recursal/Fanatic-Fandom huggingface dataset:
Cricket Leg

**Cricket Leg** is an unlockable trinket added in *The Binding of Isaac: Repentance*.

## Effects

* Has a chance to spawn a random locust when killing an enemy.

## Synergies

* : Red locusts explode in a small horizontal cross-shape pattern.

* : Red locusts will shoot out four brimstone beams in a + formation after hitting an enemy.

* : Red locust explosions have a chance to spawn pickups or trinkets.

* : Increases locusts' size and doubles their damage.
	+ Red locusts’ impact damage is doubled and the explosion damage is increased to 85.

* : Red locusts fire a ring of ten tears outward upon detonation, which are affected by Isaac's tear modifiers, and deal damage equal to 15 + 0.6x, where x is Isaac's Damage.

## Interactions

* Ace Cards: Enemies that are turned into pickups don’t spawn locusts.
* /: Enemies that are turned into poop don't spawn locusts.

## Trivia

* Despite this trinket's name, as well as the locusts' in-game appearance, real life locusts are "the swarming phase of certain species of short-horned grasshoppers".
Dad's Lost Coin

**Dad's Lost Coin** is an unlockable passive item added in *The Binding of Isaac: Afterbirth †*.

## Effects

* +1.5 range.
* +2.5 range.
* +1 tear falling speed
* Drops a Lucky Penny.

## Trivia

* The item may refer to Sobriety Coins, which are given to members of the *Alcoholics Anonymous* organization to commemorate how long a member has remained sober.
	+ This is further supported in the item's The Binding of Isaac: Four Souls rendition, which closely resembles the most common design of Sobriety Coin.
	+ This is also supported by the dialogue during the Ascent, where at one point Mom mentions that Dad has a drinking problem.
	+ This was confirmed by Edmund in the Four Souls Isaac lore stream. He went on to say it was inspired by his own father, who is a recovered alcoholic/drug addict, and gave Edmund one of his first sobriety chips as a gift.
Cracked Crown

### Unlock Method

 Get a 5-win streak in the Daily Challenges (they don't have to be consecutive days, only the runs you play are counted)

**Cracked Crown** is an unlockable trinket added in *The Binding of Isaac: Afterbirth †*.

## Effects

* -20% tear delay (increased rate of fire)
	+ Since this directly affects tear delay instead of changing the tears stat, it allows Isaac's rate of fire to go over the normal maximum rate.
	+ Tear delay decreases are more noticeable and are a greater increase to DPS when the tears stat is high.
* Boosts speed, range, shot speed, damage, and  tears if they are above their base values.
	+ Affects stat bonuses from passive items, trinkets that are absorbed or in a second trinket slot, and permanent bonuses given by items such as .
	+ The extra stat upgrades are 33% of any final stat calculations over its base value (which is equivalent to  Isaac's base stats), for example with 4.5 damage, it is 1 damage over the base 3.5, and the 1 damage gets buffed to 1.33, ending up with a total of 4.83 damage.
	+ The extra stat upgrades are 20% of any final stat calculations over its base value (which is equivalent to  Isaac's base stats), for example with 4.5 damage, it is 1 damage over the base 3.5, and the 1 damage gets buffed to 1.2, ending up with a total of 4.7 damage.
		- Fire rate multipliers change what is considered to be the base value, so with , only tears ups above 15.00 will gain a bonus.
			* The only exception is , which gains a bonus to its 1.2x fire rate multiplier if it's above base.
		- Direct fire rate modifiers like  do not get a bonus.

## Notes

* The trinket does nothing for the listed boostable stats if they are at or below the base value; the boost is calculated on the *total* bonus, not per item.
* Luck is not affected by Cracked Crown.
* Speed will not exceed 2.0.

## Synergies

* : Each copy stacks granting a higher stat boost per stack.
* Golden Trinket: Stat boost is increased to 40%.
* : The tear delay reduction rises to 36%, and the stat boost is increased to about 77%.
	+ Stat boost is increased to 40%.

## Trivia

* This achievement was initially bugged on release of Repentance and would not unlock correctly. Fixed as of V1.7.6.
Brown Cap

**Brown Cap** is a trinket added in *The Binding of Isaac: Afterbirth*.

## Effects

* Destroying Poops causes them to explode, dealing  60/ 100 damage like a normal bomb, but with a shorter range.

## Notes

* Poops are not affected by bomb modifiers.
* Red Poops will not explode when destroyed.

## Synergies

* / Golden Trinket/: Each effect/trinket copy stacks adding another 60/100 damage to the explosion per stack.

## Interactions

* / : Dips do not explode.
* : No effect.
Cartridge

**Cartridge** is a trinket.

## Effect

* Grants about a 5% base chance to trigger  effect upon taking damage.

## Synergies

* Golden Trinket / : Multiplies the base chance of triggering the  effect upon taking damage.

## Notes

* The activation chance depends on the luck stat and goes up to 100% with 38 Luck.

## Trivia

* The Cartridge resembles an NES (Nintendo Entertainment System) cartridge.
* The art depicted on the cartridge is a picture of Isaac, implying that it is a copy of The Binding of Isaac in the form of an NES game.
Chaos

### Collection Grid

*(page 4, column 17, row 2)**(page 4, column 17, row 2)**(page 4, column 18, row 2)*

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

## Effects

* Drops 1-6 random pickups around Isaac.
* Causes items to be chosen from random item pools.
	+ Fixed item drops that ignore the current room's item pool will not be replaced. Examples include  after defeating one of The Harbingers as a floor boss, or  after breaking a Tinted Rock.

