Super Crazy Swallowing

Gao Xuan traveled to another world and became a useless slave. This slave secretly had an affair with his old sweetheart, and had an affair with another female slave... After killing the first person, Gao Xuan got a system of devouring all things, which he could use to improve his cultivation. However, this system could only swallow some very weak beings and dead objects. By chance, Gao Xuan escaped, but his old sweetheart was still there as a slave... In order to quickly improve his cultivation and save his old lover, Gao Xuan began to steal corpses in other worlds, dig up other people's ancestral graves, and then slowly devour them...