??? (Boss)

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???
Boss versus screen image
Base HPStage HP
2000
0
Table dividing line 1.png
Ingame Appearance
In-game appearance

Entity ID
102.1
Table dividing line 2.png
Found In
Boss
Stage The Chest icon.png
Stage The Void icon.png
Table dividing line 3.png
Dropped Items
Final Boss Chest
Disambig.png This article is about the boss at the end of The Chest. For the character, see ??? (Character). For other uses, see ??? (Disambiguation).

??? is the boss of The Chest The Chest, accessed by defeating Isaac in the Cathedral Cathedral while holding 15►The Polaroid The Polaroid, which is always dropped by Mom after defeating Isaac five times. He is a posthumous version of Isaac, and the final boss of Ending 14.

Behavior[edit | edit source]

??? lies on the ground in the middle of the room does not begin attacking until he takes damage.
During all three of ???'s phases, he continuously shoots multiple projectiles in the Isaac's direction at fixed intervals at a faster rate than Isaac. After taking enough damage, he begins to shoot double and triple projectiles.

  • Each projectile has a chance of having a homing effect.

Phase 1[edit | edit source]

??? remains stationary on the ground and performs the following attacks:

  • Shoots 7-8 rapid-fire lines of projectiles in all directions that expand outwards. After taking enough damage, these lines curve while travelling.
  • Shoots 8 lines of 2 projectiles in all directions that expand outwards. Each line consists of one normal projectile and one homing projectile. After taking enough damage, these lines curve while travelling.
  • After taking enough damage, ??? summons Attack Flies, Moters, or Pooters that orbit around himself.
    • Pooters have a farther orbit than the other flies.
    • Attack Flies spawned from Moters chase Isaac instead of orbiting ???.

Phase 2[edit | edit source]

2 Eternal Flies that can block tears begin to circle ???, who stands up but remains stationary and performs the following attacks:

  • Continues to spawn orbiting flies.
  • Fires 4 homing projectiles in a lop-sided X pattern.
  • Fires 8 homing projectiles in all directions.

Phase 3[edit | edit source]

??? grows a pair of angelic wings and is no longer stationary, slowing drifting towards Isaac and performing the following attacks:

  • Spawns orbiting flies more frequently.
  • Teleports to a position in front of Isaac- predicting his movements and attempting to cut him off. Teleports directly on top of Isaac if he isn't moving.
  • Performs the 2 projectile patterns from the first phase.

Gallery[edit | edit source]

Unlockable Achievements[edit | edit source]

Notes[edit | edit source]

  •  ??? cannot teleport during his third phase if he is slowed (e.g. using 15►Stop Watch Stop Watch).

Trivia[edit | edit source]

  •  ??? was added in the Wrath of the Lamb DLC for the original The Binding of Isaac.
  • The music that plays during this boss fight is titled Ascension.[1] The term "ascend" is typically used in religion as the act of one's soul rising to Heaven.
  •  ???, along with Isaac, teleport away upon defeat and do not "die".
  •  ??? is commonly referred to as the 'blue baby' by the Binding of Isaac community, as well as Steam Achievements.
  • Added in Afterbirth ??? is fought as the first phase of Hush with identical behavior and music, only using a different sprite. The Hush version also has half the HP.
  • Added in Afterbirth † Delirium's ??? form is one of its only forms that don't have any melted features, along with both of the Angels.

References[edit | edit source]


Bosses Boss Monstro.png
Chapter 1
Stage The Basement icon.pngStage The Cellar icon.pngStage Burning Basement icon.png
GeminiStevenBlighted OvumDingleThe Duke of FliesFamineGurglingsThe HauntLarry Jr.MonstroPinWidowThe FallenThe Headless Horseman
DangleLittle HornRag ManTurdlings
Baby Plum
Chapter 1.5
Stage Downpour icon.pngStage Dross icon.png
Lil BlubWormwoodThe RainmakerMin-MinClogColostomiaTurdlet
Chapter 2
Stage The Caves icon.pngStage The Catacombs icon.pngStage Flooded Caves icon.png
FistulaChubC.H.A.D.Carrion QueenDark OneGurdyGurdy Jr.The HollowThe HuskMega FattyMega MawPeepPestilencePolycephalusThe WretchedThe FallenThe Headless Horseman
The ForsakenThe FrailThe Stain
Big HornRag Mega
Bumbino
Chapter 2.5
Stage Mines icon.pngStage Ashpit icon.png
Reap CreepTuff TwinsHornfelGreat GideonSingeThe ShellThe Pile
Chapter 3
Stage The Depths icon.pngStage Necropolis icon.pngStage Dank Depths icon.png
The AdversaryThe BloatThe CageThe GateMonstro IIGishLokiMask of InfamyWarThe FallenThe Headless HorsemanMom
Brownie
Sisters Vis
Reap CreepThe Pile
Chapter 3.5
Stage Mausoleum icon.pngStage Gehenna icon.png
The SirenThe HereticThe VisageThe Horny BoysMomMom's Heart
Chapter 4
Stage The Womb icon.pngStage Utero icon.pngStage Scarred Womb icon.png
BlastocystThe BloatConquestDaddy Long LegsTriachnidDeathLokiiMama GurdyMr. FredScolexTeratomaThe FallenThe Headless HorsemanMom's HeartIt Lives
Sisters VisThe Matriarch
???
???
Hush
Corpse
Stage Corpse icon.png
ChimeraThe ScourgeRotgutMother
Chapter 5
Stage Sheol icon.pngStage Cathedral icon.png
SatanIsaac
Chapter 6
Stage Dark Room icon.pngStage The Chest icon.png
???The LambMega Satan
The Void
Stage The Void icon.png
Delirium
Home
Stage Home icon.png
DogmaThe BeastUltra DeathUltra FamineUltra PestilenceUltra War
Greed Mode
Ultra Greed
Ultra Greed
Ultra Greedier
The Binding of Isaac: Rebirth The Binding of Isaac: Rebirth The Binding of Isaac: Rebirth
Achievements Achievements Attributes Attributes Bosses Bosses TarotCard.png Cards and Runes Challenges Challenges Chapters Chapters
Characters Characters MainPageBabies.png Co-op Items Items Item pools Item pools Monsters Monsters Objects Objects
Pickups Pickups Pills Pills Rooms Rooms Seeds Seeds Transformations Transformations Trinkets Trinkets