Thousands of years ago, the Demon Lord mastered a secret art and led an army to unite the Three Realms. The realms were plunged into a war that raged on. In the darkness, the Celestial Clan suffered devastating losses. Unable to bear it, the leader of the Celestial Clan sealed his daughter's spirit to preserve their bloodline, then ordered an elder to take her down to the mortal realm. Once there, the elder entrusted the child to the Spirit Maiden Clan to raise. Their leader agreed to bring her up, and only then did the elder leave with peace of mind. Before long, the Celestial Clan was wiped out, and the Demon Lord united the Three Realms, which became the realms of humans and demons.
