In-game pickup line
“Mass room damage”
Mechanics
What The Necronomicon does
- Activation deals 40 damage to all enemies present.
- It is a single burst, so newly spawned enemies are not hit by that use.
From the game files
Recharge
Standard room-clear recharge. Batteries and other effects can change how quickly it refills.
Achievement #36
How to unlock it
Use the XIII - Death card four times.
Tarot Cloth can reduce the required XIII - Death uses to two.
Unlocking an item and finding it during a run are separate steps.
Explore more unlocksIn a run
Practical note
Use it after a wave has fully appeared to hit as many enemies as possible.
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.