In-game pickup line
“Reusable soul protection”
Mechanics
What Book of Revelations does
- Each use grants one Soul Heart; holding the book improves Devil or Angel Room chance.
- Using it before an eligible floor boss can replace that boss with a Horseman.
From the game files
Recharge
Standard recharge6 room clears
Standard room-clear recharge. Batteries and other effects can change how quickly it refills.
Achievement #7
How to unlock it
Defeat a Harbinger.
Unlocking an item and finding it during a run are separate steps.
Explore more unlocksIn a run
Practical note
Consider the boss substitution if you are hoping for a particular boss reward.
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.
