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The Blighted Ovum (ブライテド・オーブム Buraitedo Ōbumu) is the posthumous version of Gemini appearing in The Cellar and The Catacombs. He has a higher chance of appearing if Isaac has killed Gemini before.


The Blighted Ovum spawns already separated, similar to the green Champion version of Gemini.

Behavior

The larger sibling appears as a mangled and bloody zombie, with parts of the skull eaten away. He leaves behind a trail of red creep as he moves, which damages Isaac for a full heart. Unlike Gemini, he will constantly pursue Isaac, not stopping for breath after charging.

Meanwhile, the other half appears as an invulnerable spirit, and is passive unless Isaac gets in his line of sight, in which case, he fires a blood beam similar to Brimstone. He tends to stay floating in the area it spawns in, not moving around much. 

Upon death, each half shoots radial blood shots, similar to when Steven is killed.

Champion Variants

Eternal

Much like Eternal Gemini and Eternal Steven, Eternal Blighted Ovum starts with 1 large sibling and 2 small invulnerable ones. The large one acts exactly the same as its normal counterpart but he can slowly regenerate HP and is able to destroy rocks. The other 2 small ones fire blood beams at Isaac. All of them explodes into fast 8-way bullets on death.

Notes

  • If The High Priestess is used on the Blighted Ovum, Mom's foot will stomp on the smaller twin, doing no damage and thus being useless.

Trivia

  • They appear in the Wrath of the Lamb DLC for the original game.
  • The Blighted Ovum no longer appears in the Catacombs since Rebirth.
  • In medicine, a blighted ovum is a pregnancy in which the early pregnancy appears normal on an ultrasound scan, but later no visible embryo develops. This likely refers to the smaller twin being dead (a spirit).
  • The large bite on the top of the head is on the opposite side on the artwork and sprite; this is probably unintentional.
  • He is also missing his jaw like Daddy Long Legs and Headless Horseman.
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
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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
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???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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