## Notes

* When playing Greed mode, items that are available only in the normal game will still not appear despite Chaos; the modes' different item pools stay separate.
* As the item does not mix or combine item pools, it is possible to deplete smaller item pools and end up with  before all items in the game have been taken.
	+ Thus, if Chaos tries to pull from an item pool that is already depleted, it will not pull from a different pool and instead give Isaac Breakfast.
		- As many Greed Mode item pools are small, Chaos tends to result in Breakfast more often during Greed mode.
* Chaos will draw items even from item pools that are not used in the game, but defined in the game's files. The unused pools are `bossrush` containing nearly all bomb related items, `challenge` with a smaller selection of bomb items and `dungeon` containing several Mom related items and food items.
* Since all item pools have the same probability of being selected, bomb-related items are much more common due to the Bomb Bum, `bossrush` and `challenge` item pools.
* Each pool has a weight based on the number of items in the pool. Items from large pools such as Treasure Room, Shop, and Boss are very likely, while items from small pools like Bomb Bum and Planetarium are more rare.
* If an item outside of the Devil Room pool appears as a Devil Deal, it will always cost 1 Red Heart Container (or 3 Soul Hearts should Isaac have no Red Hearts).
	+ If an item from the Angel Room pool appears as a Devil Deal, it will cost 2 Red Hearts if it would cost 30 cents in the Angel Shop generated by , and 1 Red Heart if it would cost 15 cents in the Angel Shop.
		- Similarly, if an item from the Devil Room pool appears in an Angel Shop generated by , it will cost 30 cents if it would cost 2 Red Hearts as a Devil Deal, and 15 cents if it would cost 1 Red Heart as a Devil Deal.
* If an item that grants an Eternal Heart is taken in a devil deal, the eternal heart will *not* keep Isaac alive if he has no other hearts.
* Bosses defeated in The Void drop items as if Chaos was active. Re-rolling the items uses the Boss Room pool as normal.

## Interactions

* : Ignores Chaos's effect and always picks items from the normal Devil Room pool, even on Greed Mode.

## Trivia

* The item's sprite is a Symbol of Chaos.
* The character appearance is similar to the "Trollface".

## Gallery

* The Forgotten gains a unique appearance from Chaos. Rather than the troll face grin, The Forgotten's grin is larger, and the smile is even across both sides of his face.
* Keeper gains a unique appearance after picking up Chaos. It gains a Forever Alone face, instead of the usual Troll face grin.
Crown (Disambiguation)

**Crown** can refer to any of the following

## Collectibles

* A passive collectible that gives isaac a 2x damage multiplier at full health
* A passive collectible that gives Isaac a boost to his tears at exactly one red heart of health
* A passive collectible that makes all future items cycle between 5 different items

## Trinkets

* A trinket that cause item rooms to spawn in The Womb
* A trinket that exaggerates Isaac's stat boosts
* A trinket that replaces item rooms with Devil Deals
* A trinket that causes an item room and shop to spawn in The Cathedral
* A trinket that causes an item room and shop to spawn in Sheol
Broken Modem

**Broken Modem** is an unlockable passive item added in *The Binding of Isaac: Afterbirth † (Booster Pack #1)*.

## Effects

* Enemies, enemy shots, tears and pickups will briefly freeze in place at random intervals.
	+ The frequency of the effect depends on Isaac's luck.
	+ Frozen enemy shots will disappear.
* Has a 25% chance to duplicate the room drop, similar to .
	+ Unlike the Contract, the Broken Modem cannot double chests, pills or cards.
		- However, it *can* duplicate chests that are an alternate reward from . These chests will have different contents from each other.

## Synergies

* + : If Broken Modem duplicates a chest that was spawned by Options?, using Magneto to immediately open the chest while in its glitched form will create a  item if the chest contained an item.

## Interactions

* : Contract from Below spawns two items, Broken Modem has an independent chance to duplicate each one.
* Friendly enemies: Broken Modem also affects friendly enemies and projectiles created by them.

## Note

* If Isaac exits the room before the glitching animation is completed on the loot, it will not be duplicated.

## Gallery

* Broken Modem's appearance prior to Booster Pack #4.

## Trivia

* Broken Modem is based on this Steam Workshop item by freeze.
* Broken Modem is a reference to an internet modem/box. Since the internet box is broken, there is a large amount of lag, as the client (player) computer is having trouble getting the data from the host server over the stuttering internet. This shows itself in the item through the following effects:
	+ The client computer has trouble getting the inputs of other players over the broken internet, meaning the other clients freeze in place and look like they aren't moving, as the computer isn't getting the inputs fast enough to show them. (slows enemies, items, and tears)
	+ The client computer gets the host's or other clients' inputs twice, as the client computer can't send the acceptance trigger to the host server fast enough. (double items)

## References

1. ↑ https://www.youtube.com/watch?v=GxyN17EGJH8
Clog

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

## Behavior

Clog remains stationary generally in the center of the room but can rarely be encountered at the center top of the room. It performs the following attacks:

* Spits out a Drip below it and can occasionally repeat this attack multiple times with a maximum of 4 Drips alive at once.
* Creates three lines of farts that spread across the room, knocking away Isaac and Drips. Each fart has a chance to spawn a Poops.
	+ 1-2 Corny Poops are spawned in this attack.
* If there are 2 or more Drips alive, Clog spins and causes the water in the room to circulate around him, catching Isaac and any spawned Drips in its current.
* Shoots out 4 spiraling lines of projectiles.
	+ Consists of either slow projectiles with small gaps in between or fast projectiles with bigger gaps in between.
* Upon Clog's defeat, he and all remaining Drips are "flushed" away identical to the effect of using  on them.

