Hundreds of years have passed, and his disciples have become three, and he has become a saint.
But the disciple he took hundreds of years ago fell into the devil's path and was beyond redemption.
His former favorite disciple rebelled against the teachings, but he did not stop him. Until the end, he was killed by the apprentice he had raised, and he was not blamed.
After rebirth, he vowed to save this demon king and make him correct his evil ways.
Purpose: To change the evil ways of evil and return them to the right way