Blue Baby

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Blue Baby App.png
Health Stat Icon.png Health HUD Soul Heart.pngHUD Soul Heart.pngHUD Soul Heart.png
Damage Stat Icon.png Damage 3.5(*1.05)
Tears Stat Icon.png Tears 1
Shot Speed Stat Icon.png Shot Speed 1
Range Stat Icon.png Range 23.75
Speed Stat Icon.png Speed 1.1
Luck Stat Icon.png Luck 0
Starting Items
Starting Item Icon.png Pickups None
Starting Item Icon.png Items The Poop The Poop
Unlocked By
??? Defeat Mom's Heart 10 times
Disambig.png This article is about the playable character. For the boss at the end of The Chest, see ??? (Boss). For the floor, see Blue Womb. 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, 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 Afterbirth Athame Athame can be used to produce black hearts upon taking damage.
  • Balls of Steel Pills or The Hierophant grant two soul hearts, both of which are more useful than normal HP up items.
  • Ceremonial Robes Ceremonial Robes costs three Soul Hearts and grants three Black Hearts and damage up. Like Abaddon, this item is always safe to take.
  • Added in Afterbirth Crown of Light Crown of Light will always activate.
  • Daemon's Tail Daemon's Tail replaces useless Red Hearts with Black Hearts.
  • Dark Bum Dark Bum converts useless Red Hearts into Soul Hearts and spiders.
  • 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 Afterbirth Maw of the Void Maw of the Void can produce black hearts.
  • Midas' Touch Midas' Touch makes The Poop The Poop create golden poop.
  • Mitre Mitre makes soul heart pickups more common.
  • Monkey Paw Monkey Paw will drop 3 Black Hearts, but must take damage for each one to spawn.
  • Petrified Poop Petrified Poop is useful early on to get more pickups from 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 Afterbirth Serpent's Kiss Serpent's Kiss can produce black hearts by poisoning enemies.
  • Squeezy Squeezy and Added in Afterbirth Mr. 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 Banks 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 Skull will automatically teleport ??? out of the room upon taking any damage, as he doesn't have any Red Hearts.
  • Dead Cat Dead Cat will remove all but one Soul Hearts. However, it can be used as a last resort if you are running very low on Soul Hearts.
  • Added in Afterbirth Glass 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 in order to get credit towards the Guppy transformation).
  • Judas' Tongue Judas' Tongue 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 (with the exception of 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).

Trivia[edit | edit source]

  •  ??? appears 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. ??? first appears 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 the some of the game's code. One example of this is the image file for the character, named 'character_006_bluebaby'

Gallery[edit | edit source]

Rebirth Afterbirth Afterbirth †

Isaac CharNav.png Magdalene CharNav.png Cain CharNav.png Judas CharNav.png BlueBaby CharNav.png Eve CharNav.png Samson CharNav.png Azazel CharNav.png Lazarus CharNav.png Eden CharNav.png Lost CharNav.png

Lilith CharNav.png Keeper CharNav.png

Apollyon CharNav.png

SmallIsaac.png The Binding of Isaac: Rebirth SmallIsaac.png

MainPageAchievements.png Achievements MainPageAttributes.png Attributes MainPageBosses.png Bosses TarotCard.png Cards and Runes MainPageChallenges.png Challenges MainPageChapters.png Chapters
Isaac App.png Characters MainPageBabies.png Co-op Magic Mushroom Icon.png Items Isaac's Tears Icon.png Item Pools MainPageMonsters.png Monsters MainPageObjects.png Objects
Red heart.png Pickups BlueBlue.png Pills MainPageRooms.png Rooms MainPageSeeds2.png Seeds Guppy App.png Transformations The Left Hand Icon.png Trinkets
Promotional Content