In the ancient era, thousands of races competed for hegemony. The first ancestor of the human race awakened the blood of the nine ancestors in the blood fire and suppressed the world. However, one of the "spirit-devouring ancestral bloods" was feared by the other eight ancestral bloods because it could smelt the origin of bloodlines of all races. They joined forces to label it an "evil bloodline" and executed the entire clan.
Three thousand years later, it was spread in the world that those who bear "sinful blood" are sins that cannot be tolerated by heaven, and they must be killed on sight.