## Notes

* If a  Bomb goes off in the same room as Clog, it heals him.
* kills Clog instantly and causes him to leave behind 6 Dips.
* Like other water-based effects in the Dross floor, Isaac is unaffected by Clog's spinning attack if he has flight.
	+ This is particularly useful if fighting Clog in the mirror world, as Isaac will be  The Lost for that fight.

## Trivia

* Clog appears to be a boss version of a Splurt.
* A clog is a blockage in a toilet and/or its drain pipes.
	+ This is further referenced in Clog's death animation, where he gets flushed into the floor.
* Clog has many similarities to Brownie, though it is unknown whether or not they are truly connected.
	+ Clog's "voice" is the same as that of Brownie, albeit pitched down.
	+ Clog has buck teeth, just like Brownie.
	+ Clog and Brownie are both large, round balls of poop.
Crow Heart

**Crow Heart** is an unlockable trinket added in *The Binding of Isaac: Afterbirth †*.

## Effect

* Red Heart damage will be taken before Soul Heart, Black Heart, and  Rotten Heart damage.
	+ With Bone Hearts, Red Hearts contained within the Bone Hearts will be taken before regular Red Heart damage, but the Bone Hearts will not be fully depleted.
	+ If Isaac  only has half a Red Heart left /  has no Red Hearts left, Soul and Black Heart damage will be taken, and Bone Hearts can be destroyed.

## Notes

* This is useful for getting into Boss Challenge Room when you want to maintain your Soul/Black Hearts but have more than one filled Red Heart container.
	+ Does not work anymore since you need a health total of 1 Heart or less instead of a Red Heart total to enter Boss Challenge Rooms.
* Red Heart damage taken via the trinket affects your Devil Room/Angel Room chances normally.
	+ As a result, this trinket makes Soul/Black Hearts useless at protecting Devil/Angel Room chances.
	+ Since Bone Hearts are emptied before regular Red Hearts, this makes them very valuable to protect your Devil/Angel room chances.
* This is useful when playing as  The Forgotten, as it will preserve his Bone Hearts (and Devil/Angel Room chance) until all of his Bone Hearts are empty.
	+ This trinket does nothing while controlling  The Soul.
Candler

### Found In

**Candlers** are an enemy added in *The Binding of Isaac: Repentance*. They fly around the room, bouncing off walls, and spawn flames beneath them.

Sometimes, they can spawn alongside The Haunt.

## Trivia

* The Candler first appeared in the *Antibirth* mod.
* Candlers resemble Lil' Haunts with the face of The Haunt when it is in its second phase.
Butt Bombs

**Butt Bombs** is a passive item.

## Effects

* Gives the player 5 Bombs.
* Bombs now cloud up the screen on detonation, briefly confusing and dealing 10 damage to all enemies in the room.
* This item belongs to the  set. Collecting three items from this set will transform Isaac into a walking pile of poop.

## Notes

* Butt Bombs heal Turdlings, Dingle, Dangle, Brownie and  Clog by 25% of their maximum HP.
	+ The Butt Bomb effect on  or  does not cause healing, but normal bombs still do.

## Trivia

* This item is used in High Brow (challenge #2), Beans! (challenge #13), and  Scat Man (challenge #36).
Card Reading

**Card Reading** is a passive item added in *The Binding of Isaac: Repentance*.

## Effects

* At the beginning of each floor, spawns 2 portals that each lead to either the Boss Room, Treasure Room, or Secret Room.
	+ The Boss Room portal is red, the Treasure Room portal is yellow, and the Secret Room portal is blue.
	+ On floors with no treasure rooms, only 1 portal will spawn.
* The portals will disappear once the starting room is left, whether a portal was taken or not.

## Notes

* Assuming that each portal has an equal chance of spawning, before chapter 4, each portal has a 2/3 chance of a portal of a specific color to appear. From chapter 4 onward, there's a 1/2 chance of either color spawning.
	+ In challenges without treasure rooms, only 1 portal will spawn on each floor.
* During the Ascent, the portal will spawn in the "starting room" that leads to the next floor.
* Entering the starting room in the Mirrored world will cause the portals to spawn there, leading to the mirror's treasure, secret, or boss room.
* If the run is exited, the portals will not be there upon continuing.
* In The Void the boss portal will lead to a random boss, not necessarily Delirium.
* Entering a portal with Curse of the Maze active on the current floor has a chance of teleporting Isaac to a random room instead.
* The Treasure Room portal will not lead to a Planetarium if available, unlike .

## Interactions

* : Makes a second portal spawn in Chapter 4.
* /: Makes a second portal spawn in Chapter 5, if on the respective floor.

## Trivia

* Fittingly, this item's sprite is a combination of  and .
* This item may be a reference to the portals in the videogame Wizard of Legend, where four portals appear after clearing the boss room, that teleport you to important locations (shops or the start point) depending on their color (red, green, purple, and turquoise).
* The subtext "A link to your future" is very likely a reference to the game *The Legend of Zelda: A Link to The Past*.
* Card Reading is twice as unlikely to appear as most other Shop items, and is the only Shop item which acts this way that cannot be obtained from a different item pool.
Collection Page

The **Collection Page** can be found under "Items" In the "Stats" menu. It shows all the items that have ever been picked up on that save file.

