My Plug-In in the Prehistoric Era Is Tongtian

He died unexpectedly and had a system in his body. He became a prehistoric human race, practiced fantasy magic, and fought to prevent the human race from being slaughtered at will. However, he later discovered that his system turned out to be the leader of the Tongtian Cult! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.