Sourdough the Evil Sandwich

Sourdough the Evil Sandwich is a character who first appeared in the episode "The Fancy Party". It was formerly Queen Entozoa until it was revealed to be some sort of spirit or energy being who possesses people's bodies for 1,000 years, but because of Wander, it is now a sandwich and now wants revenge on Wander, Sylvia, Lord Hater, and Peepers.