## Notes

* The following will **NOT** count as picking up items and therefore doesn't add entries to the collection grid:
	+ Items which are intrinsic to a character and can't be rerolled.
	+ Any item interaction during seeded runs.
		- Certain special seeds do not disable the addition of entries.
		- Daily runs count as seeded runs.
	+ Any item interaction during challenge runs.
	+ Any item interaction during Victory Laps.
	+ Item wisps created with .
* Afterbirth changed the grid size of pages from 10x10 to 20x6.
* Gaining items via  and  counts towards the collection grid, even if the items have not been unlocked yet.
* Trinkets are not on the collection grid,  except for .
Compound Fracture

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

## Effects

* Tears turn into bones, which shatter into 1-3 shards upon hitting an obstacle or enemy, which each deal 50% of Isaac's Damage.
	+ Unlike , there is no damage minimum on splitting, but the tears can also split only once.
	+ The shards have a fixed size, about the same as a 3.5 damage tear, regardless of their Damage.
* +1.5 Range.
* +1.0 Tear Falling Speed.

## Synergies

* : The bomb will break into 1-3 more bombs which are launched in random directions from the point of impact.
* : Fetuses are skeletons that shoot splitting bone fragments when in contact with an enemy.
* /: Each tear splits into more tears, which will all shatter.
* : Tears will sometimes burst into smaller tears when hitting obstacles or enemies. These smaller tears are miniature versions of Haemolacria tears, which will burst when hitting the ground.
* : If the bone tear hits a wall or an obstacle, it will split into explosive half-damage shards. Hits on enemies and the floor behave as normal Ipecac.
* : Tear turns into a spinning bone that rapidly spews out smaller bone shots on contact with enemies.
* : First bullet shatters into smaller kidney stone bullets
* Spectral tears: Bones pass through obstacles and generate shards for each obstacle they pass through, which can result in many shards being generated from a single bone.
* : The bone fragments will be connected by the electric current.

## Interactions

* : Bone tears will hover until released but bone shards will travel normally.
* : Overrides Compound Fracture.
* : Overrides Compound Fracture.
* : Overrides Compound Fracture.
* : Bone tears will bounce when they are fired, however, bone shards will not bounce when they travel.
* The Forgotten: Smaller bone shots appear whenever an enemy is hit with the melee attack.  The bone toss is unaffected.
	+ Bone toss attack also creates bone tears.
* : Bone tears can be fed and will burst into split tears. Bone tears will burst into bone shards when hitting obstacles or enemies which can also be fed and burst into split tears and bone shards yet again. When bone shards are fed, they turn back into bone tears which can repeat this process again and again.
* : Overrides Compound Fracture.
	+ Knife will occasionally spawn bone fragments.
* : Tears turn to bones, but bones do not shatter.
	+ Tears hitting enemies will both shatter and bounce simultaneously.
* /: Overrides Compound Fracture.
* : The laser is not affected, but bone tears still shoot from Isaac's left eye.
* : Bone tears will not burst into bone shards when fired at obstacles, however, bone tears will burst into bone shards when fired at enemies.
* : Beams will only burst when hitting obstacles.

## Trivia

* The item is a reference to a compound fracture, a medical condition where a bone breaks and is exposed through the skin.
Bumbino

Degraded Boss

**Bumbino** is a boss added in *The Binding of Isaac: Repentance* that can appear in all environments of Chapter 2 (Caves, Catacombs, Flooded Caves).

## Behavior

Bumbino slowly moves towards Isaac and can perform the following attacks:

* Swipes forward to clear a path to Isaac if Bumbino is obstructed by obstacles while chasing him.
* Performs two swipes, one in Isaac's direction, followed by another swipe in the opposite direction; these swipes can break obstacles. Then slams the ground, releasing 8 rock projectiles in all directions as well as 4 rock waves diagonally.
	+ If Bumbino hits a wall or a pit with a swipe he is momentarily stunned, interrupting this attack and causing rock projectiles to fall from the ceiling.
	+ His swipe attack will also deflect incoming projectiles.
* Charges in Isaac's direction when vertically aligned with him and a wall, breaking all obstacles caught in his path. Bumbino will become stunned upon impacting the wall, launching a cluster of rock projectiles in the opposite direction and causes rock projectiles to fall from the ceiling.
	+ If Isaac is close to the impact, he is pushed away.
* Launches a  Bomb in Isaac's direction.

All of Bumbino's attacks deal 1 Heart of damage.

Additionally, Bumbino attempts to pick up any dropped Coins, similar to Ultra Greed, but without the healing.

* He prioritizes picking up coins on the ground over attacking.
* He cannot pick up Sticky Nickels, but will try indefinitely if one should spawn in the room, effectively anchoring him to one spot.
* Getting hit by Bumbino's swipes may sometimes cause Isaac to drop coins.
	+ Isaac will drop coins even if he's immune to damage through any means. This includes  Tainted Forgotten's skeleton.
* If Bumbino picks up 12 cents worth of coins, he drops an extra item from the following list and then leaves the room:

## Trivia

* Bumbino is based on , an item in-game and the main character in *The Legend of Bum-bo*, another game developed by Edmund McMillen in 2019.
* All items dropped by Bumbino reference the gameplay symbols from *The Legend of Bum-bo*: Pee, Poop, Hearts, Bones, Snot, and Teeth.
* The name "Bumbino" is a portmanteau of "Bumbo" and "Bambino", the Italian word for child.
* Bumbino's slam attack may be a reference to the *Wario Land* games, as he slams with his shoulder forward, mimicking Wario's Shoulder Bash move.
* Bumbino's voice is noticably deeper pitched than Bumbo's from *The Legend of Bum-bo*, despite resembling him.
* Bumbino's ingame face resembles the Newgrounds emoticon "Agnry Faic", which is also represented as a Co-op Baby called Boss Baby.
* Taking  as Keeper will give him an expression resembling Bumbino.
* Bumbino does not have a sprite for his delirium form.
Brown Nugget

**Brown Nugget** is an unlockable activated item added in *The Binding of Isaac: Afterbirth †*.

## Effects

* Spawns a stationary fly turret that shoots at enemies up to 3 tiles away
* The flies are completely invulnerable and ignored by enemies.
* The flies deal 2 damage per shot.
* The flies deal 3.5 damage per shot.
* This item belongs to the  set. Collecting three items from this set will transform Isaac into a walking pile of poop.

