- "Then you have not lost your humanity, you have reaffirmed it."
- ― Tuvok (Star Trek Voyager)
- Conversion Curing/Reversal
- Reverse Conversion
- Transformative Negation
- Transformation Undoing
The user can transform other beings back into their original species; for example, the user can turn a vampire back into their original species, or reverse a non-hereditary werewolf's lycanthropy.
- Deroboticization: reverting victims of Robotization back to their natural state.
- Humanization: as several beings, such as vampires and werewolves, were originally human.
- Mutation Reversion: reverting mutations.
- Conversion Recovery
- Magic Negation
- Power Erasure
- Shapeshifting Negation
- Spell Negation
- Transformation Negation
- Cannot work on users of Ultimate Regeneration and Absolute Regeneration.
- Cannot work on people who are Complete Indestructible, Complete Immortal and Unchanged.
- May be constantly active and uncontrollable.
- Does not work on beings who are not the result of some form of Conversion; e.g. someone who was born a vampire rather than turned, or someone who was built as a robot rather than roboticized.
- Users of Omni-Conversion are immune.
- Usually requires the method to actively enter the target's system to be effective.
- Moon Pool (H2O: Just Add Water/Mako Mermaids); can turn merpeople back into humans and vice versa
- Mystic Falls (The Vampire Diaries); temporarily surrounded by a magic-negating field that could revert vampires and hybrids to their original state