Blue Baby

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Font TeamMeat qmark.pngFont TeamMeat qmark.pngFont TeamMeat qmark.png
Character image
Full soul heartFull soul heartFull soul heart
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Damage Stat Icon.png Font TeamMeat D.pngFont TeamMeat a.pngFont TeamMeat m.pngFont TeamMeat a.pngFont TeamMeat g.pngFont TeamMeat e.png 3.5 (*1.05)
Tears Stat Icon.png Font TeamMeat T.pngFont TeamMeat e.pngFont TeamMeat a.pngFont TeamMeat r.pngFont TeamMeat s.png +0
Shot Speed Stat Icon.png Font TeamMeat S.pngFont TeamMeat h.pngFont TeamMeat o.pngFont TeamMeat t.png  Font TeamMeat S.pngFont TeamMeat p.pngFont TeamMeat e.pngFont TeamMeat e.pngFont TeamMeat d.png 1
Range Stat Icon.png Font TeamMeat R.pngFont TeamMeat a.pngFont TeamMeat n.pngFont TeamMeat g.pngFont TeamMeat e.png 23.75
Speed Stat Icon.png Font TeamMeat S.pngFont TeamMeat p.pngFont TeamMeat e.pngFont TeamMeat e.pngFont TeamMeat d.png 1.1
Luck Stat Icon.png Font TeamMeat L.pngFont TeamMeat u.pngFont TeamMeat c.pngFont TeamMeat k.png 0
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Starting Item Icon.png
Starting Item Icon.png
The Poop The Poop
??? Defeat Mom's Heart 10 times??????
Disambig.png This article is about the playable character. For the boss at the end of The Chest The Chest, see ??? (boss). For the floor, see ??? (floor). For the pill effect, see Pills.

???, also known as the Blue Baby, is a character unlocked by defeating Mom's Heart ten times. He starts with three soul hearts, and his health meter is unique in that he cannot gain red heart containers. If an item would grant him a red heart container (including an empty one), it adds a soul heart instead.

Unlockable items[edit | edit source]

Item & strategy notes[edit | edit source]

Positive[edit | edit source]

  • Abaddon Abaddon costs three Soul Hearts and grants six Black Hearts, damage up, fear shot, and no negative effects to ???. Abaddon can be bought safely regardless of current health, because its price can be deducted from the acquired Black Hearts retroactively.
  • Ankh Ankh is effectively a 1up! 1up! for ???.
  • Added in AfterbirthAthame Athame can be used to produce black hearts upon taking damage.
  • Balls of Steel pills or V - The Hierophant V - The HierophantPickup V - The Hierophant icon.pngSpawns 2 soul hearts. grant two soul hearts, both of which are more useful than normal HP up items.
  • Removed in Afterbirth The XI - Strength XI - StrengthPickup XI - Strength icon.pngGrants the effect of Magic Mushroom (increases all of Isaac's stats except tears), but adds one (temporary) heart container for the current room as opposed to a permanent one. card gives ??? a permanent soul heart.
  • Book of Revelations Book of Revelations Spawns soul hearts.
  • Ceremonial Robes Ceremonial Robes costs three Soul Hearts and grants three Black Hearts and damage up. Like Abaddon Abaddon, this item is always safe to take.
  • Added in AfterbirthCrown of Light Crown of Light will always activate.
  • Mitre Mitre and Daemon's Tail Daemon's TailTrinket Daemon's Tail icon.pngMost non-specific heart drops become black hearts, but heart drops are significantly less common. replace useless Red Hearts with Soul and Black Hearts respectively.
  • Dark Bum Dark Bum converts useless Red Hearts into Soul Hearts and spiders.
  • Dead Cat Dead Cat will set Soul Hearts to 1, but can be used to gain devil deals by sacrificing the extra lives.
  • Added in Afterbirth †Dim Bulb Dim BulbTrinket Dim Bulb icon.pngProvides a boost to all stats when Isaac's active item is completely uncharged. is able to be activated every room due to the single charge on The Poop The Poop, providing a consistent stat boost.
  • Gimpy Gimpy has a chance to spawn Soul Hearts when hit.
  • Lazarus' Rags Lazarus' Rags causes ??? to be resurrected as Lazarus Risen when he dies, allowing the gathering of Heart Containers. Once this happens, however, you are no longer playing as ???, and therefore cannot get any of his achievements/unlocks. The same effect happens with the use of Judas' Shadow Judas' Shadow.
  • Added in AfterbirthMaw of the Void Maw of the Void can produce black hearts.
  • Midas' Touch Midas' Touch makes The Poop The Poop create golden poop.
  • Monkey Paw Monkey PawTrinket Monkey Paw icon.pngIf the character has half a heart after taking damage, it drops a black heart. The effect can trigger up to three times, after which the trinket will disappear. will drop 3 black hearts, but must take damage for each one to spawn.
  • Petrified Poop Petrified PoopTrinket Petrified Poop icon.pngGreatly increases the chances of a pickup dropping when destroying poop. is useful early on to get more pickups from The Poop The Poop every room.
  • Pyromaniac Pyromaniac makes ??? immune to all explosions.
  • The Polaroid The Polaroid and The Negative The Negative always activate when taking damage.
  • The Relic The Relic, which is generally useful, is especially useful to ??? as it spawns Soul Hearts.
  • Satanic Bible Satanic Bible generates Black Hearts.
  • Added in AfterbirthSerpent's Kiss Serpent's Kiss can produce black hearts by poisoning enemies.
  • Squeezy Squeezy and Added in AfterbirthMr. Dolly Mr. Dolly increase ???'s tears and can grant soul hearts.
  • Whore of Babylon Whore of Babylon is always active.

