In-game pickup line
“Friends from beyond”
Mechanics
What Polished Bone does
- Completing a room can spawn an allied Bony enemy.
- The ally fights on Isaac's side as the run continues.
Achievement #576
How to unlock it
Earn the Isaac, ??? (Chest), Satan, and The Lamb completion marks as Tainted Forgotten.
Unlocking an item and finding it during a run are separate steps.
Explore more unlocksIn a run
Practical note
Keep it through several room clears to build a chance at extra support.
Reference
Game data and sources
The trinket ID, icon, game-file tags, and short pickup line come from the extracted Repentance files. This effect explanation is an editorial summary checked against the references below. Repentance+ can differ.