## Notes

* A maximum of 35 flies can be spawned in one room.
* A maximum of 64 flies can be spawned in one room.
* Flies spawned by Brown Nugget as  Tainted Lazarus will disappear when flipping to his other form, and will not reappear when flipping back.

## Synergies

* : Spawns brown wisps on the middle ring. These wisps shoot 3 times faster with 1/3rd of the damage of an average wisp. The wisps automatically shoot at nearby enemies instead of in the direction Isaac shoots. The wisps do not persist between rooms.
* : Two flies will be spawned instead of one.
* : Flies are larger, but do not deal increased damage.
* : Flies are larger and deal double damage.
* : No effect.
* : Flies are larger and deal double damage.
* : Spawned fly turrets count as familiars for sacrificing; although dropping the Brown Nugget will despawn the last fly turret, older ones will remain and can be sacrificed.
* Spawned fly turrets count as regular blue flies for sacrificing, and thus are converted to pennies.

## Trivia

* Brown Nugget was originally an unofficial item which was supposed to showcase the modding capabilities of Afterbirth+ in the PAX 2016 livestream. However, all items included in the demo were later added to the final game.
Turbo!

Turbo! is the third challenge on the list added on Antibirth; it is unlocked along with Cain, which is also the character on this challenge.

The game plays the same, but at a really high speed and your goal is to defeat Mom and doing so unlocks the Rune of Fehu.

## Strategy

This is essentially a common Antibirth playthrough as Cain with shops, treasure rooms same starting items.

***EVERYTHING*** goes faster, the game itself runs at a higher speed including animations, sequences, the timer, Temporary effects.

* Cain's already high speed makes him somewhat hard to maneuver, but the bigger issue is reaction time and dodging incoming attacks and enemies.
	+ If you still cannot get used to the movement speed, consider reducing it a bit
	+ An early Bucket of Lard will reduce your speed and increase Cain's low health
* Don't rush through the rooms to seize the difficulty and dangers on each, trying to speedrun them will inevitably result in you bumping on harmful obstacles.
* Leaping enemies and spiders are a special menace since they reach high speeds and move suddenly, making them harder to predict.
* Protective items to shrug off hits and shrinking items to avoid hits are recommended.
* Items which speed down enemies like Spider Butt, The Hourglass or Stop Watch.
	+ In this version of the game, Stop Watch was still automatic and will trigger when entering a new room.
	+ Broken Watch also works, but only every forth room and have a chance to speed up the game.
* Items that petrifies in the room helps like Mom's Bra.
* Eraser is really useful to delete a troubling enemy like Hoppers/Leapers,
* Bosses like Krampus and The Bloat are a big threat due to how quick their attacks can be.
* The best strategy is getting accustomed to the speed by playing it over and over.

## Trivia

* Turbo! is the only challenge not to be ported from *Antibirth* to *Repentance*, likely due to its similarity to SPEED!.
Broken Glasses

**Broken Glasses** is an unlockable trinket added in *The Binding of Isaac: Repentance*.

## Effects

* 50% chance of adding an extra blind item in Treasure Room.
	+ When one of the items is taken, the other disappears.
	+ The extra blind items in Downpour, Mines, and Mausoleum and their alternate stages have a 50% chance to be revealed instead.

## Notes

* The effect includes instances where pedestal items would be replaced with something else, such as the Pica Run challenge. If there is not a blind equivalent, both items will simply be shown.
* Its effect can work on the same floor it was picked up on if the Treasure Room hasn't been entered yet.
* Works in both Treasure Rooms in  Greed Mode.

## Synergies

* : An additional visible item will be generated from the blind item.
* : Both items can be taken, but still need to be paid for, and one will remain blind if not on the alt path.

## Interactions

* : The second item will always be blind if not on the alt path.
	+ This doesn't apply to .
Cohort

### Found In

**Cohorts** are enemies resembling a giant Globin in the shape of Monstro. They act similarly to Monstro, and have the following attacks:

* Hops towards Isaac.
* Spits a ball of blood at Isaac, which creates a radial burst of 8 blood shots after a moderate distance.
* Coughs up a chaotic burst of shots at Isaac. This burst contains a Globin goo pile, which will regenerate and chase Isaac if not killed. This has a chance to be a Gazing Globin goo pile.
	+ This attack cannot create Globins if the Cohort currently has 4 summoned Globins. Other Globins in the room do not count towards this limit.
* Upon death, splits into four Globin goo piles.

## Notes

* If a Globin goo pile lands over non-solid ground e.g. over a pit or between a wall and obstacles, it is killed instead of spawning.

## Trivia

* The Cohort first appeared in the *Antibirth* mod.
* The eyeball that appears when it performs its splitting projectile attack resembles that of a Gazing Globin.
Circle of Protection

### Collection Grid

*(page 4, column 18, row 3)**(page 4, column 18, row 3)**(page 4, column 19, row 3)*

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

## Effects

* Surrounds Isaac with a large white halo.
	+ Once per second, the halo deals Isaac's Damage to all enemies currently inside it.
	+ Each enemy shot has a 30% chance to be reflected by the halo.
		- The chance is predetermined, and not affected by how long it is exposed by the halo.
		- The reflectable tears are reflected once they touch the middle line of the halo, and is converted into friendly purple homing tears that have Isaac's Damage and no other tear modifiers.
		- Projectiles that create other projectiles (e.g. Shady) do not create the projectiles once reflected.
		- Can reflect:
			* Explosive projectiles (e.g. from Gurgle), which do not explode once reflected.
			* Fireballs (e.g. from Crackle), which do not create lines of fire once reflected.
			* Fire projectiles (e.g. from Mega Satan).
			* Obstacles thrown by Polty or Kineti.
		- Does not reflect:
			* Lasers or beams.
			* Lines of fire from fireballs.
			* Projectiles from Big Bony, Coal Boy, Danny.

