Ten thousand years have passed since the first-generation demon warrior Saint Rodel led the remaining humans to fight against the demon tribe. Although humans have established a firm foothold with the help of Rodel's defense line in the east of the mainland, the population is only the original One-fifth of the continent, the ground is only one-sixth of the continent, and the rest is under the control of the devil.      People in later generations called Saint Rodel the Holy King. That war was called the Catastrophe, and the former continent was also renamed the Land of Disaster. Although humans have cultivated for ten thousand years, they are still weak compared to the demon tribe. Only the Rodel defense line is their hope!