it begins

code/modules/mining/lavaland/necropolis_chests.dm

@@ -957,7 +957,7 @@
 		if(1)
 			new /obj/item/mayhem(src)
 		if(2)
-			new /obj/item/blood_contract(src)
+			new /obj/item/gun/ballistic/revolver/doublebarrel/super(src)
 		if(3)
 			new /obj/item/gun/magic/staff/spellblade(src)
 
@@ -1028,6 +1028,17 @@
 	log_combat(user, L, "took out a blood contract on", src)
 	qdel(src)
 
+/obj/item/gun/ballistic/revolver/doublebarrel/super
+	name = "super combat shotgun"
+	desc = "From the belly of the beast - or rather, demon. Twice as lethal as a less-than-super shotgun, but a tad bulkier."
+	icon_state = "heckgun"
+	slot_flags = null
+	mag_type = /obj/item/ammo_box/magazine/internal/shot/dual/heck
+	burst_size = 2
+	burst_shot_delay = 0
+	unique_reskin = null
+	sawn_off = TRUE
+
 //Colossus
 /obj/structure/closet/crate/necropolis/colossus
 	name = "colossus chest"

code/modules/mob/living/simple_animal/hostile/megafauna/bubblegum.dm

@@ -17,7 +17,7 @@ From these blood pools Bubblegum may summon slaughterlings - weak, low-damage mi
 When Bubblegum dies, it leaves behind a H.E.C.K. suit+helmet as well as a chest that can contain three things:
  1. A spellblade that can slice off limbs at range
  2. A bottle that, when activated, drives everyone nearby into a frenzy
- 3. A contract that marks for death the chosen target
+ 3. A super double-barrel shotgun that shoots both shells at the same time.
 
 Difficulty: Hard
 

code/modules/projectiles/boxes_magazines/internal/shotgun.dm

@@ -37,6 +37,10 @@
 	name = "double-barrel shotgun internal magazine"
 	max_ammo = 2
 
+/obj/item/ammo_box/magazine/internal/shot/dual/heck
+	name = "heckgun internal magazine"
+	ammo_type = /obj/item/ammo_casing/shotgun/buckshot
+
 /obj/item/ammo_box/magazine/internal/shot/improvised
 	name = "improvised shotgun internal magazine"
 	ammo_type = /obj/item/ammo_casing/shotgun/improvised