Negative[edit | edit source]

  • Items that directly add Red Hearts to the health bar, such as Yum Heart Yum Heart or full health pills, are useless.
  • Blood donation machines and Devil beggars are riskier, as they deplete health that is harder to replenish.
  • If ??? has only one heart, Experimental Treatment Experimental Treatment has a chance to be lethal.
  • Cursed Skull Cursed SkullCollectible Cursed Skull icon.pngIf Isaac has less than one full red heart after taking damage, he will be immediately teleported to the last cleared room he was in. will automatically teleport ??? out of the room upon taking any damage, as he doesn't have any Red Hearts.
  • Added in AfterbirthGlass Cannon Glass Cannon will bring ??? down to half a soul heart, and not give back any health upon leaving a room due to ???'s lack of red hearts. This item essentially takes away most of the player's health in exchange for a single high damage tear.
  • Guppy's Paw Guppy's Paw, since requiring red hearts to convert, would be a useless item to hold (but should still be picked up and swapped back to get credit towards the Guppy transformation). Guppy's Paw may still be used to activate Broken Remote Broken RemoteTrinket Broken Remote icon.pngTriggers the Teleport effect whenever an activated item is used..
  • Judas' Tongue Judas' TongueTrinket Judas' Tongue icon.pngItems in the Devil Room only cost 1 heart. Soul heart trades still cost 3 soul hearts. doesn't lower the price of soul heart devil deals.
  • Little C.H.A.D. Little C.H.A.D. is useless unless paired with Dark Bum Dark Bum, where it becomes very useful.

Notes[edit | edit source]

  • Sleeping on a bed will give ??? three soul hearts.
  • Enemies who deal full hearts of damage can be very dangerous in the early floors of the game.
  • The Poop The Poop - While not the most useful item, it can allow ??? to cross small gaps by bombing the poop from the opposite side, much like one would for Rocks. Furthermore, in rooms with non-flying enemies that chase the player (except spiders), the poop can be used in a corner of the room making ??? untouchable, allowing the player to kill them without taking damage (if the player moves away from the pile of poop generated, this will no longer work).
  • Bone hearts grant an empty bone heart upon pickup, but they cannot be refilled using red hearts.

