The Wang Clan of the South has divine arts, dominating ghosts and deities with their mastery over yin and yang.
Within the Wang Clan, only those who are proficient in yin-yang arrays and capable of commanding spirit arts could be considered true descendants of the Wang Clan. Upon reaching a certain realm, they would even be called Yin-Yang Masters.
However, the path to cultivating yin-yang divine arts has extremely high barriers, and the first among them is the ability to see the filth unseen by others, otherwise known as the yin-yang eye commonly spoken of by mortals.
The yin-yang eye can be obtained through acquired cultivation, but it would waste a great amount of time and neglect the golden years of youth. If one considers a length of a hundred years, a decade or so might not seem too long, but the actual experience can feel profoundly different.