Polished Bone is an unlockable trinket in The Binding of Isaac, added in the Repentance DLC.

Clearing a room has a small chance to spawn a friendly Bony.

This page shows information as of the latest Repentance release.
To see latest up-to date information about this trinket for the new Repentance+ (Online Co-op) DLC, check this page instead.

Defeat Isaac, ???, Satan, and The Lamb as Tainted Forgotten.

The following special synergies and interactions for Polished Bone have been documented.

* Note that not all possible synergies and interactions are listed here.

• Check out the trinket description on the external Isaac Wiki.