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This article contains plot details from the latest book.

Gremlins are described as creatures with black fur and a puppy-like face. They like to dismantle things, especially shiny objects, and aren't very open to letting them go. Known gremlins include Sprocket, Tinker’s gremlin, and Jolie and Brant's Gremiln. They are also Foxfire's Level One mascot.

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