The Labyrinth Worm is a monster who made a brief appearance in "The Limit." It is a dark purple, worm-like creature with bandages around some scrapes and holding a sword in its coils. The worm is among the many inhabitants of the Labyrinth. It is unknown whether Finn and Jake encountered it during their journey through the Labyrinth, though they walk near it while Finn is singing "Sing 'Cause Yo Mama Said." It appears to be completely walled off. It also appears on the episode's title card.