The Book of Belial

A gray book with an inverted pentagram on its cover.

Effects

Upon activation, blood will run from Isaac's (now empty) eye sockets, and will also have a red Cross of St. Peter on his forehead. This adds 2 points of Damage for the current room.

In addition to its +2 base damage modifier, if Isaac holds Blood Of The Martyr (without also having Max's Head or Magic Mushroom), the book gives a 1.5x damage multiplier.

Increases the chance of a Devil Room spawning by 25%.

Notes

• Judas starts the game with this item.

Gallery

Synergies

• As with most Activated Items, items such as Habit, 9 Volt and The Battery decrease the charge time, increasing the effectiveness of this item. 
• This item's effect works with tear-changing effects such as Mutant Spider, The Inner Eye, Technology, Technology 2, Mom's Knife and Brimstone.
• Blood Of The Martyr - Damage is multiplied by 1.5 in addition to the normal +2 if Isaac possesses this item without also having Max's Head or Magic Mushroom.

Trivia

• In the Dead Sea Scrolls, (not to be confused with the item of the same name) Belial is the leader of the Sons of Darkness.
• During development, there was an item known as Satanic Bible. It later evolved into the Book Of Belial.
  • The Book of Belial is the third book of The Satanic Bible, and describes magic rituals.
• XV The Devil shares its effect with this item and does not stack with the Book of Belial.
• The upside down pentagram on the book is a widely known satanic ritual symbol.