Thanatos is the final boss in this game. He first introduces himself to Julio Sven and Caro Orange before they fight the possessed Cress Albane. After this, he continues his attack by controlling Farah Oersted and one of the Legunia's town guard, Mendel. He also controls a zombified Leon from the future to confuse the heroes, but his plans are thwarted when he is defeated by Leon Magnus. He makes his first appearance in the Mirage Palace. There, he is defeated by the heroes but escapes at the last moment. Thanatos attempts to lure the heroes inside of the legendary "Dragon Labyrinth", where he would be able to unleash his true power. In the end, however, he is overwhelmed and ultimately destroyed.