Start with Sacrifices

My name is Zhou Zhe, an ordinary office worker who died suddenly from overwork. My soul traveled to a different world and became the mentally retarded son of a chief in a Mesolithic indigenous tribe. I originally planned to hang around and wait for death, but I was chosen as a sacrifice and almost died. However, I accidentally became the messenger of the spirit of the earth and sacrificed with others to build a new civilization. The former Arcane Empire gradually emerged from the ruins. Why was the glorious civilization once cut off? The soil that I thought was backward and feudal is now far more complicated than I imagined...