Xuanyuan of Immortal Sword Comes Out

Thousands of years after the war between humans, gods and demons, the three realms have flourished without interfering with each other. Until Li Xiaoyao brought the Xuanyuan Sword and met Wei Xue, the princess of the Lich Kingdom, chaos reappeared; the three realms were unified, and the prophecy passed down from generation to generation that chaos would spread was about to come true. What kind of emotional entanglement will the two have, and how will they save the Three Realms?