S1, E3: This time it's Onimaru prodding Yaiba for a duel. Only something is seriously off, not least the disturbing new horns sprouting from his forehead. Still, undeterred, Yaiba takes on the strange new Onimaru, but is dejected by how quickly the Fujinken and its wielder can dominate him. To stand a chance against Onimaru, Yaiba's dad explains, he must get hold of another maken known as the Raijinken. To find it, Yaiba heads to Mt. Tengu to meet the famous swordsman Musashi Miyamoto, who also happens to be four hundred years old...