You Have Become a Demon Cultivator, and You Still Talk to Me About Morality?

Lu Yuan travels through the fantasy world, and encounters the Demonic Nascent Soul Ancestor at the beginning who seizes his body. When he is about to die, he swallows the opponent's remaining soul with his backhand. Not only does he obtain a thousand-year strategy, but he also obtains the opponent's lifetime experience of the Demonic Dao, including the Demonic Dao's top Nascent Soul techniques, Nascent Soul magic weapons, and lost secrets... Is it safe to turn back? I have become a demon cultivator, and you still talk to me about morality? Wherever An is, I'll just kill him.