Fistula

Fistula is a boss that can appear: • in the Cellar. • in the Caves and the Flooded Caves. The large Fistula has 60 HP, the medium forms have 15 HP, and the small forms have 8 HP. Contents • 1 Behavior • 2 Champion Versions • 3 Gallery • 4 Trivia

• Moves around the room slowly, bouncing off the walls.
• When enough health is depleted, the one large Fistula breaks into four medium Fistulas.
• Medium forms behave identically but move slightly faster and can bounce off other enemies.
• Each of the four medium Fistulas breaks into two small Fistulas.
• Small forms behave identically but move very fast.
• Each of the smallest Fistulas spawns a Charger with 15 health points on defeat unless they are over a pit or other obstacle.
• Altogether, the pieces have a combined total of 184 HP (304 HP if including the 8 Chargers).
• All stages of Fistula deal a whole heart of contact damage.

Grey: 15% larger with 25% more HP (75). Spawns Boom Flies with 15 health points instead of Chargers unless the smallest Fistula piece is over a pit or other obstacle. Each piece travels much slower and splits into three medium Fistulas as opposed to the original's four, similar to Teratoma.

• Fistula appeared in the original The Binding of Isaac.
• A fistula is an abnormal connection between organs, intestines, and other tissues.
• Fistula’s splittings after taking enough damage is a reference to the game Asteroids, where asteroids would float diagonally and split after taking enough damage. This was confirmed by Edmund McMillen[citation needed].
• Fistula used to be a Caves / Catacombs boss in the original The Binding of Isaac, but as of Rebirth, it was a Cellar boss.
• It has been moved back into the Caves.
• Teratoma is the posthumous version of Fistula.
• Unlike the original The 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.
• Fistuloid is an enemy variant of this boss combined with what looks to be a Charger or Spitty.
• 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.
• Mother will spawn a unique Fistula with a rotten appearance during one of her attacks.
• A similar Looking Fistula can be encountered in the Corpse.
• Fistula is one of four bosses that can be spawned by It Lives, the other three being Chub, Polycephalus and Teratoma. Bosses Chapter 1 Monstro
• Gemini
• Steven
• Dingle
• Gurglings
• Larry Jr.
• The Duke of Flies
• Widow
• Blighted Ovum
• The Haunt
• Pin
• Famine
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• Turdlings
• Little Horn
• Rag Man Baby Plum Chapter 1.5 The Rainmaker
• Min-Min
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• Wormwood
• Clog
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• Turdlet Chapter 2 Fistula
• Chub
• C.H.A.D.
• Gurdy
• Mega Fatty
• Mega Maw
• Gurdy Jr.
• Peep
• The Husk
• The Hollow
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• The Frail
• The Forsaken Big Horn
• Rag Mega Bumbino Chapter 2.5 Reap Creep
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• Mom
• Mom's Heart Chapter 4 Blastocyst
• Mama Gurdy
• Scolex
• Mr. Fred
• Lokii
• The Bloat
• Daddy Long Legs
• Triachnid
• Teratoma
• Death
• Conquest
• The Fallen
• Headless Horseman
• Mom's Heart
• It Lives The Matriarch ??? Hush Corpse Chimera
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• Rotgut
• Mother Chapter 5 Satan
• Isaac Chapter 6 ???
• The Lamb
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• The Beast Greed Mode Ultra Greed Ultra Greedier The Binding of Isaac: Rebirth
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