Me: The Dark River's Top Assassin

Mu Feng transmigrates to Beili, a dynasty that never existed in history.

He becomes Xie Sandao, one of the strongest young assassins in the Dark River.

He awakens a contract-taking System. The more contracts he takes, the stronger he gets. He can even become a sage or an immortal?

Xie Sandao: “I'm an assassin. I just need to be strong enough. Why would I want to become an immortal or a sage?”