Indigestion

Indigestion is earned by completing the Boneyard with a Butcher cat. This unlocks the Indigestion passive ability, which causes your cat to fart and inflict Poison 3 on all adjacent units whenever you heal over your maximum HP. The upgraded version also applies Burn 3 alongside the Poison. This turns overhealing into an offensive area-of-effect tool, rewarding builds that stack healing effects or have consistent HP recovery. Position your Butcher in the middle of enemy clusters and let healing items or abilities do double duty as both survivability and damage. Works best in builds that frequently overheal through regeneration, lifesteal, or consumable items.