Binding of Isaac: Rebirth Wiki
Binding of Isaac: Rebirth Wiki

Added in Afterbirth †

Slipped Rib is an unlockable passive item added in Booster Pack #5.


  • Spawns a bone familiar that circles around Isaac and reflects enemy shots.
    • The reflected projectiles deal 5 damage if they would've hurt Isaac for half a heart, and 10 for a full heart. Enemy damage modification from item effects or by stage does not affect this.
    • The familiar does not deal contact damage, but will kill the same types of flies on contact as Pretty Fly orbitals do.


  • Added in Repentance Despite being an orbital familiar, it is not in the list of items which Tainted Lost Tainted Lost cannot find in regular item pools.


  • BFFS! BFFS!: Does not increase the reflected damage.

In-game Footage[]


  • This item is a reference to slipping rib syndrome.
  • This item may be a reference to the Adam and Eve story in Genesis, where God takes a rib from Adam's body to create Eve.
  • This item may be a reference to the NES game Castlevania 2: Simon's Quest, where Dracula's rib is an item used as a shield that protects from projectiles.
  • This item is Edmund's favorite Booster Pack item according to _Kilburn.