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Fistula

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IsaacHDXxx form2Isaac Rebirth

Fistula

Fistula

Boss Fistula


Official artwork by Edmund McMillen
Statistics
Type
Health
Damage
{{{type}}}
60 (Large)
25 (Medium)
8 (Small)
{{{damage}}}
Floor(s)
Caves (TBoI only)
Catacombs (TBoI only)
Related Bosse(s)
Teratoma
Effective Item(s)
N/A
Dropped Item(s)
Common Drops
WotL Common Drops


Fistula (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 that look like couple of rotten flesh (with red fleshy skins from the inside) sewn together with thick stitches into a form of a large sphere. It sports with several hair strings, warts, and holes. In Edmund's artwork (and including the one from Rebirth), few Chargers can be seen peeking out from the holes.

Behavior

Fistula large

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.
Fistula medium

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.

Fistula small

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

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.

Notes

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

Trivia

  • Page 24

    Fistula in the Artbook.

    From the artbook, Chargers suppose to peek out of the holes while Fistula's smaller parts moving 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 is also notable that 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 Edmund's old series The Badlands.
  • 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
Regular Bosses
Blastocyst button

Blastocyst
Brownie
Chub button

Chub
Daddy Long Legs button

Daddy Long Legs
Dangle
Dark One button

Dark One
Dingle button

Dingle
Duke of Flies button

The Duke of Flies
Fallen button

The Fallen
Fistula button

Fistula
Gemini button

Gemini
Gurdy button

Gurdy
Gurdy Jr button

Gurdy Jr.
Gurgling button

Gurglings
Haunt button

The Haunt
Larry Jr button

Larry Jr.
Little Horn
Loki button

Loki
Mama Gurdy button

Mama Gurdy
Mask of Infamy button

Mask of Infamy
Mega Fatty button

Mega Fatty
Mega Maw button

Mega Maw
Monstro button

Monstro
Mr Fred button

Mr. Fred
Peep button

Peep
Pin button

Pin
Polycephalus button

Polycephalus
Rag Man
Scolex button

Scolex
Turdlings
Widow button

Widow
Posthumous Bosses
Adversary button

The Adversary
Blighted Ovum button

The Blighted Ovum
Bloat button

The Bloat
Cage button

The Cage
Carrion Queen button

Carrion Queen
The Forsaken
The Frail
Gate button

The Gate
Hollow button

The Hollow
Husk button

The Husk
Lokii button

Lokii
Monstro II button

Monstro II
Teratoma button

Teratoma
The Stain
Wretched button

The Wretched
Alternative Bosses
CHAD button

C.H.A.D.
Gish button

Gish
Sister Vis button

Sisters Vis
Steven button

Steven
Triachnid button

Triachnid
Harbingers
Conquest button

Conquest
Death button

Death
Famine button

Famine
Headless Horseman button

Headless Horseman
Pestilence button

Pestilence
War button

War
Final Bosses
XXX button

???
Hush
Isaac button

Isaac
It Lives button

It Lives
Lamb button

The Lamb
Mega Satan button

Mega Satan
Mom button

Mom
Mom's Heart button

Mom's Heart
Satan button

Satan
Ultra Greed
Minibosses
Seven Deadly Sins
Envy button

Envy
Gluttony button

Gluttony
Greed button

Greed
Lust button

Lust
Pride button

Pride
Sloth button

Sloth
Wrath button

Wrath
Seven Super Deadly Sins
Envy button

Super Envy
Super Gluttony button

Super Gluttony
Super Greed button

Super Greed
Super Lust button

Super Lust
Super Pride button

Super Pride
Super Sloth button

Super Sloth
Super Wrath button

Super Wrath
Ultra Pride button

Ultra Pride
Angels / Demons
Krampus button

Krampus
Angel button

Gabriel
Angel button

Uriel
Angel button

Fallen Angels
LEGENDS: The Binding of Isaac bosses are yellow. Wrath of the Lamb bosses are teal. Rebirth bosses are orange. Afterbirth bosses are crimson. Afterbirth † bosses are violet.

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