## Interactions

* Circle of Protection: Multiple copies of this item through sources such as  or  has no effect.

## Trivia

* Circle of Protection is based on a cycle of Magic: the Gathering cards of the same name, which similarly provide defensive effects to their wielder.
* Circle of Protection's in-game icon may be based on the band A Perfect Circle's logo. The pickup quote is also similar to the lyrics of their song Pet.
Computer Savvy

**Computer Savvy** is challenge #16. Start off with ,  and . The goal is to defeat Mom. This challenge is available by default.

## Difficulty

Due to the homing lasers setup given, this challenge is considered the easiest of all the challenges. The only problem you will encounter will be rocks and obstacles getting in the way of your lasers, but this is something most runs have to deal with anyway.

## Strategy

* Getting an item that can break obstacles like  or  will make the challenge trivial.
* Be aware of Isaac's position so lasers can be shot in the right direction to either get a direct hit or have it curve to hit enemies.
* Spectral tears, such as from  (found in Angel Rooms),  or  (both found in Devil Rooms), are also very helpful.

## Rewards

* Robo-Baby 2.0 - Complete **Computer Savvy (challenge #16)**.
Buddy in a Box

**Buddy in a Box** is an unlockable passive item added in *The Binding of Isaac: Afterbirth † (Booster Pack #1)*.

## Effects

* Grants a familiar with random tear effects, fire rate, and damage.
	+ The familiar's damage scales from ~2-6, and tear delay scales from ~12-30.
	+ The familiar takes the appearance of a random co-op baby.
	+ The familiar is randomized upon entering a new floor.
* This item belongs to the  set. Collecting three items from this set will transform Isaac into a three-faced version of himself.

## Notes

* The tear effects available are the same as on the  item.
* The familiar's tear appearance isn't linked to the normal effect such tears would have.
	+ For instance, piercing-looking tears might not go through enemies and  tears might not stick, while tears that do not look like  tears can still split on hit.
* Some tear effects like  and  do not have their associated stat boosts and thus are very ineffective.
* Familiars with the  effect can drop Black Hearts when an enemy is killed.
* Familiars will not do contact damage.
* Familiars that follow behind Isaac have a certain priority in how close their position is to him over other familiars, with Buddy in a Box having 5th priority.
* The familiar will change upon exiting the  area. (possibly a bug)

## Synergies

* : Spawns a new randomly generated familiar.

## Trivia

* Buddy in a Box is based on this Steam Workshop item by Ashkait and Scayze.
* This is the only way of seeing co-op babies in-game outside of co-op.
* The re-texture makes it look like a Funko Pop Figurine Box.
Bookworm

Upon picking up 3 book items from the following list ( 3 items with the `book` item tag), Isaac will fire tears out of both eyes simultaneously 25% of the time. This effect stacks with items such as ,  and , multiplying the number of tears.

The chance of firing double tears is not affected by Luck.

## Notes

* As  Jacob and Esau /  Tainted Lazarus, it's not possible to cycle between three books to give both characters the transformation's effect. Each character needs to pick up three different books, meaning six books in total.
* Unlike , the damage of doubled tears is not reduced. Each of the doubled tear shots does full damage.

## Trivia

* A bookworm is a person who's devoted to reading, especially books.
* is the only passive item to contribute to the transformation.
* Bookworm can be very easily attained by going into a Library.
Grimace

## Bomb Grimace

**Bomb Grimace** is an alternate version of Grimace that spawns Red Bombs for Isaac to use.

In the boss fight against the Tuff Twins, a couple of Bomb Grimaces will be found around the room to provide free explosives to use to defeat the boss.

## Quake Grimace

**Quake Grimace** is an alternate version of Grimace that periodically fires a rock wave in which ever direction it's facing. It does not stop, even if the room is cleared.

Great Gideon appears to be a large boss variant of a Quake Grimace.
Brother Bobby

**Brother Bobby** is a passive item.

## Effects

* Spawns a familiar that follows Isaac around shooting tears that deal 3.5 damage.
	+ Brother Bobby shoots once per second.
	+ Brother Bobby shoots 1.88 times per second.
* This item belongs to the  set. Collecting three items from this set will transform Isaac into a three-faced version of himself.

## Notes

* Brother Bobby is functionally identical to .
* Brother Bobby has a higher tear rate than , whereas Sister Maggy has increased damage.
* Familiars that follow behind Isaac have a certain priority in how close their position is to him over other familiars, with Brother Bobby having 5th priority.

## Trivia

* **Brother Bobby**, like  ???, is a reference to Edmund McMillen's older game *Dead Baby Dressup*.
	+ According to Edmund McMillen's first post-Repentance Lore Stream, Brother Bobby was added to the game before ???.
* This item is named after a baby doll that Edmund had as he was a child.
* This item is used in The Family Man (challenge #19) and  Blue Bomber (challenge #23).
* In the original game, the item  will turn one of your shooting familiars into Brother Bobby until the bottle is broken.
Callus

**Callus** is a trinket.

## Effects

* Prevents damage from creep and floor spikes.

