|Floors of Appearance|| Caves|
|Deals Contact Damage||Yes|
|Type of Tears||Explosion|
The Boom Fly is an enemy in The Binding of Isaac: Rebirth that is encountered on The Caves, The Catacombs, The Depths, and the Necropolis floors.
The Boom Fly flies diagonally around the room, bouncing off of the walls in the room, dealing contact damage. When killed, Boom Flies explode, possibly killing enemies, including other Boom Flies, sometimes causing chain reactions. The Boom Fly's explosion deals one Heart. Boom Flies are spawned by Loki. If the player has Skatole, Boom Flies still deal contact damage and explosive damage, the only thing changing being their speed, in which it is greatly lowered.