The Kol'asan Mountains (Sword-like Mountains) is an imposing mountain range that acts as a natural boundary between the T'chaillish prairies to the east and the Besantu forests to the west.  Due to the impassable nature of the mountains, very few people live on the slopes themselves though there are a few fortresses guerrisonned by either side.

The Bardu-T'chaillish monestary of Luaelafar is also located within the Kol'asan range.