Kamen Rider Kuuga (2000)

Long ago, the Grongi Tribe terrorized the Linto (リント Rinto) until a warrior named Kuuga appeared and defeated the Grongi, sealing their leader within a cave. In the present day, a multi-talented man named Yusuke Godai finds himself linked to the mysterious stoned belt that was found within the excavated cave as the Gurongi are resurrected and resume their murderous game on the descendants of the Linto, humanity itself.