The Kelder Mountains are a graveyard. When the Ezz Rift drove the titans mad, some of the first beings Azus ever made came to the western edge of Upoceax to die, and the bracket-shaped range that walls the eastern Farlands grew up over their bodies. Their bones are still in the rock, pale structures the size of ridgelines, harder than any steel and exactly as they were when the titans fell, because titan bone does not weather or decay. This is the one fact that matters about the range. Everything Deo Esari is, it is because of what lies buried here.
The harvest
Titan bone is the only material that holds Deoric charge without rotting, which makes it the required medium for handmagic and charged ritual and the most valuable substance most traders will ever touch. Nearly all of it in the world comes out of these mountains. The Titanic Priesthood works the seams under rite and lets the bone out by careful measure, and the settlements of Deo Esari string along the range wherever a vein ran rich enough to gather a town. Cutting bone from a titan is slow and dangerous even where the dead lie quiet. Ordinary tools will not scratch the surface, and the priesthood guards the methods that will.
The quiet south
The dead do not all lie quiet. At the southern end of the range, where the foothills break toward the Mathavia Mountains, the ground has stood closed for two hundred years behind the priesthood's warning markers. The villages there emptied in a single season of the disaster the priesthood will name only as a contamination, and the markers have kept the living out ever since. What sets the south apart from the rest of the range is the thing the priesthood has buried deepest: not every titan in the Kelder Mountains finished dying, and one of them, opened by a harvest crew, is still bleeding into the ground. The full account is in the Southern Wasting and in Deo Esari's own entry.