Gasbag

Gasbags are a unique enemy type found only in Corpse. While they are alive, they emit a ring of toxic gas that deals damage to Isaac if he stands in it for too long. Additionally, Gasbags will occasionally spawn a chain of 4 Army Flies to chase Isaac. Gasbags will only spawn flies if there are less than 8 army flies in the room, no matter how many Gasbags there are. The Gasbag's toxic cloud disappears a short time after it dies.

• The Gasbag first appeared in the Antibirth mod where it acted identical but could not spawn flies. The Binding of Isaac: Rebirth
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