After Guarding the Imperial Mausoleum for Thirty Years, I Am Invincible

He traveled to the world of gods and demons and became a useless prince of the Xia Dynasty who was demoted to the imperial mausoleum. Without the emperor's order, it cannot be obtained. Fortunately, if the system is activated, as long as you protect the imperial tomb from damage, you will receive heaven-defying rewards! "You guard the imperial mausoleum for a year and gain insights into the martial arts of your ancestors." "You guard the imperial mausoleum for five years and obtain the innate Taoist body." "You guard the imperial mausoleum for ten years and gain a hundred years of cultivation." Thirty years later, the demon god descended from the sky. There was no one in the land of Daxia who could defeat him, and everything he saw was ruined. The human race is in danger. At this time, the demoted prince walked out of the imperial mausoleum. With a wave of his hand, the demons were wiped out. …