I Cultivated A NemesisI Cultivated a Nemesis; 我培养了宿敌; Wo Peiyangle Sudi

The demon king possesses a return ability, but is continuously killed by his nemesis, finally, he chooses to return, but then becomes the older brother of his nemesis. He decides to use his abilities and raise his nemesis to become useless, but this began to go in an unexpected direction