recursal/Fanatic-Fandom huggingface dataset:
Box

*Not to be confused with  or .*

**Box** is a passive item.

## Effects

* Spawns:
	+ 1 coin
	+ 1 Key
	+ 1 Bomb
	+ 1 Heart
	+ 1 card/rune
	+ 1 pill
	+ 1 trinket

## Notes

* The Box's pickups can be of any variety:
	+ Coin: Nickel, Dime, Lucky, Sticky Nickel, Golden
	+ Bomb: 1+1 Bombs, Troll Bomb, Golden Bomb
	+ Heart: Double Heart, Half-Heart, Soul, Half-Soul, Black, Eternal, Gold, Bone, Rotten
	+ Key: Golden, Charged Key
	+ Card: Reversed Cards
	+ Rune: Soul Stones
	+ Pill: Horse or Golden pills
	+ Trinket: Golden Trinket
* Dropping this item as  Tainted Isaac and picking it back up will not spawn consumables again.

## Trivia

* While walking to the right, Isaac's name can be seen written on the box.
* This item was the final item added in Wrath of the Lamb.
* Item drops are seeded
Boss Room

Boss Rooms contain one of the many bosses, with victory granting Isaac an item from the Boss pool, hearts (depending on difficulty), and a trap door leading to the next level.

## Notes

* Double Trouble Boss Rooms contain 2 bosses of the same type from the previous chapter. Defeating them only gives one item. Double Trouble Boss Rooms only appear from chapter 2 onward.
	+ Double Trouble Boss Rooms can now contain 2 bosses of different types. Additionally, they can appear as early as chapter 1.
* If the floor is affected by Curse of the Labyrinth, 2 separate Boss Rooms will appear in series. The trapdoor to the next floor will only appear after defeating the second boss.
* When a boss is defeated, an entrance to a Devil Room or Angel Room can appear.
	+ A Devil Room door can't appear on the first floor, unless  is used. A Devil Room door can also appear in a boss room on the first floor if the floor is spawned with the Curse of the Labyrinth, in which the Devil Room door will appear after defeating the second boss.
	+ Upon defeating Mom's Heart, a Devil Room containing a trapdoor or an Angel Room containing a beam of light may appear. This allows Isaac to visit Sheol or Cathedral respectively even if It Lives has not yet been unlocked. If one of these paths is taken instead of touching the large chest, the next Mom's Heart ending will not play but will be unlocked and it will count as a victory against Mom's Heart.
		- Devil Rooms and Angel Rooms no longer contain a trapdoor or a beam after defeating It Lives. They instead have their normal contents.
* Mr. Fred,  Tuff Twins,  Great Gideon,  The Shell, and Mega Satan are always fought in a double-sized room.
	+ Hush is always fought in a 2x2 room and Ultra Greed is fought in a double-sized one (2x1).
	+ Delirium is fought in a 2x2 room.
	+ Mother is a fought in a regular room in her first phase, which expands to a 2x1 room for her second.
* Before the boss has been defeated, the eyes of the skull above the boss room's door are flashing.
Cat-O-Nine-Tails

**Cat-O-Nine-Tails** is a passive item.

## Effects

* +1 damage.
* +0.23 shot speed.

## Trivia

* A Cat o' Nine Tails is a multi-tailed whip commonly used in physical punishment and torture.
* Unlike in Rebirth, in the original game, Cat-O-Nine-Tails was merely a shot speed up and was widely considered by the community to be one of the worst items in the game.
Cursed Skull

**Cursed Skull** is a trinket.

## Effects

* If Isaac has less than one full Red Heart after taking damage, he will be immediately teleported to a random room.
	+ The teleportation happens only at half a heart or less left, regardless of health type. Empty Bone Hearts are not counted as health even if they can absorb a hit.

## Interactions

* : Provided Scapular can always trigger, grants effective immortality, as the soul heart is always given before the teleport takes place.
	+ +: Grants true immortality, plus one hit on the soul heart, allowing the player to get hit once before teleporting.

## Notes

* Does not affect  The Lost, as being hit with  does not count as taking damage.
	+ It will affect Isaac with , teleporting the player out of the room and restoring the Holy Mantle charge.
* It is not recommended to have this item equipped during a boss fight as the boss's health will be restored to 100% if the player is teleported out of the room and returns, placing the player at a disadvantage unless they have acquired a .
Conjoined

After picking up three baby familiar items from the following list ( 3 items with the `baby` item tag), Isaac grows two tumor faces from his cheeks, which fire simultaneously and diagonally similar to the effect of , while continuing to shoot forwards. Decreases Isaac's damage by 0.3 and decreases Isaac's tears by 0.3.

## Notes

* Isaac starts with this transformation in The Family Man challenge, but due to the challenge's blindfolded property, it's useless without .
* , , , and  Lilith's  do not contribute toward the transformation.
* Familiars obtained from ,  or  do not contribute toward the transformation.
* Familiars obtained from  contribute toward the transformation.
* Using  can remove Conjoined if it lowers the number of familiars below 3.

## Gallery

* Concept art for the Conjoined transformation and other Afterbirth transformations by Edmund McMillen.
Contract From Below

**Contract From Below** is a passive item.

## Effects

* Doubles any pickups and Chests earned for clearing a room, but has a 1/3 chance of removing the reward completely.
	+ Neither effect applies to trinkets.
	+ Doubled Chests will not necessarily be of the same kind.
	+ Neither effect applies to Pennies dropped in Greed Mode.
		- No longer obtainable in Greed Mode.

## Synergies

* : Each additional Contract increases the number of room drops by one and lowers the chance of getting nothing.
* : Higher chance of double chests upon clearing a room.
* : If Contract removes the reward, spawns 1-3 random coins.
* : Spawns a second set of consumables. The "Options?" consumable is not guaranteed to be the same for each copy of the original consumable.

