Reborn Demon System

"Ding—The Demon God system is successfully bound." As this cold system synthesized sound sounded, Yin Han came to a strange world inexplicably. "System? I, the supreme being of the Immortal Realm, actually equipped me with a demon system? Are you looking down on me?" Yin Han couldn't help but secretly slandered in his heart. In this apocalyptic era of depleted resources and depleted spiritual energy, let's see how Yin Han strengthens himself, moves across the city, and kills all invading enemies...