The Warriors don't have a worthy adventure to use their impressive new skull-and-crossbones-emblazoned Bonehead Magisword until they are sent on a quest to battle a mighty slime beast in the Dungeon of Gelatinous Doom.

When Phil the Pilferer steals the Golden Broomstick Magisword Award intended for Witchy Simone's famous younger sister, Witchy Sparkles, the Warriors lead the search in getting it back.