Items in this pool can be found in the Library .
Activated Collectibles [ ]
Name
ID
Icon
Weight
Description
Anarchist Cookbook
5.100. 65
Spawns six Troll Bombs around the room .
The Bible
5.100. 33
Grants flight for the current room . Instantly kills Mom , Mom's Heart , and It Lives when activated, but kills Isaac when used on Satan .
The Book of Belial
5.100. 34
+2 damage for the current room . Passively guarantees a Devil Room or Angel Room will appear while held. +2 damage for the current room . Passively increases the chance of finding a Devil Room or Angel Room while held.
Book of Revelations
5.100. 78
Increases the chance of a Devil Room / Angel Room appearing while held. Upon use, gives one Soul Heart , and replaces the boss of the current floor with a Harbinger if possible.
Book of Secrets
5.100. 287
Gives the effect of Treasure Map , The Compass , or Blue Map for the duration of the current floor . If all effects are active, X-Ray Vision is provided for the floor instead. Highlights any Tinted Rocks and rocks with Crawl Space in the room.
Book of Shadows
5.100. 58
Creates a protective shield , nullifying all types of damage in the current room for 10 seconds.
The Book of Sin
5.100. 97
Spawns a random coin , heart , bomb , key , battery , pill or card near Isaac.
How to Jump
5.100. 282
Isaac jumps in the direction he is currently moving, allowing travel over obstacles and enemies .
The Necronomicon
5.100. 35
Deals 40 damage to every enemy in the room .
Satanic Bible
5.100. 292
Gives one Black Heart . Replaces the boss room item on the current floor with a Devil Deal .
Telepathy For Dummies
5.100. 192
Gives homing tears for the current room. Also gives +3 range .
Book of the Dead
5.100. 545
Creates a friendly Bony , Black Bony , or an orbital bone for each enemy killed in the current room. Creates a friendly Bony , Black Bony , Bone Fly , Revenant , or an orbital bone for each enemy killed in the current room.
Monster Manual
5.100. 123
Spawns a familiar from a specific selection for the current room . Spawns a familiar from a specific selection for the current floor .
Lemegeton
5.100. 712
Spawns a wisp representing a random passive item, which orbits Isaac but can be destroyed. While the wisp is alive, Isaac gains that item's effects. Generation uses the current room's item pool 25% of the time, otherwise a random pool.
Passive Collectibles [ ]
Name
ID
Icon
Weight
Description
Book of Virtues
5.100. 584
Spawns a destroyable orbiting wisp familiar that fires tears and deals contact damage. Also acts as a passive item that causes other active items to spawn themed wisps.