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The mummy haunted the set of the Lucasberg movie, The Mummy's Tomb.
It looked like a glowing mummy. This was due to luminous paint on its gauze wrapping.
It growled and acted violently.
Powers and abilities
It showed no powers, but it did have insider knowledge of the movie set, making use of a concealed secret door, for example.
Scooby-Doo! (DC Comics)