Book of Revelations

Item Icon
Pickup Quote	"Reusable soul protection"
Entity ID	5.100.78
Recharge Time	6 rooms
Item Pool	Angel Room Library Treasure Room Library Angel Room Treasure Room
Collection Grid	(page 1, column 5, row 8) (page 1, column 15, row 4)
Unlock Method	Defeat a Harbinger

The Book of Revelations is an unlockable activated item.

Effects

• Grants a soul heart upon activation.
• Increases chance for a Devil/Angel Room Door to open by 35% if held while killing the Boss of the floor.
  • Only increases the chance by 17.5%.
• If The Book of Revelations is used at least once in a map, there is a higher chance that a Harbinger will replace the normal level boss:

1. Famine in Basement / Cellar
2. Pestilence in Caves / Catacombs
3. War in Depths I / Necropolis I
4. Death or Conquest (if unlocked) in Womb I / Utero I

Notes

• Set bosses (Mom, Mom's Heart, It Lives, Isaac, ???, Satan and The Lamb) cannot be replaced by the Book of Revelations.
• Only the first Boss of an XL floor is affected.
• Book of Revelations won't replace the boss on double sized boss rooms, like Double Trouble rooms or if the boss is Mr. Fred.
  • Furthermore, if the Book of Revelations is used on Caves I with a Double Trouble room, Pestilence won't spawn there, neither on Caves II. It is wiser to not use it on this floor until you can see the Boss Room shape.
• If a Harbinger has already been fought in the current environment (e.g. if you activate the item in Basement II having fought Famine in Basement I) the boss will also not be replaced.
• Keeping The Book of Revelations until Chapter 4 (and more specifically, aquiring it on Chapter 1 by resetting the game until acquisition) is one of the methods to unlock achievements related to Super Meat Boy and Super Bandage Girl. Said method is explained in detail here.
• This item can replace the boss even after Isaac initiates a battle with a normal boss and then teleports out before the fight is completed.

Gallery

• 

  3DS The icon of Book Of Revelations as seen on the lower 3DS screen.

Trivia

• The Book of Revelation (note the lack of an "s") is the final book of the Bible. It depicts the apocalypse through a vision shown to John of Patmos and includes the Four Horsemen and themes of Hell, Satan, and The Lamb. This explains why using it causes the next boss to be a horseman, as well as why it increases the chances of a Devil Room.

Seeds

PC 3C6Z 880R (Treasure room adjacent to spawn)

PC 9867 22FF (Treasure room adjacent to spawn)

PC 42ZY EYNS (Treasure room adjacent to spawn)

PC 6A7C BBKN (Treasure room adjacent to spawn)

PC PS4 BQ7G DLKQ (Treasure room adjacent to spawn)

PS4 G98Z MNSS (Treasure room adjacent to spawn)

Vita RKV8 O883

3DS GKM3 XJJ0 (Treasure room adjacent to spawn)

Switch V10Q 3WX1 (Starting item as Eden)

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The Binding of Isaac: Rebirth
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