Binding of Isaac: Rebirth Wiki
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BBF is a passive item.

Effects[ | ]

  • Spawns a familiar that flies around the room like a Boom FlyBoom Fly and explodes on contact with an enemy, (except in Repentance) dealing 60 damage to all enemies within its blast radius and 10 damage to the enemy it touched.
    • (in Repentance) Deals 100 damage to all enemies within its blast radius and 10 damage to the enemy it touched.
  • It will respawn 10 seconds after exploding, or upon entering a different room.
  • This item belongs to the BeelzebubBeelzebub set. Collecting three items from this set will transform Isaac into a giant humanoid fly.

Notes[ | ]

  • Most obtained bomb modifiers are applied to BBF as well.
  • The blast can damage Isaac as a normal bomb would.
  • For the first few moments after entering a room, the familiar will do contact damage instead of exploding. This means the familiar will not blow up in Isaac's face if there is an enemy right next to the familiar's starting point. However, it may kill enemies that explode on death.

Synergies[ | ]

  • Collectible BFFS! iconBFFS! / Collectible Hive Mind iconHive Mind: Doubles the contact damage to 20 and increases explosion damage by 25.
    • (in Repentance) Contact damage becomes 20 and explosion damage increases to 125.
  • Collectible Mr. Mega iconMr. Mega: The explosion damage increases by 50 points.

Interactions[ | ]

In-game Footage[ | ]

Trivia[ | ]

  • The item's name is a reference to the acronym BBW, which stands for "Big Beautiful Woman".

Bugs[ | ]

Bug Bug! (in Afterbirth † and Repentance) BBF sometimes does contact damage to certain enemies without exploding. [Check ingame]
Bug Bug! (in Repentance) BBF can get stuck in corners in The Beast fight.


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