"I'm not even human now!"
― Llenn (Sword Art Online Alternative: Gun Gale Online)
"We are the Borg. You will be assimilated. Resistance is futile."
― Borg Collective (Star Trek)

The power to transform people into different creatures. Sub-power of Conversion Manipulation. Opposite to Conversion Negation.

Also Called

  • Racial Conversion
  • Species Conversion/Transformation
  • Turning


The user can permanently transform other beings into other kinds of creatures, typically the kind they are; for example, vampires transforming humans into other vampires through a bite. The methods used vary depending on the circumstances; generally through blood or bites, sometimes through injection or spells.






Known Users


  • Werewolves (Folklore/Mythology)
  • Undead (Folklore/Mythology)
    • Ghouls
    • Vampires
    • Zombies

Live Television/Movies

  • Wraither Demons (Angel)
  • Vampires (Blade Trilogy)
  • Reapers (Blade II)
  • Vampires (Buffy the Vampire Slayer/Angel)
  • Avatars (Charmed)
  • Spider Demons (Charmed)
  • Vampires (Charmed)
  • Banshees (Charmed)
  • Wendigos (Charmed)
  • Furies (Charmed)
  • Nymphs (Charmed)
  • Enchantress (DC Extended Universe)
  • Ood (Doctor Who)
  • Cybermen (Doctor Who)
  • Krynoids (Doctor Who)
  • The Flood (Doctor Who)
  • The Master (Doctor Who); via the Immortality Gate
  • Gas Mask Zombies (Doctor Who)
    • Jamie/The Empty Child
  • Saturnyns (Doctor Who)
  • Wirrn (Doctor Who)
  • Zygons (Doctor Who)
  • CyberKing (Doctor Who)
  • Adipose (Doctor Who)
  • Fireplace Monsters (Don't Be Afraid of the Dark)
  • Deadites (The Evil Dead)
  • Kal (Halloweentown 2: Kalabar's Revenge); via the Creature Spell and the Grey Spell
  • Dragon King (Legend of Mermaid)
  • Nyx (Once Upon a Time in Wonderland); turns anyone who takes her water into genies
  • Nighloks (Power Rangers Samurai)
  • Borg (Star Trek)
  • Thing Monsters (The Thing)
  • Halflings (True Blood); by using up all of their powers, they become ordinary humans themselves
  • Vampires (Underworld)
  • Lycans (Underworld)
  • Vampires (The Vampire Diaries/The Originals); turn humans and witches into vampires, and siphoners into vampire-witch hybrids
  • Hybrids (The Vampire Diaries/The Originals); turn humans and witches into vampires, and siphoners into vampire-witch hybrids
  • Klaus (The Vampire Diaries/The Originals); turn humans and witches into vampires, werewolves into vampire-werewolf hybrids, and siphoners into vampire-witch hybrids
  • Hope Mikaelson (The Vampire Diaries/The Originals); turn humans and witches into vampires, werewolves into vampire-werewolf hybrids, and siphoners into vampire-witch hybrids
  • Penelope Gardiner/Athena Browning (Witches of East End); via Power Absorption for Humanization
  • Witches and Warlocks (Witches of East End); turn humans into witches via Magic


  • Characters with morphing powers (Animorphs); permanently become one creature if they stay transformed for longer than two hours
  • Wizards and Witches (Harry Potter); via advanced Transfiguration
  • Vampires (Shadow Falls)
  • Werewolves (Shadow Falls)
  • Vampires (The Shadowhunter Chronicles)
  • Werewolves (The Shadowhunter Chronicles)
  • Vampires (Twilight series)
  • Werewolves (Twilight Saga)
  • Vampires (The Vampire Chronicles)
  • Psychosoma (Worm)
  • Mr. Bough/The Ophion Titan (Worm)
  • Lab Rat (Worm)
  • Cauldron Via vials (worm)
  • Monsters (City of Devils)


  • Skinner Sweets (American Vampire)
  • Vampires (DC Comics)
  • Axos (Doctor Who: The Golden Ones); via Goruda Brain Tonic
  • Sil (Gold Digger)
  • Malebolgia (Image Comics)
  • Vampires (Marvel Comics)
  • Brood (Marvel Comics)
  • Prime Sentinels (Marvel Comics)
  • Ravna (Star Wars)
  • Rakghouls (Star Wars Legends)