## Trivia

* A reference to the card of the same name from Magic: the Gathering, a collectible card game Edmund McMillen played since his childhood, this is more notable in the artwork of the [in Four Souls] where the words written in the contract are word for word identical to the ones written in the original contract from below card.
* Isaac's name is written at the bottom of the contract, implying that he signed the contract.
Corpse Eater

**Corpse Eaters** are monstrous enemies that dwell in the later chapters. Their behavior is similar to that of a Grub, wandering around the room aimlessly and charging at the player if he gets in its line of sight. Greater caution is advised, however, as Corpse Eaters move a lot faster than Grubs. Also, Corpse Eaters will occasionally target enemies such as Small Maggots, Gapers, or even bosses like the Gurglings, and eat them. Upon successfully doing so, the Corpse Eater will gain health (based on the health of the eaten enemy, up to a maximum of double its original health) and start spitting out large quantities of blood shots and bones in all directions as they move about, creating additional hazards.

## Variations

### Carrion Rider

The **Carrion Rider** is a rare variant of the Corpse Eater. It is a Bony riding a Corpse Eater, making it one of the only fusion enemies in the game. It behaves similarly to the Corpse Eater, while the Bony riding it rapidly fires bone projectiles at the player. Upon defeating it, the Corpse Eater dies, leaving a now unmounted Bony left to attack the player on foot.

## Trivia

* If a Corpse Eater eats an enemy, its mouth will turn bloody. They'll also leave a puddle of creep until their mouth stops being bloody.
* The Carrion Rider was possibly inspired by *Minecraft'*s Spider Jockey, an enemy fusion consisting of a skeleton riding a giant spider.
Breakfast

**Breakfast** is a passive item.

## Effect

* Grants one full Red Heart container.
* Heals 1 additional Red Heart.

## Notes

* If the Treasure Room Pool runs out of items, it will only contain Breakfast from that point onwards.
	+ Once other item pools run out of items, they will only contain Treasure Room Pool items. This means that if the Treasure Room Pool was also exhausted, that item pool will only contain Breakfast.
		- With , every fully depleted item pool will only contain Breakfast.
	+ Breakfast spawned via exhausted item pools cannot be rerolled into other items with a few exceptions:
		- Rerolling Breakfast from an exhausted item pool while holding  can reroll it into an item from another pool.
			* This also works with .
		- Dropping  after exhausting an item pool while holding it will allow active items to spawn on pedestals again.
		- Having an item spawn from a non-exhausted pool before picking up Breakfast can allow rerolls to collected passive items (e.g. ) to reroll Breakfast into an item from that item pool.
		- Losing  after exhausting an item pool while holding it will allow low quality items to appear again.

## Synergies

* : When Isaac picks up Breakfast it now grants: a permanent +0.2 Shot Speed and +2.5 Range, a temporary +3.6 Damage (which diminishes to 0 in 30 seconds), heals 1 additional red heart, and takes a permanent -0.03 Speed reduction.
	+ Item pedestals can also cycle between the initial item and Breakfast due to Binge Eater.

## Trivia

* In Edmund McMillen's first post-Repentance Lore Stream, he revealed that the pinkish-yellow label on the left side of the breakfast sprite is actually meant to be a portrait of Isaac, referencing the practice of advertising lost children on milk cartons that was popular in the United States during the 1980s.
* The term used by the community when an item pool is depleted is "breakfasting."
	+ In a Twitter Q&A, Edmund revealed that breakfasting was originally a bug.
* Breakfast’s sprites can be seen as part of .

## References

1. ↑ https://twitter.com/HenrRicci/status/1318738787971858432
Continuum

### Collection Grid

*(page 4, column 4, row 1)**(page 4, column 4, row 1)**(page 4, column 5, row 1)*

**Continuum** is a passive item added in *The Binding of Isaac: Afterbirth*.

## Effects

* Grants spectral tears.
* When tears travel off-screen, they loop back around through the opposite wall.
* +2.25 range.
* +3 range.
* +1.5 tear falling speed.

## Notes

* When fighting  The Beast tears will not loop downward like you see in a Crawl Space.

## Synergies

* Any item that grants multiple shots like  and  are good items to take.
* Azazel/// Tainted Azazel: The laser continues behind Isaac and back once again, potentially hitting enemies twice in one blast.
* : Bob's Rotten Head can now travel through walls and appear out of the opposite wall, similar to a portal-type mechanic.
	+ No longer travels through the wall; instead he bounces off it, like with , and then travels for the rest of its duration and then explodes.
* The Forgotten: The skeleton form's charge attack can loop through walls.
* : Tears will continually gain damage when passing through walls.
* : Causes Mom's Knife to appear on the opposite wall if thrown through one. It then returns through the wall to Isaac.
	+ **Mom's Knife** + **Brimstone**: The barrage of knives flies across the room until it hits the wall twice.
* : When shooting through a wall, tears speed up towards Isaac rather than returning through the original wall. With enough shot speed and range the tears can loop twice.
* : Laser rings will go through walls, extra distance depending on shot speed.
	+ **Tech X** + : Incubus's laser rings cannot go through walls. This applies to  Lilith too.
	+ :**Tech X** + : Laser rings travel through walls and continue on the other side of the room.
* : Causes the tears to loop right back in front of Isaac after they go offscreen.

## Interactions

* : Overrides Continuum, stat effects apply.
* /: Tears will only split when hitting obstacles or enemies but not walls.
	+ Tears will split on contact with walls. Only one split will occur on contact with Walls and Objects.
* : Bombs cannot go through walls, but are spectral.
* /: Overrides Continuum, stat effects apply.
* : When the tear is moved offscreen, it loops back through the opposite wall.
* : Tears shrink while traveling through walls and often disappear before they can reappear on the other side.
* : Tears will travel through walls; however, the electricity will not connect the tears while they are outside the room. Once tears have passed through walls, the electric arcs connect very erratically to other tears, limiting the efficiency of the combination.
* : Tears that travel through walls will travel until they reach Isaac and start orbiting him again.

