“If proof were ever needed that some darkness best left undisturbed lurks amongst those haunted stars, then I could offer no better than those dead and dry worlds. To the wise they would suggest that curiosity is indeed the greatest of sins.”
—Inquisitor Marr, speaking of the discoveries of Rogue Trader Sebastian Winterscale
The Egarian Dominion was once a populous xenos domain that spanned a handful of close stars. Many millennia past, the alien civilisation that dwelt in this domain fell victim to a nameless doom that left only empty, desolate worlds and crumbling structures in its wake. The principal worlds of the Dominion are dry, cool desert planets, covered by tightly packed structures that form a vast maze in three dimensions, walls and corners hundreds of meters high and extending in belts for thousands of kilometres across the desert plains. These claustrophobic xenos complexes are buried by windblown sand and dry soil, their borders ragged cliffs that mark the edge of lowland deserts. Egarian building materials glisten with rainbow light as though oily, even as they crack and crumble with age. They somehow channel the light of Egarian stars, and even the deepest regions of the xenos hives are lit with a disturbing, shifting glow. The passageways are cramped for humans, and the hive mazes are empty, as though the xenos and almost all their works simply vanished overnight. The only sound is the moaning of the wind as it blows through enclosed maze-spaces and across desert outcrops.