Magic Emperor is a Manga/Manhwa/Manhua in (English/Raw) language, Action series, english chapters have been translated and you can read them here.
Zhuo Yifan was a magic emperor or could be called a demon emperor because he had an ancient emperor’s book called the Book of the Nine Secrets, he was targeted by all the experts, and he was even betrayed and killed by his students. Then his soul enters and comes back to life in a family servant boy named Zhuo Fan. Because some demonic magic is holding him back, he must unite the child’s memories and cannot ignore the family and the mistress he serves. How can he lead this descending family back to the pinnacle of this continent!