Ulgu, the Realm of Shadow, is a labyrinth of mist, illusion, and half-truth, the twilight twin of radiant Hysh. Nothing here is quite as it appears: distances lie, reflections scheme, and the grey fogs shift to swallow paths, cities, and armies whole. Its magic is the shadow-lore of deception, secrets, and misdirection, and it seeps into all who linger until even their own memories turn treacherous.
The realm is a nested puzzle of veils and false horizons, shifting regions folded through one another like the chambers of a conjuror's box. Travellers trust nothing, for a friendly road may be a predator's tongue and a familiar face a borrowed mask. In Ulgu, knowledge is the only true coin, and it is never given freely, only stolen, bartered, or bled for.
Ulgu is the demesne of the shadow-god Malerion and his mother, and here too dwell the murder-cult aelves of the Daughters of Khaine, who worship the shadow-bound remnant of the old god of war. Their blade-covens dance through the mists, trading illusions and assassinations, and few realms breed such beautiful, bloody treachery. To Ulgu also come the spies, exiles, and hunted fugitives of a hundred realms, seeking sanctuary, vengeance, or the arts of deception that only the shadow-realm can teach, and the wisest of them heed the old warning that to study Ulgu too closely is to be studied in turn by things that watch, unblinking, from the mist.
Among the gods of the Mortal Realms, Malerion schemes from Ulgu's deepest shade, and though the realm nominally leans toward Order, it can never be wholly trusted by anyone. Ulgu defines its twin Hysh as surely as darkness defines the light, and those who master its shadows gain power terrible enough to unmake kingdoms with a whispered lie.