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The Blighted Ovum

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The Blighted Ovum is the posthumous version of Gemini appearing in The Cellar. 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.

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.
  • From the original game, The Blighted Ovum appears in The Catacombs chapter.
  • 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
Bosses
Regular Bosses
BlastocystBrownieChubDaddy Long LegsDangleDark OneDingleDuke of FliesThe FallenFistulaGeminiGurdyGurdy Jr.GurglingsThe HauntLarry Jr.Little HornLokiMama GurdyMask of InfamyMega FattyMega MawMonstroMr. FredPeepPinPolycephalusRag ManScolexTurdlingsWidow
Posthumous Bosses
The AdversaryThe Blighted OvumThe BloatThe CageCarrion QueenThe ForsakenThe FrailThe GateThe HollowThe HuskLokiiMonstro IITeratomaThe StainThe Wretched
Alternative Bosses
C.H.A.D.GishStevenTriachnid
Harbingers
ConquestWarFamineDeathPestilenceHeadless Horseman
Final Bosses
???HushIsaacIt LivesThe LambMega SatanMomMom's HeartSatanUltra Greed
Unused
Sisters Vis
Mini-bosses
Seven Deadly Sins
EnvyGluttonyGreedLustPrideSlothWrath
Seven Super Deadly Sins
Super EnvySuper GluttonySuper GreedSuper LustSuper PrideSuper SlothSuper WrathUltra Pride
Angels / Demons
KrampusGabrielUrielFallen Angels

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