This place wasn't just beneficial to Martial Kings; it could also help Martial Emperor level experts comprehend the laws of space much more quickly.
In addition, Celestial Yin Valley was uniquely located and contained many peculiar treasures.
As a result, countless Martial Kings and Martial Emperors were constantly training and fighting inside it at any given moment.
However, despite Celestial Yin Valley's wonders, it had one major problem: the black mist inside was harmful to Martial Artists. Inhaling too much would cause mental derangement. In mild cases, it would lead to cultivation deviation; in severe cases, one would become a mindless, raging lunatic.
In the past, the major powers of the Profound Domain had gone to great lengths to disperse the black mist, trying various methods, but they all ultimately failed.
