Other people cultivate immortality with talent. Qin Zheng cultivates immortality with the dead.
In his previous life, he was an elite soldier known as Yama, sent to hell with a single bullet from one of his own. When he opened his eyes, he had become the lowest-ranking sword trainee in an immortal sect. The sect treated him as expendable, and the clans treated him as prey. All he had was a Heaven-Devouring Sword Bone that could consume corpses and remnant souls, and the ability to calculate how to escape a deadly situation, honed as a veteran of the battlefield.
He fought his way out of a blood pit and into the outer sect, devouring his first corpse and taking in his first dose of karmic evil. When people asked why he was so ruthless, he only wanted to survive long enough to go home and see his younger sister.
When he discovered that the so-called Sword Bone inheritance was nothing but a plot to possess his body, he decided he would no longer be a pawn. He would climb to the heavens on the bones of those who played the game.