If I Can't Become a Demon Lord, I'll Have to Attain Sainthood Through Merit

Lin Xiu transmigrates into the cultivation world as a lowly demonic cultivator whom everyone wants dead, only to discover that he can travel back and forth to a world of corpses and ghosts... Demonic corpses? Just resources! Evil ghosts? Aren't they perfect materials for ghost banners? Can't raise my cultivation level? No problem. I'll just blood-sacrifice a hundred thousand demonic corpses. But what Lin Xiu can't stand most is this: I've killed so many people, so why does Heaven keep sending me merit? Years later, a host of cultivators arrive to take down the demon, but Lin Xiu simply reveals the rings of golden merit behind him and asks, “Where's this demon you're talking about?” P.S. This is actually an unconventional farming-style story.