Fantasy: at the Beginning, Everyone Was Copied and Killed

As a martial arts champion, Jiang Xuan had just traveled through time but was possessed by a dead man and couldn't move. And the people outside are about to be raided and beheaded? The sound of heads rolling down around me kept coming, and it was my turn next! Dear veterans, how should we break this game? Waiting online! Quite urgent! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.