Long ago, Kubilai was the former ruler of the Mu Empire, corrupting the hearts and minds of humanity long ago until the warrior Shaider came and vanished his evil while slaughtering his son Rahu and daughter-in-law. Losing his snake-armed body in the process, Kubilai was reduced to a giant, golden head embedded himself in the wall of the Fuuma Palace's throne room where he rules the Fuuma.

Learning that the resting place of his ancient foe and the prison holding his body were found, Kubilai went to great lengths to ensure his weakness, his third eye, would not be revealed. When Shaider storms his palace, Kubilai unveils his new robotic body and takes Shaider into the Fushigi Dimension for an epic final battle. After detaching from his robot body, Kubilai met his end when Shaider plunged his Laser Blade into Kubilai's third eye, then used Shaider Blue Flash to finish him.