Dark Lord from Arad

There is a special kind of people on Arad, who are cursed by Kazan, the Lord of Destruction. This type of person is generally called a patient with Kazan Syndrome. Most patients with Kazan Syndrome die from the pain of the curse, but only a small number of extremely strong-willed people survive. This small group of people with strong willpower are active in every corner of Arad, and an even smaller group of people stand out from them, and these people are called ghost swordsmen by the world.