Rules Book is an unlockable active item in Benighted Soul, a mod for The Binding of Isaac.

Shows a fortune paper and triggers a random effect:
• Spawns a coin.
• Spawns a bomb.
• Spawns a paper trinket.
• Spawns a health-priced shop collectible.
• +15% angel chance.
• Gains X-Ray Vision effect.
• Game timer decreases by 10 minutes.

Defeat The Lamb on Hard Mode as Benighted Judas.

This item contributes towards the Bookworm transformation. Collecting 3 items from this set will make Isaac fire an extra tear 25% of the time.

Rules Book can be found in the following item pools:

The following tags are applied to this item:

The following special synergies and interactions for Rules Book have been documented.

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

• Download Benighted Soul from the Steam Workshop.