The Book of Belial

From The Binding of Isaac: Rebirth Wiki
Jump to navigation Jump to search

Not to be confused with Collectible Satanic Bible icon.pngSatanic Bible.

The Book of Belial is an activated item.

Effects

  • Gives +2 damage for the current room.
  • (in Rebirth) Guarantees the Devil RoomDevil Room or Angel RoomAngel Room to spawn after killing a boss while holding it.
  • (except in Rebirth) Increases the chance to open the Devil RoomDevil Room or Angel RoomAngel Room after killing a boss by 12.5% while holding it.
  • (in Afterbirth † and Repentance) This item belongs to the BookwormBookworm set. Collecting three items from this set will transform Isaac into Bookworm.

Notes

  • Character Judas icon.pngJudas starts with this item by default.
  • (except in Repentance) While activated, switching items will end the bonus damage effect.
  • (except in Repentance) If the (in Afterbirth † and Repentance)Collectible Schoolbag icon.pngSchoolbag and a second activated item are held, the book must be equipped in the primary slot to receive the Devil RoomDevil Room / Angel RoomAngel Room bonus.
  • (in Rebirth) Only guarantees Devil/Angel Rooms on floors that they can normally appear on, and, unlike Collectible Goat Head icon.pngGoat Head, picking up The Book of Belial after killing the boss will not open the Devil/Angel Room door.
  • (except in Repentance) The damage bonus does not stack with multiple uses in the same room or with XV - The DevilXV - The Devil.
    • (in Repentance) Additional uses in the same room or combined with XV - The DevilXV - The Devil give +1 damage per use.

Synergies

Interactions

(in Repentance) Judas' Birthright Combinations

While holding Collectible Birthright icon.pngBirthright with Character Judas icon.pngJudas or Character Dark Judas icon.pngDark Judas, Book of Belial is able to be held alongside another active item, similarly to Collectible Book of Virtues icon.pngBook of Virtues. The book provides +0.66 damage for each charge of the held item. Items that do not require charges to use do not grant a damage bonus unless there is an exception listed below.

Certain active items also gain additional effects, which are noted below; any items not listed have their standard effects aside from the temporary damage up Birthright gives them.

