300 Years in the Doomsday Coffin

He went down to the grave to save people, but was trapped in a tomb that could heal injuries. He stayed there for three hundred years. When the coffin lid was finally opened, the earth had already changed. Humans have put on mechanical bodies, beast herds and insect nests are fighting for the wilderness, and out-of-control war machines are hunting the living. Some people say he is a good doctor, others say he is a madman.