## Notes

* Also grants immunity to slowdown from black and white creep, but not from Cobwebs.
* Does not prevent any damage from Curse Room doors.
* Does not prevent damage from Spiked Chests.
* Does not prevent damage from Greed mode's stop button.
* Does not prevent damage from Spiked Rocks.
* Prevents the use of Sacrifice Rooms, unlike flight.
	+ Can use Sacrifice Rooms now. Can also use the spikes created by .

## Trivia

* A callus is an area of thickened skin that forms as a response to repeated friction, pressure, or other irritation.
Charged Penny

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

## Effects

* Picking up coins has a chance to add one charge to Isaac's currently held Active Item.
	+ This chance is equal to 1/6th of the value of the coin, and cannot activate more than once per coin collected.

Chance per Coin
 Penny
 Double Pennies
 Nickel
 Dime

## Trivia

* This trinket used to be called Electric Penny in *Antibirth*, and had a different sprite. In *Antibirth*, it was always unlocked and nickels and dimes would proc the charge chance 5 and 10 times respectively.

## Gallery

* Charged Penny's counterpart from Antibirth.
Dad's Key

**Dad's Key** is an unlockable activated item.

## Effect

* Upon activation, opens all doors in the current room in almost all circumstances.

## Notes

* Dad's Key can open:

1. Any normal doors that are closed during combat, even on floors that normally disallow this;
2. Any dоor requiring Keys;
3. Any door requiring Bombs to blow open (including Secret Room and Super Secret Room doors);
4. Challenge Room and Boss Challenge Room doors regardless of health total;
5. The door to the Mega Satan arena;
6. The Boss Rush door from inside;
7. The doors of a Mini-Boss Room from inside;
8. Most Boss Room dоors from inside;
9. The Mausoleum / Gehenna doors without paying the health cost.

* Dad's Key cannot open:

1. The Boss Rush door if the timer has already passed 20 minutes;
2. The door to the room leading to ??? if the timer has already passed 30 minutes;
3. Angel Room or Devil Room doors;
4. Locked Chests of any kind, or Key Blоcks;
5. The door of Mom's Boss Room from inside;
6. The exit door in Greed mode;
	* Leaving the main room before clearing a set of waves will reset your wave counter, and repeated waves will not drop coins or charge your activated item.
7. The door to The Void during the Hush boss fight;
8. The flesh door leading to Corpse;
9. A Strange Door.

## Synergies

* : Creates wisps in the middle ring. If the wisps touch Locked Chests, Special Room doors, or uncleared room doors, they will unlock and open them, destroying themselves in the process. These wisps can open *any* locked door they touch, including the door to the Mega Satan arena,  A Strange Door, and the flesh door to Corpse. Bomb Chests and Mega Chests are unaffected. They will also donate to Key Masters on touch, destroying themselves in the process. Opening a chest in a Challenge Room with a wisp will *not* start the challenge.

## Gallery

* 3DS The icon of Dad's Key as seen on the lower 3DS screen.

## Trivia

* This item is used in The Family Man (challenge #19) and  Red Redemption (challenge #44).
* Dad's Key may be a reference to Isaac's father leaving his mother, as it can be used to escape from almost any conflict.
* In *Wrath of the Lamb*, this item was unlocked by beating ??? for the first time.
Caves

*(chapter 2)*

**The Caves** is the second chapter of Rebirth. The Caves' unlockable variants are the Catacombs and the Flooded Caves. It features more decayed enemies than the first chapter, with the main theme being worms and boils.

 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:*

 Fistula | 71.0
 The Hollow | 19.1

## Unlockable Achievements

* Lil' Chubby - Beat Chapter 2.

* Something Cute - Beat Chapter 2 30 times.

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

* Telekinesis - Beat Chapter 2 without taking damage.

* Spelunker Boy - Beat Chapter 2 without taking damage.

## Music

* The music in the caves is titled *Sodden Hollow*.
	+ The word "sodden" in the name is used to describe the damp, wet appearance of the caves.
D100

### Collection Grid

*(page 3, column 8, row 8)**(page 3, column 18, row 2)**(page 3, column 19, row 2)*

### Unlock Method

 Complete the Boss Rush as  The Lost

**D100** is an unlockable activated item.

## Effects

Upon use, it:

* Rerolls all passive items on Isaac (like the ).
* Rerolls all pedestal items in the room (like ).
* Rerolls all pickups in the room (like the ).
* Restarts the room and respawns all enemies (like the ).
* Rerolls Isaac's damage, tears, range and speed (like the ).
* Rerolls all monsters in the room into weaker ones (like the ).
	+ Doesn't go into effect in rooms the  works in.
* Rerolls all rocks in the room (like the ).
* Duplicates 1 random pickup in the current room (like the ).
	+ The pickup is rerolled by the  before being duplicated, essentially just granting a random extra pickup.

## Notes

* D100 is a special item.
* See the , , and the  to learn more about the respective individual effects.
	+ See the , , , , , , , and the  to learn more about the respective individual effects.
* If Missing No. is given to the player, it will activate and remove the D100, preventing further rerolls.
	+ Note that  can be re-rolled into, but can't be re-rolled out of.

## Synergies

* : Rerolls all of Isaac's wisps and gives him one random wisp. Book of Virtues will not be rerolled in the process.

## Gallery

* 3DS The icon of D100 as seen on the lower 3DS screen.
* Splash image which appears when D100 is activated.

## Trivia

* Unlike the base game sprite, the D100 sprite on the lower part of the 3DS screen appears to have no edges and is a perfect sphere, which would make it more akin to the .
Chemical Peel

**Chemical Peel** is a passive item.

## Effects

* +2 flat damage to tears fired from Isaac's left eye.

