The Mistspawn Mountains were snow-capped mountains with vast trees on the lower side. They spanned the diagonal of the entire continent and were the thing that divided the continent into two sections. People from either section, usually the mortals and lower realm cultivators failed to find a way to get to the other side and were usually stuck in one place.
There was a small section among the whole range, a group of 5 mountains in total, which were taller than the rest. They stood tall and high as if reaching for the heavens themselves.
In the flat world of Pillheaven, those mountains could be seen from far and wide, even by the billions upon billions of mortals that lived there. From a long time ago, people believed those few mountains to be the home to something more than just trees and animals.