Slipped Rib

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

Effects

 * 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.

Interactions

 * : Does not increase the reflected damage.

Trivia

 * 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.