The Book of Belial

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Item icon
Item altar
 
 
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34
 
Character appearance
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3  rooms 3  rooms
 
Devil Room Devil Room
Library Library
Greed mode only Devil Room Devil Room
Greed mode only Library Library
Greed mode only Treasure Room Treasure Room
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Added in  Afterbirth(page 1, column 14, row 2)
Removed in Afterbirth(page 1, column 4, row 4)

Not to be confused with Satanic Bible Satanic BibleSatanic Bible Icon.png6 roomsUpon activation, Isaac gains a black heart..

The Book of Belial is an activated item.

Effect[edit | edit source]

  • Increases damage by 2 upon use for the current room.
  • Guarantees the Devil Room or Angel Room to spawn after killing a boss while holding it.
    • Added in  Afterbirth Increases the chance to open the Devil Room or Angel Room by 12.5% after killing a boss while holding it instead.
  • Added in Afterbirth † This item belongs to the BookwormBookworm App.png* Roughly 50% of the time, Isaac shoots an extra tear, like 20/20 20/2020 20 Rebirth Icon.pngGrants double shot.. set. Collecting three items from this set will transform Isaac into Bookworm.

Notes[edit | edit source]

  • Judas starts with this item by default.
  • The x1.5 damage multiplier does not stack with the x1.5 damage multiplier from Cricket's Head Cricket's HeadCricket's Head Rebirth Icon.pngIncreases damage by 0.5, and multiplies it by 1.5x. or Magic Mushroom Magic MushroomMagic Mushroom Icon.pngIncreases most stats, enlarges Isaac, grants a heart container and restores all health..
  • The Book of Belial cannot open Devil Rooms in The Basement I / The Cellar I, nor in Chapter 5 and beyond, even though they can reached by other means (through the Joker JokerJoker Icon.pngTeleports you to the Devil Room or Angel Room. playing card, for example).
  • Unlike Goat Head Goat HeadGoat Head Rebirth Icon.pngA Devil Room / Angel Room Door will always spawn after every boss fight, excluding the first floor and floors after Utero II/Womb II., picking up The Book of Belial after killing the boss won't open the Devil/Angel Room Door.
    • The Book of Belial increases the chance of a Devil/Angel Room Door to spawn, while Goat Head Goat HeadGoat Head Rebirth Icon.pngA Devil Room / Angel Room Door will always spawn after every boss fight, excluding the first floor and floors after Utero II/Womb II. forces open a door to said rooms permanently.
  • The damage bonus does not stack with multiple uses in a room, or with the tarot card XV - The Devil, which has the same effect.
  • Switching items breaks the bonus damage effect.

Synergies[edit | edit source]

  • Blood of the Martyr Blood of the MartyrBlood of the Martyr Icon.pngIncreases Damage by 1, and turns Isaac's tears into blood tears.: Causes The Book of Belial to apply a 1.5x damage multiplier on top of its normal effect.

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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