Satanic Bible

Effects

Gives one (Black Heart) Black Heart.
(Added in Repentance) Once used, the (Boss Room) Boss Room item pedestal for that floor will be replaced by a Deal with the Devil. These items must be paid for as a normal Devil Deal would. This does affect (Angel Room) Angel Room / (Devil Room) Devil Room chance, so if Isaac takes this item, no Angel Rooms will appear for the rest of the run unless he has Act of Contrition, Book of Virtues, Duality or Eucharist. Alternatively, playing (Sacrifice Room) Sacrifice Rooms and (Confessional.png) Confessionals (usually) allows Angel Rooms to spawn on the current floor.
- This does not affect The Polaroid, The Negative, or Dad's Note.
(Added in Afterbirth †) This item belongs to the Bookworm set. Collecting three items from this set will transform Isaac into Bookworm.

(Added in Repentance) Bosses with set drops aside from (Mom) Mom will still drop their normal item, but at the cost of one Heart Container.
(Added in Repentance) On XL floors, both items will become Devil Deals, even if Satanic Bible was only used once.
(Added in Repentance) During Ascent, any devil items that were not picked up may be purchased for 15 pennies.
(Added in Repentance) (The Lost) The Lost, (Tainted Lost) Tainted Lost, and (Tainted Jacob) Tainted Jacob in his ghost form can safely take any (Boss Room) Boss Room item pedestals and it has no effect on subsequent devil deals.
- This does not apply to the Lost form granted by the white fire on (Downpour) Downpour / (Dross) Dross II. Taking a deal in this form will still remove hearts.
(Added in Repentance) This does not affect the items dropped on (The Void) The Void.
(Added in Repentance) Using the Satanic Bible changes the Boss Room's item pool to the Devil Room item pool for purposes other than direct boss rewards as well. This works even if the boss does not normally drop items, such as (Mom) Mom, (Satan) Satan, or (???) ???.
- Rerolls such as The D6, (Rune of Perthro) Rune of Perthro, or (Soul of Isaac) Soul of Isaac will generate Devil Room items.
- Using Satanic Bible after the Boss Room item has spawned, followed by any reroll, causes the new item to be drawn from the Devil Room item pool, but it will have no heart cost.

(Added in Repentance) Book of Virtues: Spawns black wisps in the middle ring, looking like a red inverted cross. Each wisp gives Isaac +10% Devil Room chance.
(Added in Repentance) There's Options: 2 Devil Deals will be offered, but only one can be taken.

(Added in Repentance) Chaos: The item spawned will be chosen from a random item pool instead.
(Added in Repentance) Lemegeton: Will generate wisps from the Devil Room item pool when used inside the (Boss Room) Boss Room after Satanic Bible is used.
(Added in Repentance) Vanishing Twin: The second boss spawned will also drop an item from the Devil Room item pool.