Binding of Isaac: Rebirth Wiki

Book of Revelations is an unlockable activated item.

Effects[ | ]

  • On use, gives one Soul HeartSoul Heart.
  • Increases chance for a Devil RoomDevil Room or Angel RoomAngel Room door to open if held while killing the final boss of the floor.
    • (in Rebirth) The chance is increased by 35%.
    • (except in Rebirth) The chance is increased by 17.5%.
  • If the Book of Revelations is used at least once on a floor, a Harbinger will replace the current floor's boss if possible.
    • (in Rebirth and Repentance) This will always happen as long as the floor's respective Harbinger has not been encountered, the boss has not been fought yet, and a Harbinger can appear on the floor normally.
    • (in Afterbirth and Afterbirth †) This has a high chance to happen but is not guaranteed.
  • (in Afterbirth † and Repentance) This item belongs to the BookwormBookworm set. Collecting three items from this set will transform Isaac into Bookworm.

Notes[ | ]

The Harbingers capable of appearing, and the floors they appear on, are as follows:

  1. Boss Famine ingameFamine in Chapter 1
  2. Boss Pestilence ingamePestilence in Chapter 2
  3. Boss War ingameWar in Chapter 3, floor 1
  4. Boss Death ingameDeath or Boss Conquest ingameConquest (if unlocked) in Chapter 4, floor 1
  5. Boss Headless Horseman ingameHeadless Horseman on any floor in Chapters 1-4
  • Set bosses ( Boss Mom ingameMom, Boss Isaac ingameIsaac, Boss The Lamb ingameThe Lamb, etc.) are unaffected by Book of Revelations.
  • Only the first boss of a floor affected by Curse of the LabyrinthCurse of the Labyrinth is affected.
  • Book of Revelations won't replace the boss on double-sized Boss RoomBoss Rooms, like Double Trouble rooms or if the boss is Boss Mr. Fred ingameMr. Fred.
    • Furthermore, if the Book of Revelations is used on the first floor of a Chapter with a Double Trouble room no Harbinger will spawn on the second floor, even if Book of Revelations is used again. If finding a Harbinger is desired, Isaac should wait until seeing the shape of the Boss Room before using it.
  • Keeping Book of Revelations until Chapter 4 is one of the methods to unlock achievements related to Super Meat Boy and Super Bandage Girl, explained in detail here.
  • (in Rebirth and Afterbirth) 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.
  • (in Afterbirth † and Repentance) This item can replace Boss The Bloat ingameThe Bloat with a Harbinger in Aprils Fool (challenge #32).
  • (in Repentance) Bosses in DownpourDownpour / MinesMines / MausoleumMausoleum and their variants cannot be replaced with Harbingers.

Synergies[ | ]

  • (in Repentance)Collectible Book of Virtues iconBook of Virtues: Creates wisps in the inner ring, resembling tiny crosses that do not fire tears. The wisps create a Harbinger that spawns Locusts (the same ones that Collectible 7 Seals icon7 Seals creates) for the current room when destroyed.
  • (in Repentance)Collectible Converter iconConverter: Allows for generation of Heart Containers. ((in Repentance)Collectible Schoolbag iconSchoolbag required)
  • (except in Rebirth)Collectible Car Battery iconCar Battery: Gives Isaac two soul hearts.
  • (in Repentance)Collectible There's Options iconThere's Options: Defeating a Boss after using the book at least once in the floor will spawn both a regular Boss pool item and either Collectible Ball of Bandages iconBall of Bandages or Collectible Cube of Meat iconCube of Meat.
  • (in Repentance)Collectible Dream Catcher iconDream Catcher: If the floor boss is revealed to be one of the horsemen, book of revelations can be used early as the downside is no longer relevant.

Interactions[ | ]

In-game Footage[ | ]

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 Harbinger, as well as why it increases the chances of a Devil RoomDevil Room / Angel RoomAngel Room to appear.

Gallery[ | ]