The Chaotic Puffer is an enemy that spawns in the 4th layer of the Abyss. It slowly swims towards the player and inflicts the Brimstone Flames debuff on contact, while periodically puffing up every 5 seconds. While it is unable to damage the player while not puffed, if it hits the player or dies while puffed up, it creates a large brimstone explosion, which also hurts other enemies. It receives increased knockback upon being hit.
- The Chaotic Puffer slowly rotates clockwise when moving to the right, and counterclockwise when moving to the left. It spins when hit.