Illithis, the kingdom of shadows.

Illithis is a human kingdom, close to Than; they were both once provinces of the Thirvilis Empire.  Illithis is an empire who's aristocracy are shades, spellcasters who have fused themselves with black magic.  Illithis is a rigid police state, with a multitude of strict laws.  If someone breaks one of these laws, they are dragged away to one of the many dungeons, where your thrown into a little hole and forgotten.  Illithisians look much like Thans; tall, slender, narrow features, dark hair, and fair skin.  The shade emperors rule from the city Ceve, which is shrouded in an eternal twilight.  Order is kept in Illithis cities by the Ceve Skirmishers, a special order of city guards who fight with daggers and lurk in alleyways and on rooftops.  After the fall of the Thirvilis Empire, Illithis, Than, and Ullanis, all former provinces, remained and became sovereign kingdoms.  The first Illithis king, