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IsaacHD.png Xxx form2.png Isaac Rebirth.png


Fistula (フィステューラ Fisutūra) (also known as "Meat Ball" from the artbook) is a boss found in Caves and Catacombs from the original game. In Rebirth, however, it is found in the Cellar only.

Description

Fistula's appearance is extremely grotesque-looking, made of pieces of rotten flesh (with red fleshy skins from the inside) sewn together with thick stitches to form a large sphere. It sports with several hair strings, warts, and holes. In Edmund's artwork (and including the one from Rebirth), a few Chargers can be seen peeking out from the holes.

Total HP: 60 (Large) + 4x15(Medium) +8x8(Small) = 184

Behavior

Larger form.

It resembles Envy in how it behaves, beginning as a single entity before splitting into four smaller entities upon taking damage, which then each split into two with further damage. However, unlike Envy, when reduced to the lowest size, the sections become Chargers.

Medium-sized form.

The smaller a piece becomes, the faster it moves around. Pieces can also collide with each other, which changes their direction. Because of this, it is recommended to leave bigger parts intact for as long as possible, and focus on one part at a time. That way, the movement of the parts is more predictable, making the parts easier to dodge. It is also advised to kill the Charger before moving onto the next part, if possible. 

Despite floating in the air, Fistula and its parts cannot move over Rocks. However, as of the Wrath of the Lamb expansion, it can move over Pits.

Smaller form.

Fistula appears regularly as a Mini-Boss starting from The Caves to Sheol. In The Caves and The Depths, it starts as two smaller entities, and in The Womb and Sheol, a whole Fistula appears.

Champion Variants

Dark Blue

Fisula Dark.png

Total HP: 75 (Large) + 3x18.75 (Medium) + 6x10(Small) = 191.25

In this form, it will initially split into three entities instead of four and will spawn Boom Flies and Red Boom Flies on death. This version of Fistula has slightly more health, is larger, and moves slower.

Eternal

Eternal Fistula.png

Every time it splits, it shoots 8-way bullets. It also spawns Eternal Spitties on death.

Notes

  • As a miniboss, Fistula will not spawn a Charger or Boom Fly if the smallest part is killed above a pit.

Trivia

  • Fistula in the Artbook.

    From the artbook, Chargers seem to peek out of the holes while Fistula's smaller parts move around.
  • Fistula appeared in the demo from the original game.
  • The tradition of fighting the boss with its parts breaking into smaller and smaller pieces is based on the arcade classic Asteroids.
  • A fistula is a medical condition in which organs and other bodily tissues are abnormally connected to each other.
  • The name "Fistula" is used for another enemy in another game by Edmund McMillen: a flash game called The C-Word on Newgrounds.
  • It's also notable that in the background of Host, another one of Edmund's games, there is what appears to be a Fistula.
  • Fistula also slightly resembles a dead Dumpling, a creature from his Badlands series.
  • In older versions, Fistula used to shake while moving. Since the Wrath of the Lamb update, it no longer does so.

Bugs

  • Using Mom's Bra on the first form can cause subsequent forms to get stuck behind rocks, making this boss unbeatable if the player cannot break the rocks. The same is true with Teratoma.
  • Using Mom's Pad on any form may cause it to become trapped in rocks making it impossible to defeat without destroying the rocks. The same is true about Teratoma.

Sprites

Videos

Bosses
Chapter 1
Dukeofflies full.png
The Duke of Flies
Gemini full.png
Gemini
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Monstro
Larryjr full.png
Larry Jr.
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Steven
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Famine
260x200-400px-Widow3.png
WidowDLC.png
Pin clean.png
PinDLC.png
Chapter 2
Fistula.png
Fistula
Gurdy full.png
Gurdy
Peep Full.png
Peep
Chub.png
Chub
Chad full.png
C.H.A.D.
BC Pestilence.png
Pestilence
The Husk.png
The HuskDLC.png
260x220-The Hollow2.png
The HollowDLC.png
Chapter 3
285x230-MonstroII full.png
Monstro II
Loki full.png
Loki
250x250-400px-Mom.png
Mom
Gish full.png
Gish
BC War.png
War
Mask of Infamy.png
Mask of InfamyDLC.png
Chapter 4
Scolex full.png
Scolex
Blastocyst full.png
Blastocyst
Moms Heart Full.png
Mom's Heart
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It Lives
VSDeath.png
Death
250x200-Teratoma..png
TeratomaDLC.png
Lokii cutout.png
LokiiDLC.png
BC Conquest.png
ConquestDLC.png
Chapter 5
Satan Full.png
Satan


Bc isaac.png
IsaacDLC.png
Chapter 6
BC xxx.png
???DLC.png
Any Chapters
TheFallen Full.png
The Fallen*
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Headless Horseman*
Gurdjr.png
Gurdy Jr.*DLC.png
Blighted ovum.png
Blighted Ovum*DLC.png
Carrionqueen.png
The Carrion Queen*DLC.png
The Wretched.png
The Wretched*DLC.png
VS DaddyLonglegs.png
Daddy Long Legs*DLC.png
Bc Bloat.png
The Bloat*DLC.png
200x300-400px-Triachnid boss portrait.png
Triachnid*DLC.png
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