## Trivia

* The tears fired by Isaac look similar to the projectiles fired during Hush's fight.
Curse Room

**Curse Rooms** feature teeth-like spikes on the door that hurt Isaac when entering and exiting the room.

Curse rooms can appear from Chapter 1 to 5.

 Taking damage from the spikes doesn't reduce the odds of getting a Devil or Angel room.

## Contents

Curse Rooms can feature the following things:

* Red Chests
* An item from the Curse Room pool
* Bomb Chests
* Black Hearts
* Spiders
* Big Spider
* Devil Beggars
* Blue Fire Places
* Cards
* Runes
* Imps
* Nulls
* Reward Plates
* Black Globin's Heads
* A Devil statue and a random item or trinket, surrounded by spikes
* Bulbs
* Black Sacks

## Greed mode contents

In Greed mode, curse rooms can feature the following things:

* Red Chests
* Locked Chests
* Bomb Chests
* Reward Plates
* Red Hearts
* Keys
* Bombs
* Pills
* Cards
* Runes
* Pennies
* Spiders
* A bed

## Notes

* Items that grant flight allow Isaac to avoid damage taken upon entering a Curse Room, but do not prevent damage taken upon leaving.
* Any item that gives Isaac a shield or invulnerability will prevent damage taken when passing through a Curse Room Door, including .
* If a Secret Room is next to a Curse Room, it can be entered without taking any damage by bombing the wall between these rooms from the Secret Room.
* The damage done by the Curse Room's door is applied when touching the door. This means that Isaac can be damaged by it without actually going through the door, and any effects that occur upon taking damage will occur in the current room and not the room that the door leads to.
* During Cursed! (challenge #10), all doors except for special types turn into this type of door.
* Damage taken from entering a Curse Room doesn't count for the purposes of score calculation.
* Holding  will remove the spikes from Curse Room doors, allowing them to be entered without taking damage.

## Trivia

* The Curse Room's icon is similar to the icon of .
Brain

### Found In

**Brains** slide around the room erratically in the cardinal directions, leaving a trail of Red Creep, they deal a whole heart of contact damage. When Isaac is within line of sight they will charge in his direction until they collide with an obstacle or another enemy similar to Knights.

## Variants

### Stage HP

 20
 0

### Unlock Method

 Defeat The Lamb

**Poison Minds** behave like regular Brains, but they slide diagonally and leave a trail of Green Creep.

 Poison Minds float, passing over obstacles, and explode when killed.

### Stage HP

 20
 0

### Found In

Spawned after killing a Black Globin.

**Black Globin's Heads** behave like Brains, but they target Isaac directly, chasing him.

### Notes

* They can spawn in unique Devil Room layouts if Isaac is holding the .

### Stage HP

 22
 0

### Found In

Spawned exclusively by Gutted Fatties.

**Festering Guts** are spawned exclusively by Gutted Fatties. They travel around the room randomly in cardinal directions and occasionally spawn a Charger.

### Stage HP

 20
 0

### Found In

**Pons** hop around erratically leaving Red Creep wherever they land. If close to Isaac then they will hop towards Isaac chasing him similarly to Hoppers.

They can spawn with a paired Brainless Knight in which killing them is required to kill their corresponding Brainless Knight. A Pon and a Brainless Knight pair will always spawn when Loose Knight is killed.

## Notes

* If Poison Minds aren't unlocked yet, they are replaced by Brains.
* Black Globin's Heads can spawn in Super Secret Rooms.

## Trivia

* The Pon first appeared in the *Antibirth* mod where it could also appear in Depths.
* The name of **Pon** is likely in reference to the Pons region of the brain, a part of the brainstem associated with respiration and other autonomic functions.
	+ It could also be a reference to the pawns of the game Chess, referencing the name of the enemy it is attached to, the Knight.[1]
Cracked Orb

**Cracked Orb** is an unlockable passive item added in *The Binding of Isaac: Repentance*.

## Effects

* Upon taking damage, activates the following effects:
	+ Unlocks all locked doors in the room (doors that need the room to be cleared are not affected).
	+ Opens the Secret Room and the Super Secret Room if adjacent to the room you are in.
	+ Reveals a random unmapped room on the floor.
	+ Destroys all tinted rocks and rocks with Crawl Spaces in the room.

## Notes

* The effect is able to reveal the Ultra Secret Room.
* The unlocking effect is able to open:
	+ The golden door to Mega Satan;
	+ Doors leading to Downpour / Mines / Mausoleum;
	+ The entrance to the Mom's Heart fight in the Mausoleum and Gehenna;
	+ A Strange Door.
* The effect will not open the doors to:
	+ Challenge Room from the outside;
	+ Regular doors in Chest / Dark Room.
	+ Boss Rush / ??? doors even after the fight.
	+ Greed Mode

## Synergies

* /  / : Makes it extremely easy to destroy tinted rocks and enter Crawl Spaces.
* : Allows to benefit from the item without taking actual damage.
* /  /  / : Having more rooms discovered makes Cracked Orb more likely to reveal the ultra secret room.
Burnt Penny

**Burnt Penny** is an unlockable trinket.

## Effects

* Gives a chance to drop a Bomb when money is collected.
	+ 50% chance.
	+ The chance is based on the coin's worth:

 Dime | 94.37%

* These Bombs may be any normal type with their respective usual chances: Bombs, Troll Bombs, or  Golden Bombs.
	+ Can only spawn regular Bombs by itself. and Double Bombs with certain synergies.

