Ancient Demon Lord, Slaughtering the Heavens

Gu Changge once had his Primordial Divine Body stolen by Liu Ping, the Holy Son of Wuji Sect, to protect his family, becoming a laughingstock. After enduring humiliation for three years, he accidentally activates the Demon God System. He first kills the traitor Gu Qing, then crashes the Wuji Sect banquet, and later incites infighting among enemies in a secret realm, continuously leveling up. Finally, at the alliance meeting of sects, he exposes Wuji Sect's crime of stealing his divine body, unites the sects to destroy Wuji Sect, slays Liu Ping, Liu Nanjie, and the ancestor Liu Taixu, ascends as the Ancient Demon Lord, protects his family, and finds love with Zhao Yanran.