Bone Heart is an unlockable pickup in The Binding of Isaac, added in the Afterbirth+ DLC.

Adds an empty bone heart container.

Bone hearts can be refilled with red hearts, and take 3 hits to deplete.

When depleted, bone hearts break and cannot be regenerated.

If obtained as a character that cannot have red health, the bone heart cannot be filled and will break in 1 hit.

This page shows the latest information as of the new Repentance+ (Online Co-op) DLC.
To see information about this pickup for the previous Repentance version, check this page instead.

Unlock The Forgotten.

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