  • Collectible Alabaster Box icon.pngAlabaster Box: Changes the payout to 2 Black Heart.pngBlack Hearts and 1 item from the Devil Room item pool. If a Devil Deal has been taken, the payout is boosted to 3 Black Hearts and 2 Devil items.
  • Collectible Bag of Crafting icon.pngBag of Crafting: Collecting Red Heart.pngRed Hearts, Half Red Heart.pngHalf Red Hearts, or Double Heart.pngDouble Hearts with this item has a chance to transform them into Black Heart.pngBlack Hearts. When a heart is transformed in this way, a special sound plays and a black smoke puff appears. Does not work with Red Heart.pngScared Hearts.
  • Collectible Blood Rights icon.pngBlood Rights: Invokes the effect of Collectible Razor Blade icon.pngRazor Blade along with its original effect.
  • Collectible Book of Virtues icon.pngBook of Virtues: Can be stacked along with Book of Belial, allowing you to carry 2 passive books and an activated item on top of them.
  • Collectible Breath of Life icon.pngBreath of Life: Judas leaves a damaging flame trail while the invincibility is active instead of creating beams of light. Blocking damage just as the invincibility begins deals heavy damage to all enemies in the room and grants Judas a temporary damage bonus.
  • Collectible Clicker icon.pngClicker: Replaces the most recently acquired item with Collectible Pentagram icon.pngPentagram instead of removing it. Birthright's effects will also change to that of the character transformed into.
  • Collectible Damocles icon.pngDamocles: The sword also increases Judas' damage by x1.4 then a flat +1 while it's active.
  • Collectible Dark Arts icon.pngDark Arts: Grants temporary damage ups for every enemy/projectile hit by Dark Arts, similarly to Character Tainted Judas icon.pngTainted Judas. This stacks with Character Dark Judas icon.pngDark Judas' inherent version of this, doubling the amount of damage gained.
  • Collectible Decap Attack icon.pngDecap Attack: Grants Judas +2 damage and ×3 tears fired per second while his head is detached from his body.
  • Collectible Forget Me Now icon.pngForget Me Now: Grants +2 damage up for the entirety of the new floor.
  • Collectible Genesis icon.pngGenesis: Grants a free Collectible Pentagram icon.pngPentagram that will not be removed by Genesis.
  • Collectible Glass Cannon icon.pngGlass Cannon: Grants Judas +2.67 damage up while Glass Cannon is broken.
  • Collectible Golden Razor icon.pngGolden Razor: Also invokes the effect of Collectible Magic Fingers icon.pngMagic Fingers when used, which occurs after the damage increase and deals an additional +5 damage; non-boss enemies killed by this effect also have a chance to drop 1-2 pennies.
  • Collectible Guppy's Paw icon.pngGuppy's Paw: Grants a permanent 0.5 damage up for every converted heart.
  • Collectible How to Jump icon.pngHow to Jump: Enemies Judas jumps through take 2 + 0.2 × floor contact damage and are set on fire. The burn deals damage equal to Judas' damage, and ticks up to 5 times.
  • Collectible Isaac's Tears icon.pngIsaac's Tears: Fires a ring of 10 tears instead of 8, the tears are piercing and spectral, and the tears deal 1.4 × Judas' damage, plus a flat 5.
  • Collectible IV Bag icon.pngIV Bag: Gives a temporary +0.66 damage up with each use.
  • Collectible The Jar icon.pngThe Jar: Instead of dropping hearts on the floor, using The Jar consumes up to one full heart in the jar at a time, giving a temporary +0.66 damage up for each half heart consumed and spawning a puddle of red creep that deals 2 damage per tick (20 damage per second).
  • Collectible Jar of Wisps icon.pngJar of Wisps: Will only spawn Collectible Satanic Bible icon.pngSatanic Bible wisps that increase Judas' Devil RoomDevil Room chance by 10% for each one he has.
  • Collectible Kamikaze! icon.pngKamikaze!: Invokes the effect of Collectible The Necronomicon icon.pngThe Necronomicon effect along with the original effect.
  • Collectible Magic Fingers icon.pngMagic Fingers: Also has a chance to invoke the effect of Collectible Golden Razor icon.pngGolden Razor.
  • Collectible Magic Skin icon.pngMagic Skin: Grants a permanent +0.5 damage up on use in addition to the temporary +4 damage up given to it by Birthright. This bonus is not lost if the broken hearts are removed.
  • Collectible Notched Axe icon.pngNotched Axe: The axe receives a purplish glow and receives the following upgrades:
    • Increased durability: Each use of the axe has a very high chance not to use a charge.
    • Faster usage: The axe can be swung up to four times per second, regardless of Judas' tears stat.
    • Higher knockback: Enemies are knocked back when hit, receiving 8 + 0.2 × floor damage if they collide with a wall, obstacle, or other enemies.
    • Fire effect: The axe will set enemies on fire. The burn deals damage equal to Judas' damage, and ticks up to 5 times.
    • Increased luck: destroying obstacles with the axe has an increased chance to spawn pickups.
      • Destroying Poop.pngPoops will spawn pickups much more frequently. When combined with Petrified PoopPetrified Poop, the chance becomes 100% and will often result in multiple pickups from a single poop.
      • Destroying Tinted Rocks will drop more consumables than usual, similarly to Super Special Rocks.
      • Destroying Props (such as Urns, Mushrooms, Skulls, and Polyps) gives the prop an extra chance to drop its rewards. This can result in a single prop giving multiple drops.
      • Destroying Fool's Gold rocks will drop significantly more coins.
  • Collectible Pandora's Box icon.pngPandora's Box: In addition to the item's expected reward, spawns one of the following demonic familiars: Collectible Blood Puppy icon.pngBlood Puppy, Collectible Dark Bum icon.pngDark Bum, Collectible Demon Baby icon.pngDemon Baby, Collectible Incubus icon.pngIncubus, Collectible Lil Abaddon icon.pngLil Abaddon, Collectible Lil Brimstone icon.pngLil Brimstone, Collectible Succubus icon.pngSuccubus, or Collectible Twisted Pair icon.pngTwisted Pair.
  • Collectible Plan C icon.pngPlan C: Respawns Judas as Character Dark Judas icon.pngDark Judas if he has an extra life.
  • Collectible Potato Peeler icon.pngPotato Peeler: Each use grants a permanent +0.5 normal damage up in addition to a +0.2 flat damage up.
  • Collectible Razor Blade icon.pngRazor Blade: Invokes the effect of Collectible The Necronomicon icon.pngThe Necronomicon effect along with the original effect.
  • Collectible Sacrificial Altar icon.pngSacrificial Altar: Grants +10.8 temporary damage up for every sacrificed familiar. The damage bonus scales down to 0 over time, similarly to Collectible Red Stew icon.pngRed Stew. Sacrificing blue flies or blue spiders has no special effect.
  • Collectible Sharp Key icon.pngSharp Key: Invokes the effect of Collectible Razor Blade icon.pngRazor Blade without dealing damage to Judas along with the original effect.
  • Collectible Stitches icon.pngStitches: Creates a shadowy line similar to Collectible Dark Arts icon.pngDark Arts between Judas and the familiar. Enemies caught in the line take damage equal to 2 × Judas' damage, plus a flat 3.
  • Collectible Urn of Souls icon.pngUrn of Souls: The stream of fire is replaced with a controllable Collectible Brimstone icon.pngBrimstone beam that destroys projectiles and deals more damage the longer it's active. The minimum damage is 3.37 + 0.361 × floor, and the maximum damage is 4.2 + 0.45 × floor, which it scales up to over the course of 3 seconds of continuous fire. Souls dropped from enemies are colored red, and the Urn displays a red graphic on the HUD when active.
  • Collectible Vade Retro icon.pngVade Retro: Instead of exploding on the spot, souls home in on nearby enemies and explode on contact, similarly to Collectible Purgatory icon.pngPurgatory. The souls deal 2 × Judas's damage up to 3 times and destroy projectiles.
  • Collectible Wavy Cap icon.pngWavy Cap: Gives a damage bonus which lasts until the next floor equal to 0.2 × the maximum number of times Wavy Cap's effects have been stacked.

In-game Footage

Gallery

Trivia

  • This item also increases the odds of getting an Angel RoomAngel Rooms even though it is a Satanic book.
  • It is one of the four books in the Satanic Bible.
  • Belial is a name used for Boss Satan ingame.pngSatan in some Jewish and Christian texts.
  • (in Repentance) This item is used in Bloody Mary (Challenge #37).
  • (in Repentance) The previously unused item ID 59 is now occupied by the active/passive version of Book of Belial, which is obtained when Character Judas icon.pngJudas or Character Dark Judas icon.pngDark Judas has Collectible Birthright icon.pngBirthright.
  • (in Repentance) The effect of Notched Axe with Character Judas icon.pngJudas' and Character Dark Judas icon.pngDark Judas' Birthright is a reference to Minecraft's enchanting mechanic.
    • All of its upgrades are based on existing Minecraft enchantments — Unbreaking, Fire Aspect, Knockback, Efficiency, and Fortune.
    • However, Fire Aspect and Knockback normally cannot be applied to pickaxes in Minecraft, making it an odd choice for Notched Axe to have these buffs.