Evil smart protagonist

I working on a novel about a pure evil smart mc. It's very hard to write a smart mc so I have been going through a lot of considerations on his path. But anyway I cant wait to focus about his exciting adventure, scheming powerful people than him, slowly breaking through an op level and absolutely no harem. Although it is fun, the idea about an mc with no sense of morality, values and kinship is still against the norms and beliefs of the ppl in the society so it was a challenge and Im a lil bit afraid of the consequences