## Synergies

* : All normal Bombs spawned by the trinket become Double Bombs.
* : All normal Bombs spawned by the trinket get a 50% chance to turn into Double Bombs.
* Tainted Keeper: The trinket works with the temporary coins spawned from defeating enemies, effectively turning it into an infinite Bombs generator.

## Notes

* In addition to regular trinket drop sources, Burnt Penny may rarely drop from TNT barrels,  Special Shopkeepers,  as well as a rare room with fires found in Depths.
* Can show up in the Beans! challenge, without being unlocked.
* Can always appear in a specific room layout, even prior to unlocking it.

## References

1. ↑ The chance is calculated as 1-0.75(coin\_worth)
Corrupt Data

This article is about damaged savefiles. For the achievement, see Corrupted Data.
Corrupt data is a savefile state where the savefile can not be loaded due to an error. There are several conditions that may induce corruption in the savefile.

**Issues:** Verification on the specifics of what causes corruption is needed.

## Importing Save Files Manually

Importing save files may not work properly, as some important things might have not been moved in the manual import, resulting in an unusable imported version.

## Installing DLCs

Due to the numerous changes between DLCs, automatic savefile importing may also result in errors when installing *Afterbirth+* or *Repentance*.

Errors are more likely while having a save file with a run already started.[*citation needed*]

## Hardware/Software Issues

Misbehaving hardware or software on the computer/console may cause damage to the game state while it's held in memory, and if written to disk can corrupt the save file.

## Modifying Game Files

Modified game files could cause unstable or even deleterious effects on the game; the files should be edited only with proper modding knowledge and tested on a save file that is not important.

## Modifying Save Files

Although the save data can be edited directly using binary/hex editing tools, it is very risky as the format is complex and an edit without accounting for integrity of the data and checksums will likely render the file unusable.
Box of Spiders

### Collection Grid

*(page 3, column 3, row 9)**(page 3, column 3, row 3)**(page 3, column 4, row 3)*

**Box of Spiders** is an activated item.

## Effects

* Spawns 1-4 Blue Spiders.
* Spawns 4-8 Blue Spiders.
* This item belongs to the  set. Collecting three items from this set will transform Isaac into a humanoid spider.

## Notes

* Blue Spiders deal 2.5x Isaac's damage.
* Blue Spiders deal 2x Isaac's damage.

## Interactions

* : Spawns wisps instead of spiders, in the outer ring. Wisps summon Blue Spiders when destroyed. One wisp contains one Blue Spider.

## Gallery

* 3DS The icon of Box of Spiders as seen on the lower 3DS screen.

## Trivia

* A box full of spiders is an old way of getting your kids to stop misbehaving. The child is handed a box with a supposed gift inside, only to be scared by spiders as punishment.
Bot Fly

**Bot Fly** is a passive item added in *The Binding of Isaac: Repentance*.

## Effects

* Spawns a robotic Pooter familiar that orbits around Isaac and fires shielded tears at incoming enemy projectiles, similar to those from .
	+ The shielded tears home in on projectiles, but not enemies.
	+ The familiar deals 1 contact damage per tick or 3 damage per second, and instantly kills weak fly enemies on contact.
* This item belongs to the  set. Collecting three items from this set will transform Isaac into a giant humanoid fly.

## Notes

* Only 5 Bot Flies can circle Isaac at a time.

## Interactions

* : Turns into  when rerolled by Spindown Dice.

## Trivia

* Bot Fly is from the *Antibirth* mod. In *Antibirth*, the shots would home on projectiles only when paired with .
* This item's name appears to be a play on the word "bot" when used as shorthand for "robot" and on "botfly", a parasitic insect which lives in tropical climates.
* This item’s behavior and pickup quote is likely a reference to Defense Drones in the roguelike game *FTL: Faster Than Light*.
Corrupted Data

This article is about the achievement. For the unplayable state of a save file, see Corrupt Data.
**Corrupted Data** is an achievement and a permanent effect on the save file it is unlocked for.

## Effect

* Secret rooms and I AM ERROR rooms now have a chance of generating glitch items, as if caused by . The effect is extremely rare in Secret rooms and uncommon in I AM ERROR rooms.

## Trivia

* **Corrupted Data** is one of the few unlocks for any character that isn't either an Item, Pickup, Character, or Baby, along with Charming Poop, Fool's Gold Rocks, Crane Game, Hell Game, Rotten beggars and Confessionals.
Curved Horn

**Curved Horn** is an unlockable trinket.

## Notes

* Since Curved Horn's damage increase counts as flat damage, its damage up is applied after every calculation, but before damage multipliers. As a result, it is not subject to the lower effect in damage that other damage-boosting items are subject to. Other flat damage increasing effects, such as those granted by  or , share this rule.
	+ Curved Horn is still affected by damage multipliers, both beneficial ones (such as  or ) and detrimental ones (such as  or ).

## Trivia

* This trinket is a curved ram horn, similar to those granted by  or shown on The Lamb.
Cain's Eye

*Not to be confused with .*

**Cain's Eye** is an unlockable trinket.

## Effects

* When starting a floor, 25% chance to gain the effect of  for the duration of the floor.
	+ The chance increases based on the Luck stat, and the formula used to determine the chance is:

	1

	4
	−

	⌊

	L
	u
	c
	k

	⌋

	{\displaystyle \frac1 { 4 - \left \lfloor \mathit{Luck} \right \rfloor}}

		- At base luck (0), the chance is 25%, maxing out at 100% at 3 luck.

## Notes

* Cannot appear in Greed Mode.
* Due to the very low luck requirement, this trinket can easily serve as an alternative to .

## Synergies

* : Can make it easier to gain  as Book of Secrets cannot give a mapping effect Isaac already has.
* : Traveling back to the previous floor and going back down may trigger the Cain's Eye if it hasn’t triggered before.

