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Blastocyst

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Blastocyst
Blastocyst full
Offical artwork by Edmund McMillen
Statistics
Type
Health
Damage
{{{type}}}
{{{health}}}
{{{damage}}}
Floor(s)
The Womb
Related Bosse(s)
Monstro
Effective Item(s)
N/A
Dropped Item(s)
Common Drops
WotL Common Drops


The Blastocyst is a rare boss composed of a large gelatinous bubble with an Embryo in its centre that will occasionally appear in the Womb/Utero. Rarely, instead of the large form, two medium and two small Blastocysts will appear. Several non-Boss variations with a shell are occasionally found in the Womb (or very rarely in the Depths), though the weakest versions (with just the non-hostile Embryo) can be found in most floors, particularly in rooms with a blood donation machine. Due to its behavior, it is essentially a weaker Monstro version encountered in The Womb.

Behavior

In its largest form, Blastocyst can do a low hop, sometimes scattering bullets all over the place. It can also do a large jump shooting in 8 directions upon landing. It will split into two smaller versions upon taking enough damage.

In its next form, Blastocyst can shoot a 4 way shot either in the four cardinal directions or diagonally when it lands after jumping. It also splits into 2 smaller forms upon taking enough damage.

In its next form, it fires a 4 way shot in the four cardinal directions after being still for a short time. It does not shoot when landing after jump. It loses its bubble upon taking enough damage and becomes an Embryo.

Trivia

  • Also known as "Blobby" or "The Embryo" according to the Unholy Edition art booklet.
  • In mammalian biology, a blastocyst is a hollow fluid-filled cellular structure formed in early pregnancy which contains the cells which will eventually form an embryo.

Gallery

Videos


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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