Supreme Sword Emperor of Swordsmanship

This is the world of swordsmanship, where everything practices swordsmanship. Thousands of years ago, a sword master was born in the human race, demon race, and vampire race, which established the status of the three major races today. Times have changed, the sea has changed, and the human race has not been born for a hundred years. The human race is in danger, but other races are ready to take action. There are rumors in the world that a fourth sword master will be born, and the world of great chaos is coming. Facing the coming era of great chaos, what is the fate of the human race? Was it outlawed by the emerging race and simply extinct? Or is there someone who can turn the tide when the building is about to collapse and create greater glory? None of this is known.