Gasper

Gasper is a flying poison-based enemy found in The End chapter. It has 17 HP and spreads poisonous gas clouds over the surrounding 4 tiles whenever it attacks or takes damage, making it hazardous to engage directly. It is immune to poison itself. Its most lethal moment is its death: when Gasper falls, it refills its health and primes an explosion for the following turn that detonates in a large poison cloud capable of destroying static objects.

The two-phase death means killing Gasper is only halfway done — you still have to survive or avoid the explosion on the following turn. The gas clouds it spreads during combat are flammable, so fire abilities can ignite them and deal environmental damage back into the arena. Every time Gasper takes a hit it also spreads new gas, meaning sustained multi-hit combos rapidly coat the battlefield in toxic tiles.

Fire-element attacks are the recommended approach — they damage Gasper, and if gas clouds are present, ignite them simultaneously. Ranged hit-and-run tactics minimize the time your cats spend adjacent to the gas tiles. After the killing blow, move all cats away from Gasper's position immediately to avoid the death explosion next turn. In The End chapter, Gaspers frequently appear in groups, so managing overlapping gas clouds requires constant repositioning.