The lich

The Lich (ugly right?)

The Lich was first defeated by the legendary Billy.Billy trapped him in a giant piece of amber.The Lich first appeared in "Mortal Recoil".He uses one of the strongest kinds of magic "Dark Magic".He leaves a trail of death whereever he goes.Finn beat him also on the episode "Mortal Folly".Finn used the power of "liking someone a lot" to defeat The Lich.The Lich Possessed Princess Bubblegum in the episode "Mortal Recoil".