Medusa (Gaze of the Medusa)

The Medusa was a predator alien species. The Fourth Doctor described them as vile. A Medusa can quantum-lock a person, making them petrified.



People who have been petrified are, however, still alive, frozen in time, preserved, so the Medusa can feed on their life energy for years, centuries, even. When the Medusa is done feeding, the petrified person turns to dust. The Medusa were trapped on Earth. (COMIC: Gaze of the Medusa)