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Eldritch Physiology

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The power to possess traits of a being so alien as to be beyond rules of nature/existence. Alien variation of Cosmic Entity Physiology.

Also Called

  • Eldritch Abomination/Entity/Horror Physiology
  • Eldritch Form
  • Outsider Physiology
  • Lovecraftian Horror


The user of this power is or can transform into an eldritch abomination, a being whose very existence defies the rules of nature and/or existence. They wield godlike powers and are, for the most part, not bound by the laws of the universe. Their true form cannot be grasped by mortal beings, and may be interpreted differently by different individuals/species, with others creating a collective delusion of their form. These interpretations can range from the unusual, to the awe-inspiring, to the mind-shatteringly terrifying. It is rare, but not unheard of, for the presence of such a being to benefit the universe it currently inhabits.



  • Animalistic Abomination: Virtually identical to the above ability, but always confined to a form more or less similar to a terrestrial animal. Users of this variation may be weaker, but also much stealthier due to their "less" horrific presence.
  • Cthulhu Mythos Deity Physiology: Another advanced version of the former, to be of the Cthulhic pantheon is to command the forces other lesser outsider entities as well as create them to suit their various needs.
  • Higher-Dimensional Abomination Physiology: A similar but advanced version of the above. Due to existing within a higher dimensional plane of existence, they can move about through most any/all planes unabated.
  • Humanoid Abomination: Virtually identical to the above ability, but always confined to a more or less humanoid form. Users of this variation may be weaker, but also much stealthier due to their "less" horrific presence.
  • Impossible Physiology: Exists in defiance of not only natural law, but every single law of existence and possibility.
  • Last Entity Physiology: A form of existence pertaining to the end of all things, these eldritch beings are born from the true end of time and existence.
  • Primordial Entity Physiology: Similar to an eldritch being, but one that predates the known sense of recorded existence. Primordial entities are not simply beings who stem from simply being outside of reality, but come into being before concepts were even realized.



  • May be unable to fully manifest in our universe without being let in, or at least focus their attention to the right place.
  • Native deities and cosmic beings may seek to banish/destroy the user.
  • Their presence is easily felt, making stealth all but impossible.
  • May be susceptible to Sealing or Banishment.
  • May be unable to inhabit the normal universe without sufficient nourishment.

Known Users

See Also: Eldritch Abomination.


  • Wendigo (Native American Mythology)
  • Mothman (American Folklore)
  • The Jersey Devil (American Folklore)


  • The Great Old Ones (Cthulhu Mythos)
  • The Pyramidites (Trolley No. 1852)


  • Joulupukki (Rare Exports: A Christmas Tale)


  • The Phantom Stranger (DC Comics)
  • Starro the Conquerer (DC Comics)
  • Galactus (Marvel Comics)
  • Galacta (Marvel Comics)
  • Shuma Gorath (Marvel Comics)
  • Many-Angled ones (Marvel Comics)
  • Ogdru Jahad (Hellboy)

TV Series

  • Glorificus (Buffy the Vampire Slayer)
  • The First Evil (Buffy the Vampire Slayer)
  • Jasmine (Angel)
  • Neural Parasites (Star Trek)


  • Diagon (Ben 10 series)
  • Hunson Abadeer (Adventure Time)
  • The Lich (Adventure Time)
  • Bill Cipher (Gravity Falls)
  • Cotumelians (Ben 10: Omniverse)

Tabletop Games

Video Games

  • Great Ones (Bloodborne)
  • The First Ones (Brutal Legend)
  • Aldrich, Devourer of Gods (Dark Souls III)
  • Bongo Bongo (The Legend of Zelda: Ocarina of Time)
  • Giygas (Earthbound)
  • Hermaeus Mora (The Elder Scrolls)
  • Chaos Elemental (Runescape)
  • Double (Skullgirls)
  • Saya (Saya no Uta)
  • Cthulhu (Valkyrie Crusade)
  • Vigilent (Valkyrie Crusade)


  • Aizen (Bleach); via the Hogyoku
  • Drasil (Gokukoku No Brynhildr)
  • Gauna (Sidonia No Kishi)
  • Kishin Asura (Soul Eater)


  • The Slender Man (Slender Man Mythos)
  • The Entity (AT4W)
  • The King of Worms (AT4W)
  • Night (Worm); when no one is looking


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