This Bastard is Too Competent

He was the one who would become the greatest monarch in history.

"The spot you had climbed once, there's nothing you can't know if you've already been there."

After possessing the body of the Third Prince—branded a useless wastrel—he determines that he will neither die nor be defeated. With knowledge of the entire game from start to finish, he sets out to change his fate and rise to the top.