A Cultivation Big Shot? I Level Up by Spending My Lifespan!

He uses his lifespan to deduce martial arts. Chen Xuan transmigrates into the body of a divine constable in a fantasy world, only to discover that this constable has been colluding with evil forces!

To stay alive, Chen Xuan uses his position to plunder their lifespans and deduce martial arts for himself.

In the end, Chen Xuan discovers that his lifespan keeps growing and can never be used up. The continent has one fewer divine constable, and one more immortal Martial Saint.