Musashi Miyamoto had the green Legendisc in his possession, which he regarded as a "mystic mirror" with unknowable powers and so sought to seal it away. However, he was beset by the time-travelling "oni" Budora and Bakudora and the Legendisc was stolen. A few days later, another set of "clockwork dolls", the Swordbot Samurai Team from the future, appeared. Musashi, believing them to be league with the oni, attacked and demanded his mystic mirror back. Isami Tatewaki was able to diffuse the situation, explaining the true identity of the Swordbots and the Predacons that stole the Legendisc. After imparting some encouraging words to Isami about facing fear, Musashi ran off to confront the Predacons.
With the others following behind, Musashi found the Predacons, only to be swatted away by Budora when he attempted to attack. After the Samurai Team took care of the Predacons' Jaki minions, Musashi took another chance to attack, managing to stab Budora in the eye and causing the oni to drop the stolen Legendisc. After falling off, he tumbled away as all of the intruders from future were transported back to their time.