The Binding of Isaac

The Binding of Isaac Wiki

Satanic Bible

Satanic Bible

Gives one Black Heart. Replaces the boss room item on the current floor with a Devil deal.


"Reusable Evil... But at what cost?"


  • Gives one Black Heart.
  • Once used, the boss room item pedestal for that floor will contain an item from the Devil Room item pool. These items must be paid for as a normal Devil Deal would.
  • This item belongs to the Bookworm set. Collecting three items from this set will transform Isaac into Bookworm.

Found in

  • Devil Room
  • Library
  • Treasure Room
  • Devil Room (Greed Mode)
  • Library (Greed Mode)
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