Demons, Devils, and Dragonsbane
The Grey Mountains are the third-largest group of mountains in Gamon. They are home to a variety of gargoyles, devils, and several Lawful-aligned and evil-aligned creatures that exist on the Material Plane. The Grey Mountains are the location of Belyn, which is frequently attacked by raids organized by creatures living in the mountains.
It is rumored that these mountains house a group of Lawful-aligned warlocks that oppose those tribes living in the Mountain Pass, but other than the abundance of devils in the region, there is no concrete evidence to prove this theory.