The power to use the abilities of demons and undead. Combination of Demon Physiology and Undead Physiology. Variation of Hybrid Physiology. Opposite to Angelic-Undead Physiology.

Also Called

  • Demonic-Undead Mimicry
  • Necrodemon/Necrotic Demon Mimicry/Physiology
  • Undead-Demon Mimicry/Physiology
  • Undead-Demonic Mimicry/Physiology
  • Undemon Mimicry/Physiology


User with this ability either is or can transform into a combination of an demon and an undead. Their presence is extremely unnatural and/or corrupt. They specialize in the raw power of unholy and necrotic energies for powerfully destructive effects.




  • Certain hybrid types may still rely on their undead species need to feed on blood, life-force, flesh, etc.
  • May be vulnerable to holy powers and artifacts.
  • If resurrected, may lose access to undead powers.
  • May corrupt the user's mind.

Known Users

  • Marceline (Adventure Time); after being turned into a vampire.
  • Hellhounds (Call of Duty Series)
  • Hell Jason (Friday the 13th The Game)
  • Purgatori (Chaos Comics)
  • The Possessed (Doom 2016 Series)
  • Zombiemen (Doom Series)
  • Zombies (Doom 3 Series)
  • Deadites (The Evil Dead franchise)
  • The Stitched (The Stitched)
  • Orcus (Forgotten Realms); before resurrection
  • Visages (Forgotten Realms)
  • Undead Demons (InuYasha)
  • DoomSpy (TF2 Freak)
  • BLU Nnnngh Sniper (TF2 Freak)
  • Bodyconian (Megami Tensei)
  • Isabella Von Carstein (Warhammer Fantasy); after her resurrection in The End Times.