In-game pickup line
“Reusable evil... but at what cost?”
Mechanics
What Satanic Bible does
- Each use grants one Black Heart.
- Using it before the boss changes the boss item reward into a Devil Deal that must be paid for.
From the game files
Recharge
Standard recharge6 room clears
Standard room-clear recharge. Batteries and other effects can change how quickly it refills.
Achievement #126
How to unlock it
Defeat Isaac as Azazel.
Unlocking an item and finding it during a run are separate steps.
Explore more unlocksIn a run
Practical note
The health gain is useful, but plan for the price of the boss reward before using it on that floor.
Reference
Game data and sources
The item ID, quality and pool listings, 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. Charge and pickup values shown above also come from the extracted items.xml.
