Legend of the Demon God: Shen Xiao's Rebirth

Rebirth of the protagonist: Shen Xiao (formerly known as Shen Fei), the young master of the Holy Family, was reborn after his family was destroyed by Nie Li and his soul was devoured by the Holy Emperor, and he awakened dual memories: - The failed ending of being a villain in his previous life - The "Holy Demon Book" obtained by accident (same origin as the Book of Time and Space Demon Spirits but with opposite attributes)