Teratoma

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Teratoma is a boss that can appear:

The large Teratoma has 60 HP, the medium forms have 15 HP, and the small forms have 8 HP, for a total of 153 HP.

Behavior

  • Moves around the room slowly, bouncing off the walls.
  • When enough health is depleted, the one large Teratoma breaks into three medium Teratomas.
    • Medium forms behave identically, but move slightly faster.
  • Each of the three medium Teratomas breaks into two small Teratomas.
    • Small forms behave identically, but move very fast.
  • Each of the smallest Teratomas spawns two Spider.pngSpiders on defeat unless they are over a pit or other obstacle.
  • All stages of Teratoma will do 1 full heart of contact damage.

Gallery

Trivia

  • Teratoma was added in the Wrath of the Lamb DLC for the original The Binding of Isaac.
  • It is the posthumous form of Boss Fistula ingame.pngFistula.
  • A teratoma is a rare tumor that contains tissues that are atypical for its placement in the body. This can include hair, teeth, bones, and so on.
  • Unlike the original Binding Of Isaac, Teratoma doesn't bounce off of Rocks.
  • (except in Repentance and Repentance+) Teratoma is one of the three bosses that can be spawned by Boss It Lives ingame.pngIt Lives, the other two being Boss Chub ingame.pngChub and Boss Polycephalus ingame.pngPolycephalus.
    • (in Repentance and Repentance+) It Lives can now spawn Fistula as well.