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Gabriello Serra was a friar and leader of Fraternitas Mysterium.
He looks like a mummified corpse with a green aura. His left eye is open and glowing, while the other looks like a lidded empty socket.
Powers and abilities
He could fly, and crash up through wooden floors with supernatural strength.
The legend was that he and his donkey had tried to save Crystal Cove by warning them of an upcoming earthquake.
Scooby-Doo! Mystery Incorporated
He told Mystery Incorporated the story of the donkey that saved Crystal Cove is a lie. The Donkey tried to destroy Crystal Cove, not save it. The ghost of Friar Serra warned of the coming of "Nibiru" and that "the dog must die" because the animal mascot always started the downfall.
- Scooby-Doo! Mystery Incorporated
Gabriello: Heed the warning of the alligators: The dog dies!