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▾Table of Contents▾
Book of the Dead item
Book of the Dead is an unlockable active item in The Binding of Isaac, added in the Afterbirth+ DLC.
Description
For each enemy killed in the current room, spawns either an orbital bone familiar (80% chance), or a friendly bone-themed enemy (20% chance).
The base bone-themed enemy is a Bony. It has a 25% chance of becoming a Black Bony instead.
The following enemies can also be spawned if they have been killed at least once on the save file: Big Bony (25%), Bone Fly (25%), and Revenant (1%).
The chances shown above are applied after a Bony or Black Bony has been selected, meaning they replace the Bony or Black Bony enemy.
Big Bonies can only spawn if the enemy killed has enough HP.
Revenants have an additional 8.33% chance of spawning while in Mausoleum, Gehenna, Sheol, or Dark Room.
Has a 1% chance of being dropped upon defeating The Forsaken.
Note
This page shows the latest information as of the new Repentance+ (Online Co-op) DLC.
To see information about this item for the previous Repentance version, check this page instead.
How to unlock?
Defeat Delirium as The Forgotten.
Transformations
Item pools
Book of the Dead can be found in the following item pools:
| Name | Weight |
|---|---|
| Treasure Room |
1.0/1.0
|
| Devil Room |
1.0/1.0
|
| Library |
1.0/1.0
|
| Greed Treasure Room |
1.0/1.0
|
| Greed Devil Room |
1.0/1.0
|
Tags
The following tags are applied to this item:
| Id | Description |
|---|---|
| book | Contributes towards the Bookworm transformation. |
| offensive | Can appear for  Tainted Lost. |
Special synergies
The following special synergies and interactions for Book of the Dead have been documented.
| Mod | Item | Synergy |
|---|---|---|
| --- | Book of Virtues | Spawns skull wisps in the inner ring that fire bones and spawn friendly Bonies when destroyed. Has a 33% chance to spawn a Black Bony instead of a regular one. |
| --- | Abyss | Spawns a light grey locust that has a chance to shoot 2-3 bone projectiles upon impact with an enemy. Each bone projectile deals damage equal to the locust's damage. |
* Note that not all possible synergies and interactions are listed here.
Internal item description
Below is the Internal Item Description as shown in-game.
Note that some stat changes are not displayed here. Please see the main description for the full effects.
Book of the Dead
• Spawns a bone orbital or charmed bony for each enemy killed in the current room
• Bone orbitals block enemy shots and deal contact damage but may break when doing either
• Abyss: x1 bone locust 1.5x Isaac's damage
• Book of Virtues: x1 outer wisp - 3 hp - 4 damage
• Book of Virtues: Spawns a friendly Bony when killed
External links
- Check out the item description on the external Isaac Wiki.
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