Non-Existent Person: I Overturned a Three-Hundred-Year Chess Game

Who made him? Who wiped his memory? Who planted the command "must become a vessel" in his body? He travels through martial arts, apocalypse, immortality, science fiction... Every world has a fragment of truth. But when he finally pieced together the whole picture, he discovered that he was not a key, not a container, not anyone's tool— He was the only variable in a scam that lasted for three hundred years.