The legendary general Yamanouchi Kagetora, intent on avenging his father's death, has devised the most ingenious weapon ever to hit the medieval battlefield: the Odama, a gigantic ball powerful enough to destroy whatever it strikes - friend or foe. Players use the Nintendo GameCube Mic to direct soldiers out of the Odama's way and into the fray, and prove that they have the skills to back up the power of the Odama.