"Dr. Hibbert, I thought you located another kidney for Grampa?"
"Larry Hagman took it! He's got five of them now. And three hearts. We didn't want to give them to him, but he overpowered us"
― Lisa Simpson and Julius Hibbert (The Simpsons)

The power to possess a secondary copy of an internal organ. Variation of Appendage Generation. Opposite of Atrophy.

Also Called

  • Double Set of Organs
  • Multiple Organs
  • Numerous Organs


The user has or can create one or more auxiliary organs (brain, heart, nervous system, etc.) should their main ones be rendered useless. The additional organs may also enable enhanced physical attributes.





  • Unclear if users could clone an organ to allow the original one to be destroyed.
  • Room within the body is always an issue unless the users have a way to fix it, like Bone Manipulation.
  • May only apply to internal organs, such as the heart, brain, lungs, stomach, etc.

Known Users

  • Andalites (Animorphs)
  • Muzan Kibutsuji (Demon Slayer: Kimetsu no Yaiba)
  • Fantomex (Marvel Comics)
  • Marrow (Marvel Comics)
  • Kakuzu (Naruto)
  • Cereans (Star Wars)
    • Ki-Adi-Mundi
  • Krogans (Mass Effect)
  • Kryptonians (DC Comics)
  • Klingons (Star Trek)
  • Time Lords (Doctor Who)
  • Space Marines (Warhammer 40,000)
  • Terumi Yuuki (BlazBlue)
  • Mayuri Kurotsuchi (Bleach)
  • Decapodians (Futurama)
  • Styne Family (Supernatural)
  • Godzilla (Godzilla)
  • Midnighter (WildStorm/DC Comics)
  • Josuke Higashikata (JoJo's Bizarre Adventure Part 8: JoJolion)
  • Tamaraneans (Teen Titans)
  • Flying bisons (Avatar: The Last Airbender/The Legend of Korra)
  • Combaticus (Superjail)


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