Grandmaster of Demonic Cultivation - Mo Dao Zu Shi

As the grandmaster who founded the Demonic Sect, Wei WuXian roamed the world in his wanton ways, hated by millions for the chaos he created. In the end, he was back-stabbed by his dearest junior brother and killed by powerful clans that combined to overpower him. He incarnates into the body of a lunatic who was abandoned by his clan and is later, unwillingly, taken away by a famous cultivator among the clans—Lan WangJi, his archenemy.