## Trivia

* Due to the existence of , this trinket is implied to be  Cain's healthy eye.
Bucket of Lard

### Collection Grid

*(page 2, column 6, row 3)**(page 2, column 6, row 1)*

*Not to be confused with .*

**Bucket of Lard** is a passive item.

## Effects

* Adds 2 empty Red Heart containers.
* Adds 2 full Red Heart containers.
* -0.2 speed.
* Heals for a Half Red Heart.

## Notes

* This item can drop from Super Gluttony.

## Trivia

* This item is used in The Tank (challenge #5).
* The costume given by this item is identical to  and .
Bum Friend

**Bum Friend** is a passive item.

## Effects

* Spawns a familiar who follows Isaac and picks up coins on the ground.
* After picking up 6 coins, Bum Friend will return to Isaac and drop a pickup.
* After that, Bum Friend has a 67% chance to drop a pickup after picking up 3 coins and a 33% chance to drop a pickup after picking up 4 coins.
* Bum Friend has an additional chance to drop batteries and items from the Beggar item pool.
* This item belongs to the  set. Collecting three items from this set will transform Isaac's bums into Super Bum.

## Notes

* Bum Friend cannot pick up Sticky Nickels.
* Bum Friend can pick up Lucky Pennies, but it will simply count as a regular Penny and will not grant luck.
* From a scoring perspective, Pennies that Bum Friend picks up count towards your Schwag bonus on daily runs.
* Bum Friend does not join the line of familiars that follow behind Isaac.
* Not recommended for  Keeper as it will make it harder to regain health due to the Keeper healing via coins.

## Drops

* Bum Friend can drop:
	+ Red Hearts
	+ Bombs
	+ Keys
	+ Cards and Runes
	+ Pills
	+ Trinkets
	+ Lil' Batteries
	+ Items from the Beggar Item Pool

## Synergies

* : All future drops will happen every 3 coins. If the next scheduled drop at the moment of acquiring BFFS! requires more than 3 coins, the amount will not be lowered.
* : Red Hearts that Bum drops can be converted into Soul Hearts.
* : Bum Friend's item pedestals will be affected by Chaos, spawning an item from a random pool.

## Trivia

* This item is the Beggar counterpart of  and .
Cathedral

*(chapter 5)*

The **Cathedral** is one of two unlockable floors following the Womb/Utero/Scarred Womb, the other being Sheol. After defeating Mom's Heart, an Angel Room may spawn containing a beam of light leading upwards to the Cathedral. Unlocking and defeating It Lives will always spawn a beam of light leading to the Cathedral, as well as a trapdoor leading to Sheol.

The Cathedral has only one floor, featuring mostly undead and/or holy enemies, and the boss is always Isaac.

Blue Fire Places are far more common in this floor than normally.

## Notes

* Some rooms contain Angel Statues that can be bombed to summon the Angels and acquire key pieces.
* If a trapdoor appears, it will lead to the Chest.

## Trivia

* In the original Binding of Isaac, the windows along the walls were much larger and had different patterns resembling  Isaac and a crucifix.
* The floor's theme, *Everlasting Hymn**,*** is one of the few tracks, together with *Morning Star*, *Living in the Light* and *Revelations 13-1,* that contains actual lyrics*: Dei, quod reliquum est, Nolite metuere, Et ossa tua liberabit, Exspectans*.
	+ Even though the latin in the song likely contains a few mistakes (like *dei*, which can only mean "of god" or "the gods" as subject of the sentence, or the inconsistency between the singular vocative "expectans" and the plural verb "nolite metuere") the more common translation is "O thou who await God, do not fear what is left and He will set thy bones free." Considering the fact that Isaac believes that killing himself is the morally correct thing to do (as he sees himself as being sinful or corrupted), the lyrics are encouraging Isaac to stay in the box and suffocate as his body panics for air.
* The theme of Cathedral (*Everlasting Hymn*), is noticeably shorter than other floor themed soundtracks. The second layer of the theme (for when entering a room with enemies and bosses with a high HP count), wasn't added in the official Ost, with the in-game second track being barely noticeable chants. The Dark Room's theme (*Devoid*) is also shorter, but actually lacks the second, intense part of the track.
* Interestingly, Cathedral was the only non-final level with no unique enemies. This was why it was given some enemies exclusive to the floor in Repentance (those being Holy Mulligans, Holy Eyes, and Holy Bonies).
	+ Holy Eyes, Holy Bonies, and Holy Mulligans were first seen in cards from the card game **The Binding of Isaac: Four Souls**.

## Music

* The music for the Cathedral is titled *Everlasting Hymn*.
Broken Syringe

**Broken Syringe** is a trinket added in *The Binding of Isaac: Repentance*.

## Effects

* When Isaac enters a new room, has a chance to give the effect of any syringe for the current room.

## Notes

* If  activates, it will give 3 random stat increases and decreases, as opposed to 4 stat increases and 2 decreases. Health cannot be one of the stats it selects.
* The chance for Broken Syringe to activate is unaffected by luck.
* Syringes that have not been unlocked can still be granted as one of the effects.

## Trivia

* Broken Syringe originates from the *Antibirth* mod.
	+ This trinket made its first debut in the Community Remix mod for Flash Isaac, previously being called ‘The Broken Syringe’.
Cube Baby

**Cube Baby** is a passive item added in *The Binding of Isaac: Repentance*.

## Effects

* Spawns an ice cube familiar. It cannot move on its own, but slides around when Isaac walks into it, uses a melee attack on it, or when Isaac or enemies shoot at it.
* The familiar damages and slows enemies it touches while moving. It can deal up to 11 damage when it collides with enemies, depending on how fast it's moving.
* Monsters killed by Cube Baby are frozen.
	+ Frozen monsters will follow the same physics as Cube Baby, and will shatter on impact creating ice shards that are capable of freezing other monsters
* Cube Baby can block enemy projectiles.
* This item belongs to the  set. Collecting three items from this set will transform Isaac into a three-faced version of himself.

