The Mightiest Regent, I Rule the Court

Modern youth Shi Yi time-travels into the palace and stumbles upon the deposed empress, Xiahou Siliu, in the cold palace, accidentally revealing his male identity. Xiahou Siliu tells Shi Yi that Emperor Aotian wiped out her family to seize the Xiahou clan's Overlord Divine Art, and that he became a eunuch due to practicing a fake version. The true art requires co-cultivation with others to reach perfection. Shi Yi allies with Xiahou Siliu, uses the divine art to win over Ning Xin'er, and rapidly boosts his power. He unites Xiahou's old followers to eliminate court traitors, and after many trials, finally masters the art. Leading his forces into the palace, he slays the tyrant Aotian and ascends the throne as the new emperor.