The power to gain traits that have been lost or disappeared years ago. Variation of Evolution.

Also Called

  • Evolutionary Throwback
  • Primal Form/Reversion
  • Regressive Atavism/Evolution


The user reverts into primal form, becoming an evolutionary throwback with traits which have disappeared generations before.




  • Users may have a limited intellect.
  • Users may not have control of their primitive instinct and urges.
  • Users' physiology may be unstable.

Known Users

  • Turok-Han (Buffy the Vampire Slayer)
  • Antarcticians (Centaur no Nayami)
  • Waylon Jones/Killer Croc (DC Comics)
  • Cheaters (Deathtopia)
  • Yusuke Urameshi (Yu Yu Hakusho)
  • Ancient Zoan Type Devil Fruit Users (One Piece)
  • Professor Richard Lazarus (Doctor Who); via sonic micro-field manipulator
  • Dr. Henry Mccoy/Beast (Marvel Comics)
  • James "Logan" Howlett/Wolverine (Marvel Comics)
  • Andrea Talbott (The She Creature)
  • Tony Rivers (I Was A Teenage Werewolf)
  • Primal Kyogre (Pokémon)
  • Primal Groudon (Pokémon)
  • Orb and Decka's Species (Ben 10: Alien Force)
    • Decka
  • Nanao Tachibana (Testament of Sister New Devil)