Dhaos~Tales of Phantasia
Dhaos is the main enemy in Tales of Phantasia. Hailing from the planet Derris Kharlan, he traveled to Aselia in order to retrieve a Mana Seed that could save his homeworld from mana depletion. His objective was threatened, when Midgards started to magic in Magitech. This drained away mana faster than it was producted. Discovering this, Dhaos set out to slaughter everyone involved with the magitech.
Later he was defeated by group of young heroes, the main characters of the game.