- "Then you have not lost your humanity, you have reaffirmed it."
- ― Tuvok (Star Trek Voyager)
- 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.
- Magic Negation
- Power Erasure
- Shapeshifting Negation
- Spell Negation
- Transformation Negation
- May not work on users of Regenerative Healing Factor.
- 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.
- 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