Trivia[edit | edit source]

  •  ??? appears in the original Binding of Isaac.
    •  ???'s unlock requirements in Rebirth are the same in the original Binding of Isaac.
  • The name "Blue Baby" had not appeared in the game itself until the Afterbirth expansion, with a co-op baby named as such.
  •  ???'s common nickname, Blue Baby, is a reference to blue baby syndrome, in which a baby's skin complexion appears blue from a lack of oxygen in its blood due to a congenital heart defect.
  • Many of Edmund's older flash games from Newgrounds feature ??? and Brother Bobby Brother Bobby. ??? was Edmund's mascot from 1996-2002.
  • In several cutscenes, Isaac is depicted suffocating inside a chest. ??? is first seen inside an identical chest, and is the follow up boss after Isaac. Blue skin tone is typically used to show suffocation, and X eyes imply that the character is either knocked out or deceased.
    • After death, the bowels of the deceased will loosen, causing them to defecate themselves. This is most likely the reason ??? starts with The Poop The Poop.
  • Unlike many of the other characters, ??? does not appear in the Bible or any religious scripture.
  • The Ankh Ankh will resurrect any character as ???, even before he is unlocked.
  • Although "Blue Baby" is considered an unofficial nickname for ???, the character is referred to by this name in some of the game's code. One example of this is the image file for the character, named character_006_bluebaby.
  •  ???'s look originally came from Dead Baby Dressup, one of Edmund McMillen's first Flash games.
  • ???'s starting health is listed as "-1" on the character selection screen.

Gallery[edit | edit source]

Mom's Heart Unlocks Mom's Heart Unlocks Mom's Heart Unlocks
A NooseA NooseDefeat Mom's Heart 3 timesA QuarterA QuarterDefeat Mom's Heart 8 timesA Fetus in a JarA Fetus in a JarDefeat Mom's Heart 9 times??????Defeat Mom's Heart 10 timesEverything Is Terrible!!!Everything Is Terrible!!!Defeat Mom's Heart 5 timesIt Lives!It Lives!Defeat Mom's Heart 11 timesWire Coat HangerWire Coat HangerDefeat Mom's Heart 4 timesIpecacIpecacDefeat Mom's Heart 6 timesExperimental TreatmentExperimental TreatmentDefeat Mom's Heart 7 timesRubber CementRubber CementDefeat Mom's Heart 2 timesDarkness FallsDarkness FallsDefeat Mom's Heart 11 timesSolar SystemSolar SystemDefeat Mom's Heart 3 timesSuicide KingSuicide KingDefeat Mom's Heart 11 timesDemo ManDemo ManDefeat Mom's Heart 9 timesLost BabyLost BabyDefeat Mom's Heart on hard mode as IsaacCute BabyCute BabyDefeat Mom's Heart on hard mode as MagdaleneCrow BabyCrow BabyDefeat Mom's Heart on hard mode as EveShadow BabyShadow BabyDefeat Mom's Heart on hard mode as JudasGlass BabyGlass BabyDefeat Mom's Heart on hard mode as CainWrapped BabyWrapped BabyRemoved in Afterbirth † Defeat Mom's Heart on hard mode as Azazel
Added in Afterbirth † Defeat Mom's Heart on hard mode as Lazarus
Begotten BabyBegotten BabyRemoved in Afterbirth † Defeat Mom's Heart on hard mode as Lazarus
Added in Afterbirth † Defeat Mom's Heart on hard mode as Azazel
Dead BabyDead BabyDefeat Mom's Heart on hard mode as ???-0- Baby-0- BabyDefeat Mom's Heart on hard mode as The LostGlitch BabyGlitch BabyDefeat Mom's Heart on hard mode as EdenFighting BabyFighting BabyDefeat Mom's Heart on hard mode as Samson
Goat Head BabyGoat Head BabyDefeat Mom's Heart on hard mode as LilithBlue WombBlue WombDefeat Mom's Heart 10 timesSuper Greed BabySuper Greed BabyDefeat Mom's Heart on hard mode as KeeperBlue BomberBlue BomberDestroy 10 tinted rocks and defeat Mom's Heart 11 times Pokey MansPokey MansDefeat Mom's Heart 11 timesSmelterSmelterDefeat Mom's Heart or It Lives! on hard mode as ApollyonBurning BasementBurning BasementDefeat Mom's Heart 11 timesMarrowMarrowDefeat Mom's Heart or It Lives! on hard mode as The Forgotten
Rebirth Afterbirth Afterbirth †
Isaac CharNav.pngMagdalene CharNav.pngCain CharNav.pngJudas CharNav.pngBlueBaby CharNav.pngEve CharNav.pngSamson CharNav.pngAzazel CharNav.pngLazarus CharNav.pngEden CharNav.pngLost CharNav.png Lilith CharNav.pngKeeper CharNav.png Apollyon CharNav.pngForgotten CharNav.png
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