The Marrow Desert is a regional wasteland stretching across broken basins, salt flats, and half-buried cities. Most settlements cluster around wells, salvage sites, and routes protected by undead caravans. Strange corpse-born peoples dominate public life, while living travelers survive as merchants, guides, and tolerated outsiders. Low magic persists through bonecraft, memory crystals, and unstable relic machines, making every ruin both a resource and a potential catastrophe.