Sandwich monster

The Killer Sandwich was created by Scooby-Doo.

Physical appearance
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Personality
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Scooby-Doo! (DC Comics)
While Shaggy Rogers made himself a large sandwich, Scooby realized he was also hungry. He got a spell-book out of the cupboard, marked by Velma Dinkley as never to be opened, and recited a spell. Shaggy's sandwich morphed into a monster, and Shaggy ran from it in terror. Scooby recited some more magic words and the monster turned back into a sandwich. Chuckling to himself that it "works every time," Scooby ate the sandwich. (Shaggy and the Killer Sandwich)

Appearances

 * Scooby-Doo! (DC Comics)
 * #154(a). Shaggy and the Killer Sandwich (no lines)