After crossing the Undersea Cave, the party arrives inside the castle. They venture inside in search for Sei-Ryu. The party makes it to the top of the castle, and arrives in a room filled with crystal orbs. Among the fakes, they find the real orb. Not long after finding the real orb, Sei-Ryu appears before the party asking who stolen his orb. They fight and the party comes out as the victor of the battle. With the red orb in their possession, they set out in search for Ryu-O who is in possession of the blue orb.