Mount Desolation was located to the south of the Qing-Yun Sect, sharing the same mountain ranges as the great Taiheng Mountain. It was hidden from view amidst a vast sea of trees and tall bushes, and it would be difficult even for someone from the Qing-Yun Sect to find its exact location without a Positioning Talisman. Since this was the location where the beast king was sealed, the entire area had been contaminated by Demonic Qi over the past hundreds of years, creating a large sphere filled with mutated beasts and plants.
Of course, in a certain sense, areas like this could also be seen as a land rich in resources. Killing the beasts within would give access to their beast cores, and if these mutated plants were used correctly, most could also be called spirit herbs. As for the beast king sealed at its center, it was viewed as the catalyst for all of this.