Video Games

  • Joseph Bertrand III (inFAMOUS 2)
  • Bloody Mary (inFAMOUS 2: Festival of Blood)
  • Firstbloods (inFAMOUS 2: Festival of Blood)
  • Heartless (Kingdom Hearts)
  • Nobodies (Kingdom Hearts)
  • Shadow Beasts (The Legend of Zelda: Twilight Princess)
  • Shroobs (Mario & Luigi: Partners in Time)
  • Ing/Darklings (Metroid Prime 2: Echoes)
  • Succubi (Monster Girl Quest)
  • The Infected (Prototype)
  • Zombies (Resident Evil)


  • Pure Elementals (Adventure Time)
  • Lumpy Space People (Adventure Time)
  • Ectonurites (Ben 10)
    • Zs'Skayr (Ben 10)
  • Diagon (Ben 10: Ultimate Alien)
  • Xenocytes/DNAliens (Ben 10: Alien Force/Ultimate Alien)
  • Dracule (Dragon Eye)
  • Necromorphs (Dead Space)
  • Chupacabra (Jackie Chan Adventures)
  • Elizabeth Frankenstein (Mary Shelley's Frankenhole)
  • Gabriel Agreste/Hawk Moth (Miraculous: Tales of Ladybug & Cat Noir)
  • Darkblade (Miraculous: Tales of Ladybug & Cat Noir)
  • Pharaoh (Miraculous: Tales of Ladybug & Cat Noir)
  • Puppeteer (Miraculous: Tales of Ladybug & Cat Noir)
  • Gamer (Miraculous: Tales of Ladybug & Cat Noir)
  • Doof "zombies" (Phineas and Ferb: Night of the Living Pharmacist)
  • Aparoids (Star Fox: Assault)
  • Kanshuu (World Embryo)


  • Users of the Founding Titan's power (Attack on Titan)
  • Zeke Yeager (Attack on Titan)
  • Demons (Demon Slayer: Kimetsu no Yaiba)
    • Muzan Kibutsuji
    • Tamayo
  • Karasumi (Hiniiru)
  • Slash (Jibaku-kun: Twelve World Story)
  • Sailor Moon (Sailor Moon); using the Silver Crystal
  • Methuselah (Trinity Blood)


  • Urdlen (Forgotten Realms)
  • Certain Monsters (Monster Girl Encyclopedia)
    • Anubis; via mummy curse
    • Apophis; via Aphophis neurotoxin
    • Succubi/Incubi; via demon energy transfusion
    • Werewolves
  • The Bastard (Whateley Academy)

Known Objects

  • Titan Serum (Attack on Titan)
  • Hōgyoku (Bleach)
  • Old Blood (Bloodborne)
  • Cagaster Disease (Cagaster of An Insect Cage)
  • Pontiff's Left Eye and Pontiff's Right Eye (Dark Souls III)
  • Electro Axe (DC Extended Universe)
  • Goruda Brain Tonic (Doctor Who)
  • Immortality Gate (Doctor Who)
  • Invincishroom (Mario & Luigi: Superstar Saga)
  • M.U.L.C.H (Milo Murphy's Law: The Phineas and Ferb Effect); transforms humans into Pistachion
  • Butterfly/Moth Miraculous (Miraculous: Tales of Ladybug & Cat Noir)
  • Mortal Cup (The Mortal Instruments); transforms humans into Shadowhunters
  • Infernal Cup (The Mortal Instruments); transforms Shadowhunters into Endarkened
  • Tunguuk's Mask (My Babysitter's a Vampire); transforms whoever is in a costume into that character
  • Heart Stone (My Fairy Tail Love Story); transforms whoever touches it into a mermaid/merman
  • Pearl of Transformation (My Little Pony: Friendship is Magic)
  • God Tree (Naruto)
  • Genie Lamp (Once Upon a Time in Wonderland)
  • Doofenshmirtz's Repulse-inator (Phineas and Ferb: Night of the Living Pharmacist)
  • Silver Crystal (Sailor Moon)
  • Lightstar Crystal (Skeleton Warriors); transforms humans into Skeletons
  • The Muur Talisman (Star Wars Legends)
  • Magic Meat/Fofoo (Transformers Rescue Bots); transforms whoever consumes it into hairy beast during the night

Known Locations

  • Moon Pool (H2O: Just Add Water/Mako Mermaids); transforms humans into merpeople
  • Planet Geo (Guy: Double Target)
  • Okami Mountain Spring (Majimoji Rurumo); transforms humans into wolves

See Also

For fan-fictional to non-canon characters, see here.


Community content is available under CC-BY-SA unless otherwise noted.