Fistula

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Boss Fistula name.png
Boss versus screen image
 
 
TableDividingLine1.png
 
In-game appearance
TableDividingLine2.png
 
Boss
Stage cellar.png
Challenge Room Icon.pngBoss Challenge Room Icon.pngSuper Secret Room Icon.png
Mini-Boss
Small
Stage caves.pngStage flooded caves.png
Stage depths.pngStage dank depths.png
Stage womb.pngStage scarred womb.png
Medium
Stage depths.pngStage necropolis.pngStage dank depths.png
Stage womb.pngStage utero.pngStage scarred womb.png
Stage chest.pngStage dark room.png
Large
Stage womb.pngStage utero.pngStage scarred womb.png
Stage cathedral.pngStage sheol.png
Stage chest.pngStage dark room.png
TableDividingLine3.png
 
Boss Boss

Fistula is a boss that can appear in the Cellar. The large size Fistula has 60 HP, the medium forms have 15 HP, and the small forms have 8 HP.

Behavior[edit | edit source]

  • Moves around the room slowly, bouncing off the walls.
  • When enough health is depleted, the one large Fistula breaks into four medium Fistulas.
  • Each of the four medium Fistulas break into two small Fistulas.
  • After the smallest Fistulas are defeated, they spawn Chargers unless they are over a pit or other obstacle.
  • All stages of Fistula will do 1 red heart of contact damage.

Champion Versions[edit | edit source]

  • Black: Spawns Boom Flies instead of Chargers. Each piece travels much slower, and splits into three medium Fistulas as opposed to the original's four, similar to Teratoma.

Gallery[edit | edit source]

Trivia[edit | edit source]

  • Fistula appeared in the original Binding of Isaac.
  • A fistula is an abnormal connection between organs, intestines, and other tissues.
  • Fistula’s splittings after taking enough damage is most likely a reference to the game Asteroid, where asteroids would float diagnally and split after taking enough damage. This was confirmed by Edmund McMillen.
  • Fistula used to be a Caves/Catacombs boss in the original "Binding of Isaac", but as of Rebirth, it is a Cellar boss.
  • Teratoma is the posthumous version of Fistula.
  • Unlike the original "Binding Of Isaac", Fistula doesn't bounce off of Rocks.
  • Fistula was inspired by a boss of the same name in another Edmund McMillen game, C-Word.
  • Added in Afterbirth † Fistuloid is an enemy variant of this boss combined with what looks to be a Charger or Spitty.
  • Added in Afterbirth † The Matriarch is a boss added in Booster Pack #5 that is simultaneously based of a Fistuloid, Chub, and this boss. The Matriarch will also spawn small Fistulas throughout the battle.
Bosses Boss Monstro.png
Chapter 1
Stage basement.png
Stage cellar.png
Stage burning basement.png
Blighted OvumDingleThe Duke of FliesFamineFistulaGeminiGurglingsThe HauntLarry Jr.MonstroPinStevenWidow
Added in Afterbirth DangleLittle HornRag ManTurdlings
Chapter 2
Stage caves.png
Stage catacombs.png
Stage flooded caves.png
Carrion QueenC.H.A.D.ChubDark OneGurdyGurdy Jr.The HollowThe HuskMega FattyMega MawPeepPestilencePolycephalusThe Wretched
Added in Afterbirth The ForsakenThe FrailThe Stain
Added in Afterbirth † Big HornRag Mega
Chapter 3
Stage depths.png
Stage necropolis.png
Stage dank depths.png
The AdversaryThe BloatThe CageThe GateGishLokiMask Of InfamyMonstro IIWarMom
Added in Afterbirth Brownie
Added in Afterbirth † Sisters Vis
Chapter 4
Stage womb.png
Stage utero.png
Stage scarred womb.png
BlastocystThe BloatConquestDaddy Long LegsDeathLokiiMama GurdyMr. FredScolexTeratomaTriachnidMom's HeartIt Lives
Added in Afterbirth † Sisters VisThe Matriarch
Added in Afterbirth Blue Womb
???
Added in Afterbirth Hush
Chapter 5
Stage sheol.png
Stage cathedral.png
SatanIsaac
Chapter 6
Stage dark room.png
Stage chest.png
???The LambMega Satan
Added in Afterbirth Greed Mode
Ultra Greed
Added in Afterbirth Ultra Greed
Added in Afterbirth † Ultra Greedier
Added in Afterbirth † The Void
Stage the void.png
Added in Afterbirth † Delirium
Chapters 1-4 The FallenThe Headless Horseman


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