The Book of Belial

"Temporary DMG up"

Item ID
5.100.34
Character Appearance

Recharge Time

Collection Grid
(page 1, column 4, row 4)
(page 1, column 14, row 2)


Not to be confused with Satanic Bible.
The Book of Belial is an activated item.
Effects[edit | edit source]
- Gives +2 damage for the current room.
Guarantees the Devil Room or Angel Room to spawn after killing a boss while holding it.
Increases the chance to open the Devil Room or Angel Room by 12.5%.
This item belongs to the Bookworm set. Collecting three items from this set will transform Isaac into Bookworm.
Notes[edit | edit source]
- Judas starts with this item by default.
The damage bonus does not stack with multiple uses in the same room or with
XV - The Devil.
The damage bonus will stack with multiple uses in the same room and with
XV - The Devil.
- While activated, switching items will end the bonus damage effect.
- If the
Schoolbag and a second activated item are held, the book must be equipped in the primary slot to receive the Devil/Angel room bonus.
Only guarantees Devil/Angel Rooms on floors that they can normally appear on, and, unlike
Goat Head, picking up The Book of Belial after killing the boss will not open the Devil/Angel Room door.
Synergies[edit | edit source]
Blood of the Martyr: Causes The Book of Belial to apply a 1.5x damage multiplier on top of its normal effect. This multiplier cannot stack with multipliers from
Cricket's Head or
Magic Mushroom.
In-game Footage[edit | edit source]
Gallery[edit | edit source]
Trivia[edit | edit source]
- Can still open Angel Rooms even though it is a satanic book.
- It is one of the four books in the Satanic Bible.
- Belial is a name used for Satan in some Jewish and Christian texts.
Seeds[edit | edit source]
PC ZWQY MQ6C
Switch ZWC9 D2WY
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