A New Snake In The Shinobi World - Chapter 329 -

Shikigami: “Master, it's time to increase your magic power through sex tonight.”-----------------------PS：Shikigami is the term for a being from Japanese folklore. it is thought to be some sort of kami, represented by a small ghost.Usually shikigami are conjured to exercise risky orders for their masters, such as spying, stealing and enemy tracking.

As a promise, he went out into the world as an assassin. 3 years later, after becoming the Supreme Assassin, he gave up on everything he had and returned to the ranks of ordinary people. But one day, Kismet, a mystical game created by the National Research and Development had appeared.

Enigmatic hands, spectral frame, and one cunning strike just like the swing of the Grim Reaper. The Supreme Assassin takes on the mystical world, and how his legendary tales sets off, progressively ascending the altar to becoming the best.

- Description from Novelupdates

John Transmigrate to a cultivation world in a perilous situation as a war prisoner.But fortunately he also got a system that lets him upgrade everything if he has enough patience.