Manga information: I Really Don't Want to Learn Forbidden Spells

For Ning Feng, an infamous underachiever, this will be his third time taking the awakening exam. When he awakens as a one-star -- the lowest possible rating -- everyone laughs. He can't understand why his new skills talk about "forbidden spells" and "dark power." He isn't an evil dark lord, but wow! Who knew forbidden spells could be so powerful! These skills are so cool, but they emit tons of dark power. There's a new source of dark power in the city and Ning Feng must get stronger before anyone realizes that its him.