Deo Esari is the mountain kingdom of the Farlands, the easternmost of the three elven realms bound by the Three Kingdoms Treaty, and it sits on the single most valuable stretch of ground in the known world. The Kelder Mountains are a titan graveyard. The bones of the first beings Azus made lie in the rock here, and titan bone is the only material that holds Deoric charge without decaying, which makes it the required medium for all handmagic and charged ritual. Nineteen parts in twenty of the world's titan bone come out of Deo Esari. Everything about the kingdom follows from that one fact.
Geography
The realm occupies the bracket-shaped Kelder range along the eastern edge of the Farlands, alpine country of high peaks and narrow valleys where settlements cluster wherever the harvesting was good rather than wherever the land was kind. The Ver Pyur rises in the north near Isyherius and runs south; smaller mountain streams feed the lowland rivers to the west. The range's southern foothills break toward the Mathavia Mountains, the weathered boundary range that walls the Farlands off from the Giant Lands beyond. Those southern foothills are the abandoned country, closed for two centuries and treated below.
The titan-bone realm
Deo Esari is governed by the Titanic Priesthood, a theocratic order that is both the kingdom's government and the keeper of its bones. The priesthood works the titan seams under rite, forbids the quarries to outsiders, and lets bone leave the mountains only by its own measure. Material so sacred it never leaves the confederation except through defectors, the saying goes, and the priesthood hunts defectors hard enough to make the saying mostly true. The order's full character, and the long lie at the center of it, are in its own entry. What matters at the scale of the kingdom is that a single institution controls both the supply and the price of the one substance every Deoric working in the world depends on.
Settlements
Mountain living concentrates people into towns and cities rather than scattering them across villages. Thillesari, in the central range, is the capital and the seat of the priesthood's sealed archive. Isyherius is the northernmost city and the source of the Ver Pyur. Mysaneas is a secondary administrative center, and Leleth Serine a major harvesting hub; Ryhaneas, Eyslon, and Iyathelneor hold the range between them. The southernmost living settlement sits just above the closed country, close enough that its people grew up under the warning markers.
The abandoned south
Two hundred years ago the southern harvesting grounds emptied in a single season. The villages of the southern foothills, across Eshbya Hills, Tomgryir Eror, Carya Nairn, and Kirthdron Soytas, were struck by a wasting that killed the grown slowly and left children born wrong, and within a year the priesthood evacuated everyone still standing. The settlements remain intact behind warning markers, belongings where the evacuation left them. The priesthood's public account names only a contamination of unknown cause, sealed in the archive at Thillesari, and a quarantine that might lift if the ground ever proved safe.
It will not prove safe. The codex account of what actually happened, and why it can never fade, is the Southern Wasting; the short of it is that a harvest crew cut into a titan that had not finished dying, and the priesthood buried the cause to bury the liability. Closing the south cost Deo Esari close to half its yield and drove titan-bone prices to heights they have never come down from.
The pressure
That price is the kingdom's whole present tension. The northern veins thin year by year, demand never slackens, and the cost of bone climbs without rest, so the argument to push back into the south grows louder inside Deo Esari and among every power that buys from it. The priesthood refuses, and gives caution as the reason. Within the confederation the kingdom is insular and tradition-bound, siding most often with Illron against Lenora on matters of old custom, and its monopoly is exactly the leverage Lenora's landholders have begun, quietly, to resent. That resentment has already taken a drafted shape: a Lenoran secession that would leave the confederation to buy Deo Esari bone bilaterally, at a price its own rules forbid. The realm holds a line it will not explain, over ground it will not let anyone walk, atop a secret one of its own priests has already mapped in full.