The Legend of Sword and Fairy

A magic sword carries the son of the God of Death through thousands of years to the ancient times. The six realms are not divided and the world is constantly fighting. The magic sword changes the human physique of young Li Xiaoyu and transforms into a demon. However, he is hunted by the humans. His favorite senior sister is humiliated and commits suicide. From then on, the boy embarks on a path that goes against the will of all ethnic groups in the six realms of heaven and earth in order to save his senior sister!