ui changed"
 #define UE_CHANGED "ue changed"

tgstation.dme

@@ -3075,6 +3075,7 @@
 #include "GainStation13\code\clothing\calorite_collar.dm"
 #include "GainStation13\code\clothing\haydee_suit.dm"
 #include "GainStation13\code\datums\components\fattening_door.dm"
+#include "GainStation13\code\datums\mutations\fatfang.dm"
 #include "GainStation13\code\datums\status_effects\fatstun.dm"
 #include "GainStation13\code\game\lore_papers.dm"
 #include "GainStation13\code\game\sound.dm"