Adventure Time With Finn and Jake - The Great Birdman (S05E13) HQ

Finn and Jake get lost in the badlands, and are saved by Xergiok (voiced by Johnson), the former goblin king who was deposed by Finn and Jake in the second season episode "The Silent King". He claims to have turned over a new leaf after he lost his sight. However, once it is returned, he threatens to take over the goblin kingdom once again. Eventually, he realizes the errors of his ways and removes his eyes again.