## Notes

* + Killing enemies by freezing them does not however count as a "kill" for the purposes of activating the on kill effects of certain items and trinkets. Because of this, only enemies killed by icicles from statues, bombs, familiars and other sources will count towards the on kill effects, rendering them quite difficult to use. These items and trinkets are: , , , , , , , , , , and .

## Synergies

* : Cube Baby can be picked up and thrown. It will then slide at maximum speed in the direction it's thrown at and leave a trail of damaging white creep until it slows down.
Bumbo

### Collection Grid

*(page 4, column 20, row 1)**(page 4, column 20, row 1)**(page 4, column 1, row 2)*

**Bumbo** is a passive item added in *The Binding of Isaac: Afterbirth*.

## Effect

* Spawns a familiar which follows Isaac and picks up any nearby coins. Bumbo changes level based on the amount of coins it's collected.

 **Level 1 (0-5 coins):** Bumbo just collects coins to level up.
 **Level 2 (6-11 coins):** Bumbo occasionally drops a pickup, trinket, chest or pedestal item after a room clear.
 **Level 3 (12-23 coins):** Bumbo now fires tears that deal 3.5 damage in the same direction Isaac does. Bumbo's tears have a chance to drop a coin if they hit an enemy.
 **Level 4 (24+ coins):** Bumbo no longer fires tears and instead chases enemies slowly and deals contact damage (2.5 per tick, or 37.5 per second/10.7 per second). Bumbo will occasionally drop Bombs while chasing enemies or coins.
* After reaching level 4, Bumbo will continue to collect coins, and can drop a pickup, trinket, or chest for each coin it collects, similar to .
	+ Bumbo can also drop pedestal items.

## Notes

* Level 1-3 Bumbo can fly over pits and obstacles, despite having limbs at level 2 and 3 that serve him as legs.
* If Bumbo consumes an absurd amount of coins while level four, Bumbo can become level one again (Unsure if bug, likely a buffer overflow)
* If Level 4 Bumbo targets Mega Satan's head, Bumbo will attempt to "chase" him the entire fight by standing in the middle of the room.
* Level 4 Bumbo's bombs are unaffected by Isaac's bomb synergies.
* Bumbo cannot pick up Sticky Nickels and will hover over them. Level 4 Bumbo can eventually bomb the Sticky Nickel to free it.
* Bumbo will pick up Lucky Pennies, without additional benefit to evolution or drops.
* If Bumbo drops a pedestal item, it will be pulled from the current room's item pool.
* In a RERUN, Bumbo's level is reset.
* Level 4 Bumbo can target charmed enemies and will try to follow them around to no effect. This prevents him from picking up coins until the target is changed.
* There is a similar boss named Bumbino.
* From a scoring perspective, Coins that Bumbo picks up count towards your Schwag bonus on daily runs. (only applies to Afterbirth and Afterbirth ✞ dailies)

## Synergies

* : Doubles both the contact and shot damage, when applicable.

## Interactions

* : Will spawn a level 1 Bumbo regardless of the original Bumbo's current level.
* : The bum friend will follow Bumbo instead of Isaac.
* Keeper: Not recommended, as the coins Bumbo collects could have been used to heal Keeper.
* Tainted Keeper: Due to the large influx of coins spawned, it's technically possible to sustain Bumbo while also maintaining a good level of wealth and health.

## Trivia

* Bumbo is the main character of his own game, The Legend of Bum-Bo, designed by Edmund McMillen.
* The name is a play on the word bum and Rambo.
* Bumbo Level 1 looks similar to Bum Friend's head.

## Gallery

* Bumbo level 1
* Bumbo level 2
* Bumbo level 3
* Bumbo level 4
Daddy Long Legs

Degraded Boss

This article is about the boss. For the item, see Daddy Longlegs.
**Daddy Long Legs** is a boss that can appear:

* In all environments of Chapter 4 (Womb, Utero, Scarred Womb).
* Only in the Utero.

## Behavior

Daddy Long Legs' head hangs down stationary and can perform the following attacks:

* Raises his head, making it invulnerable, and stomps the ground in random locations around the room 4 times in quick succession.  One of these legs will always stomp on top of Isaac's position.
	+ The appendages that he stomps with can be attacked to damage him.
* Lifts his head off-screen and stomps the ground 4 times at regular intervals on top of Isaac's position. At the end of the 4 stomps, he slams his head down quickly, shooting out 8 projectiles in all directions. He can only slam his head down along a horizontal plane across the center of the room and slams it down close to Isaac's position.
	+ Occasionally performs a fifth stomp before slamming his head down.
	+ The appendages that he stomps with can be attacked to damage him.
* Spits out 2-3 Spiders.
	+ These spiders can be killed by Daddy Long Legs' stomps and head slam.

Daddy Long Legs' foot stomp and head slam deal a whole heart of contact damage.

## Gallery

* Daddy Long Legs in-game.
* One of his appendages.
* Daddy Long Legs as one of Delirium's forms.
* Concept art for Daddy Long Legs along with the Mask of Infamy and other enemies.

## Notes

* The passive item  is a familiar form of this boss, stomping enemies to assist Isaac. The familiar will even attack the Daddy Long Legs.
* Like Mom's stomp, his stomp deals explosive damage. On rooms where Daddy Long Legs is treated as a degraded Boss, they can be used to blow open doors.

