Han Cangbian

This is an incredibly vast continent. On this continent, there are thousands of races. Prodigies from all races are born, shining with the brilliance of genius. There are also many strong ones. But the human race is extremely declining. A young genius emerged from the desolate northern border. There is a secret method with endless variables, which kills all the geniuses of the alien race. In the end, the young man who has reached the peak cuts off the continent with one sword. From then on, the human race never declines.