Since ancient times, people have divided good and evil into two major factions. What they believe in is the unchanging Bai Yu, who is a sacred, noble and inviolable existence. The Bai Yus have also been deeply worshiped by people for a long time.
The faction that is completely different from Bai Yu is Heixuan; they are evil, bloody and murderous; they are dirty and despicable existences.
The descendants of saints who live in the sanctuary will be sent to Lingxian Terrace at the age of 15 to seek affiliation with them. Then he is sent to the fairyland or its demonic realm to perform his priestly duties. Of course; if you are unlucky enough to become one of those "mortal races" that have never experienced mutations for thousands of years, you will be abandoned on the Lingxian Stage and fall into the "mortal world".
Concept: Everything has its dark side