## Trivia

* Daddy Long Legs was added in the *Wrath of the Lamb* DLC for the original *The Binding of Isaac*.
	+ In the original Binding of Isaac, Daddy Long Legs could be encountered in Necropolis.
* Daddy Long Legs's appendages consist of 2 hands and 2 legs; he will use each of them once in his stomping attacks.
	+ Only 3 appendages visually appear to be connected to his head despite him having 4.
* Daddy Long Legs is a colloquialism for various types of arachnids including Opiliones and Pholcidae.
* Triachnid is his alternative version.
* His limbs are also used by the Daddy Longlegs item. However, the item's take on his limbs behaves differently.
Catacombs

*(chapter 2)*

### Unlock Method

 Beat all Caves bosses ( except Bumbino) (not restricted to beating bosses *in* The Caves)

**The Catacombs** is one of the environments of Chapter 2.

The Catacombs are unlocked once each boss in the Caves has been defeated. It generally possesses more spiders and decayed enemies/bosses than the caves, like gurgles or guts.

 After  A Secret Exit is unlocked, a boarded door similar to the one leading to a Bedroom will appear in this floor's Boss Room upon defeating the boss, leading to the Mines / Ashpit. This door, like a Bedroom, requires two bombs to be opened. Unlike Angel Rooms and Devil Rooms, this door never disappears.

## Monsters

*Degraded Bosses:*

 The Hollow | 19.1

## Bosses

### Double Trouble

Gurglings

## Trivia

In the original Binding of Isaac, Blighted Ovum could appear as a boss.

## Unlockable Achievements

* Something Cute - Beat Chapter 2 30 times.

* Telekinesis - Beat Chapter 2 without taking damage.

* Spelunker Boy - Beat Chapter 2 without taking damage.

## Music

* The music for the Catacombs is titled *Capiticus Calvaria*.
	+ Calvaria is Latin for "Skull", and while Capiticus does not have a true definition, it most likely comes from the word Caput, meaning "Head", or Capitulum, meaning "Chapter".
Cupid's Arrow

**Cupid's Arrow** is a passive item.

## Effects

* Grants piercing tears that travel through enemies (but not obstacles) instead of breaking on impact with them.
	+ Also pierces through Poop and Fire Places.
	+ Tears no longer apply knockback to enemies.

## Interactions

* //: Tears can now knock enemies back again, but the knockback effectiveness of these items is reduced.
* : Bombs travel through enemies. When combined with , bombs do not explode upon hitting enemies.
	+ Bombs also deal 2.5x Isaac's damage to enemies when passing through them.
* : Tears will continue to pierce enemies while retaining the explosion chance.
* : Pierces through Poop and Fire Places, but not enemies.
	+ Doesn't pierce through Poop, Fire Places, or enemies.

## Trivia

* This item is used in Slow Roll (challenge #15) and  Pong (challenge #35).
* The item name is a reference to Valentine's Day and Cupid shooting an arrow into people's hearts to make them fall in love with someone.
* Despite its name, it does not charm enemies.
Consolation Prize

**Consolation Prize** is a passive item added in *The Binding of Isaac: Repentance*.

## Effects

* Gives Isaac one of the following stat boosts, depending on what attribute Isaac has the least of:
	+ +1.0 flat damage
	+ +0.5 fire rate
	+ +0.2 speed
	+ +2.5 range
* Also drops either 3 Coins, 1 Bomb, or 1 Key on the ground, depending on what Isaac has the least of.

## Notes

* Each key or bomb is equivalent to 3 coins. Thus, having 3 coins, 1 bomb and 1 key is counted as having the same amount of each.
* Pickups spawned can be variants of their type.
* The tears up can break the soft tears cap of 5, due to the fact that it is a fire rate modifier.
* If there is a tie between two or more stats/pickups for which is lowest, one of them is selected at random.
* Cards and trinkets that grant temporary stat increases will affect the stat given by Consolation Prize (e.g. using  or carrying  will likely prevent the item from granting a range up,  or  - speed, and so on.)
* As  Bethany, it can also spawn a Soul Heart if that is her lowest consumable; one soul heart is equivalent to 2 coins.
* The stat up is permanent and won't go away even if the item is removed, similar to .
	+ Because of that,  Tainted Isaac can pick it up and freely drop it without losing anything.

## Trivia

* Consolation Prize is from the *Antibirth* mod.
Brimstone Bombs

**Brimstone Bombs** is an unlockable passive item added in *The Binding of Isaac: Repentance*.

## Effects

* Gives Isaac +5 Bombs.
* Upon exploding, Isaac's bombs fire 4  lasers in the cardinal directions.
	+ Each laser deals 8 damage per tick, and can hit up to 19 times.
	+ Multiple lasers cannot hit the same enemy simultaneously.
	+ The lasers cannot damage Isaac.

## Notes

* The lasers created by Brimstone Bombs can push other bombs, including Troll Bombs and bombs placed by Isaac.

## Synergies

* / : Inherits the effect in full, firing lasers every time they explode.
* / : Attacks have a small chance to trigger this effect. Chance goes up to 100% at 30 luck.
* : Enemies hit by the sneeze will gain a curse that increases the damage the Brimstone lasers deal to 19 damage per tick. Enemies who die to the Brimstone lasers under the curse will damage and spread the curse to nearby enemies.
* / : The lasers can create Blue Flies when they deal damage.
* : Activating Kamikaze! sends Brimstone lasers in all 4 directions.
* Red Locusts / : Explosions made by the red locusts and tiny bombs create thinner lasers that deal 4.8 damage per tick instead of 8.
* : Placing Multidimensional Baby in front of the beam will transform it into two black-and-white beams.

## Interactions

* : Only the center explosion will fire lasers.
* : The lasers fired by the troll bombs will push other troll bombs around, likely to the edges of the room.
Brittle Bones

This article is about **Brittle Bones**, similar in appearance to Compound Fracture.
**Brittle Bones** is an unlockable passive item added in *The Binding of Isaac: Afterbirth † (Booster Pack #5)*.

