Kefka Palazzo
Kefka Palazzo is the villain from Final Fantasy VI. Kefka starts out as little more than a background character. His persona is so laughable that the hero leaves him stranded in the desert instead of destroying him. This is all a ruse — by the time you encounter Kefka again, he has killed thousands of people and he gets you to help him, all because he is bored. He also ends up betraying his alliance members to become the God of Magic, the final boss of Final Fantasy VI. He is by far one of the most sadistic and psychotic antagonist in vide-ogames.