Spirit Martial Firmament

He tempered his body at three, reached the ninth level of body tempering at four, entered the True Martial Realm at eight, and became the strongest among his peers at sixteen. Beating older opponents a level above him was child's play. He was the brightest genius in the Qingxu Realm, yet only a villain in a book. To win a beauty's smile, he made countless enemies, until the protagonist defeated him and left him crippled. He was waiting to die when the story took an unexpected turn: for some inexplicable reason, I, the author, became him inside the book...