[No transmigration, no System; traditional fantasy. Please don't read if that bothers you.]
I kill, you deliver.
Ten thousand years ago, during the war between humans and gods, the Human Immortal Emperor was on the brink of death.
A holy monk saved him at the cost of his own life. The emperor and the monk both became divine souls, drifting through the world for ten thousand years.
Ten thousand years later, the two souls coexist in the body of an ordinary man, Xin Shi'an.