## Effects

* When being picked up:
	+ Grants 6 empty Bone Hearts.
	+ Removes all Red Heart Containers. Does not remove existing Bone Hearts, but does empty them.
* Upon losing a Bone Heart, including ones acquired from other sources, Isaac fires a ring of 8 bones that split into more bones.
	+ Each Bone Heart lost adds a permanent +0.5 tears up.
	+ Each Bone Heart lost adds a permanent +0.4 fire rate, which can break the tear fire rate cap.
	+ Each bone does twice Isaac's damage plus a flat 22 damage; split bones do half this amount.

## Notes

* Picking this item up as  The Lost or  Keeper will give a one-time +0.5 tears up ( +0.4 fire rate). This bonus is retained even if the item is later lost or rerolled.
	+ Keeper will also gain 24 Blue Flies.
* The tears up bonuses gained through this item will persist in the escape sequence of Mines II.
* Losing Bone Hearts through a Devil Deal will not give the tears up effect.
* If Brittle Bones is removed (such as by reroll effects like the  or by being dropped by  Tainted Isaac), its tear upgrades will not be removed.

## Synergies

* ???: Brittle Bones will not get rid of ???'s Soul Hearts, and considering he can't fill the Bone Hearts, he can break them, giving him lots of tears ups without any downsides. However, having more than 6 Soul Hearts will get rid of the other Soul Hearts to put in the Bone Hearts.
* : The empty Bone Hearts will trigger Empty Vessel's effects.

## Trivia

* "Everything hurts" may be a reference to an achievement of the same name from the video game Nuclear Throne.

## Gallery

* Concept art for Brittle Bones on the left side, along with other Booster Pack items and trinkets, by Edmund McMillen.
Crystal Ball

**Crystal Ball** is an activated item.

## Effects

Upon use, it:

* Reveals the floor layout and all special rooms except the Super Secret Room and Ultra Secret Room.
* Drops either a Soul Heart or a random card or rune. (50% chance of either)
* While held, increases the chance of finding a Planetarium by 15%, or 100% if a treasure room has been skipped.

## Notes

* Crystal Ball can be obtained by playing a Fortune Telling Machine.
	+ It's possible to get more than one Crystal Ball from Fortune Telling Machines on a single run.
* The map revealing effect will not work if the Curse of the Lost is active.
* The Planetarium bonus guarantees the level generation to *attempt* placing one, but the level layout may not have enough room. Read the article on Planetariums for further details.

## Synergies

* : Wisps have much greater health than normal wisps. Tears that are fired from the wisps will auto aim towards nearby enemies, similar to .

## Interactions

* : The chance to drop cards or runes will change to 90%/10% in favor of Soul Heart.

## Trivia

* The reflection of a face can be seen on the crystal ball's surface. It is easier to make out on the 3DS lower screen icon.

## Unlockable Achievements

* The Planetarium - Collect any 3 items with the 'stars' item tag in a single run.

## Gallery

* 3DS The icon of Crystal Ball as seen on the lower 3DS screen.
Collection Page (Repentance)

The table below is a re-creation of what each page looks like when *The Binding of Isaac: Repentance* is installed and all 717 obtainable items have been acquired.

## Pages

*(Click images to open the corresponding item page)*

## Notes

* 3 other items are not on the collection page, because they can't be found naturally but still contribute to the total item count on the stats page:
	+ is excluded due to only being obtainable via .
	+ is excluded because it's an exclusive starting item.
	+ G FUEL! is not in the collection page because it is exclusive to daily challenges and a special seed.

## Trivia

* The item order is based on the original *The Binding of Isaac* up to item 129 (), and its expansion, *Wrath of the Lamb*, up to item 195 ().
Colostomia

**Colostomia** is a boss introduced in The Binding of Isaac: Repentance that can appear in Dross.

## Behavior

### Phase 1

Colostomia alternates between the following attacks:

* Hops in place and then slides toward Isaac in the closest cardinal direction, firing projectiles in both perpendicular directions as she moves and leaving trails of explosive gas.
	+ The slide can be at a slight angle if Isaac isn't perfectly aligned with it.
	+ Colostomia continuously performs this attack until ~40% of the room is covered in explosive gas.
* Launches a  Bomb towards Isaac that ignites any gas clouds its explosion hits, causing a chain of explosions.
	+ This is always her first attack upon spawning.
	+ Unlike Isaac's Butt Bombs, these do not fog the room.

### Phase 2

After dropping to half health, the bag containing Colostomia explodes, creating explosive clouds and leaving her adhering to the floor.

* Jumps to another nearby location, firing 8 projectiles in a radial burst and creating a puddle of harmful Brown Creep where she lands.
	+ Only 2 puddles of Brown Creep can persist at once.
* Spits two  Bombs at Isaac. The range of these bombs is dependent on how close Isaac is to her.
* Farts, creating a ring of explosive gas around her location.

## Gallery

* Colostomia in-game.
* Colostomia in her second phase.

## Trivia

* Colostomia is based on a Colostomy bag, a removable, disposable bag that attaches to the exterior opening of a colostomy to permit sanitary collection and disposal of bodily wastes.
* Colostomia is also spanish for colostomy.
* Colostomia's 1st phase charge attack is similar to an attack from The Witness in Antibirth.
* Colostomia is confirmed female according to messages from NotYourSagittarius in the official Binding of Isaac Discord.
* Upon death, Colostomia diffuses into the water of the arena, turning it from green to a murky brown.

## References

1. ↑ https://discord.com/channels/123641386921754625/485133685881045014/831359954337136670
Cursed Penny

**Cursed Penny** is an unlockable trinket added in *The Binding of Isaac: Repentance*.

## Effects

* Teleports Isaac to a random room upon picking up a coin.

## Notes

* The effect can teleport Isaac to any room aside from an undiscovered Ultra Secret Room.

## Interactions

* : The teleport effect is removed, rendering Cursed Penny useless.
* Golden Trinket / : No effect.