Part roleplaying game, part fantasy simulation from newcomer Ertain. Your ultimate goal is to become Lord of Summoner. You play as Case, a young magician apprentice, who heads off on an adventure. Call upon a variety of monsters to fight in battle, both against in-game opponents and with live opponents via the Game Boy Advance link-up cable. Monsters emerge from Generators that are placed on the game field; to defeat an opponent summoner, you must destroy its Generator.