Earthworm Jim's boots
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Earthworm Jim's boots are a leg equipment that were worn by the infamous hero Jim who resigned after saving Princess what's-her-face. The hero fortunate enough to find these boots may find he can use his feet as well as a normal person can.
Common side effects include but are not limited to: being chased by an unusual amount of monsters, becoming a 2D side-scroller, racing someone after each level, and a severe lack of blisters.