I Use One Sword to Challenge the World

Tianyuan Continent has pure source power, and everyone can shine with their own brilliance. The world is not perfect, and the invasion of alien races from outside the territory allows the five races to put aside their past grudges and fight against the enemy together. To this day, the alien race has been suppressed and countless warriors have been sacrificed in exchange for peace and stability in Tianyuan. The alien race is ready to take action, what will happen to this world? Let's look at the young man.