## Notes

* The damage bonus is unaffected by both positive and negative damage multipliers.
* Cain has a 50% chance of firing a shot with the effects of Chemical Peel whenever he fires.
* applies to the same eye and the effects stack.
	+ Generally every interaction and synergy that applies to Chemical Peel also applies to Blood Clot. See its page for any differences to what is listed here.

## Synergies

* //: Every other set of tears has the Chemical Peel effect.
* : The entire laser has a high chance to have the Chemical Peel effect, with no visual difference.
* : The damage bonus applies to every bomb, with no visual difference.
* : The missiles have a high chance to deal 40 points extra damage, with no visual difference.
* : All tears in the tear barrage will gain the Chemical Peel effect.
* : The tear flashes between normal and the higher-damaging Chemical Peel tear.
* : Each tick of the Knife's damage has a high chance to gain the bonus, with no visual difference.
* : Chemical Peel is unaffected by Soy Milk's damage down modifier, greatly increasing DPS.
* : Chemical Peel has a chance to apply to the laser, with no visual difference.
* : Lasers have a high chance to gain extra damage, with no visual difference.
* : Every tear fired has Chemical Peel applied to it, but the laser is unaffected.

## Interactions

* : Has a 50% chance of firing a shot with the Chemical Peel effect.
* : The last type of tear fired is used for the burst.
* : Gives a 50% chance of firing a Chemical Peel shot, similar to Cain.
* : Overrides Chemical Peel.
* : The last type of tear fired is used for the burst.

## Trivia

* Isaac's face looks similar to a Dople when this item is obtained.
Charged Baby

### Collection Grid

*(page 4, column 7, row 1)**(page 4, column 7, row 1)**(page 4, column 8, row 1)*

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

## Effects

* Spawns a battery familiar that, while the player is in an uncleared room, every 30 seconds, starting from the moment it has been picked up, does one of the following:
	+ Spawns a Lil' Battery. It does this a maximum of 2 times per room.
		- Can also spawn a Micro Battery or Mega Battery instead.
	+ Adds a charge to Isaac's activated item. It does this a maximum of 2 times per room.
	+ Petrifies all enemies for 1.3 seconds.
	+ Nothing.

## Notes

* Charged Baby becomes very powerful as  Lilith in Greed mode, as the duplicates will continue to spawn Lil' Batteries, leading to a huge chain of familiars.
* Familiars that follow behind Isaac have a certain priority in how close their position is to him over other familiars, with Charged Baby having the lowest priority at 6th and thus being farther from Isaac than familiars of different priorities.
* In an uncleared room, if Charged Baby familiar has reached the maximum of spawned batteries and/or added activated item charges, Isaac may re-enter the room (e.g. by bombing a closed door, having  or ) to reset Charged Baby's effect limits.
	+ This effectively allows farming for batteries and activated item charges, given the player's patience, ability to avoid enemies present in the room, and a way to re-enter the room indefinitely.

## Synergies

* : Familiar is bigger and drops Lil' Batteries more often. No effect on its other abilities.
Crack the Sky

**Crack the Sky** is an activated item.

## Effects

* Summons 5 beams of light in random locations on the ground. Each beam lasts for 0.8 seconds and deals large amounts of damage to enemies that touch them. They have a hitbox in a 3x3 cross shape.
	+ Each beam can hit the same enemy up to 8 times, and deals Isaac's tear damage plus a flat 20 damage per hit.
* The beams tend to gravitate towards the enemies, unlike the original game.
	+ The beams have a high chance to directly target enemies, unlike the original game.

## Synergies

* : Spawns wisps in the middle ring. The wisps summon a beam of light when touched, dealing 12 damage to nearby enemies in addition to their normal contact damage.

## Gallery

* The icon of Crack the Sky as seen on the lower 3DS screen.

## Trivia

* Conquest uses this ability to damage Isaac.
* Isaac also uses this ability to damage Isaac, only in a pattern and in a higher quantity of beams.
Bozo

**Bozo** is an unlockable passive item added in *The Binding of Isaac: Afterbirth † (Booster Pack #1)*.

## Effects

* +0.1 flat damage.
* Grants a Soul Heart.
* Enemies may randomly become briefly charmed or feared.
* Taking damage has a 5% chance to spawn Rainbow Poop.

## Notes

* None of the above effects are affected by luck.

## Synergies

* : Each half-heart lost has a chance of spawning a rainbow poop, allowing for full red heart regeneration.
* : Each use has a chance of spawning a rainbow poop.
* With max red hearts, , and careful timing to get the maximum healing from each rainbow poop, Isaac's effective health pool could be extremely high.

## Gallery

* Bozo's appearance prior to Booster Pack #5.

## Trivia

* Bozo is based on this Steam Workshop item by electoon.
* This item is a reference to Bozo the Clown, a clown character whose broad popularity peaked in the 1960s.
* The item's ability to inflict fear may be a reference to coulrophobia, the fear of clowns.
* If you die with Red Heart containers and enemies destroy the rainbow poop in time, your hearts will fill up again, still leaving you dead.
* This item shares a description with the item .
Broken Ankh

**Broken Ankh** is an unlockable trinket.

## Effects

* When held, Isaac has a 22.22% chance to be revived as  ??? in the previous room. Can occur multiple times in the same run.

## Notes

* Resurrection items activate in a set order. Broken Ankh is  7th /  9th in this order after , , ,  Lazarus' inherent extra life ( swap the order of the previous two), , , , and .
* This trinket isn't affected by Luck.
* Unlike , Broken Ankh will not display an extra life and question mark next to Isaac's hearts.

## Synergies

* Tainted ???: Revived as Tainted ??? instead of ???.