Baten Kaitos: Eternal Wings and the Lost Ocean

An original roleplaying game for Nintendo GameCube from the team behind Xenosaga. The game makes heavy use of cards for everything from fighting battles to purchasing items. Cards are actually a central part of the story as well, as they are holders for "Magnus" which is short for "Magna Essence." Magnus is the true nature of all things throughout the world, including swords, magic spells and even apples that are gathered in the town in which your adventures start out. A real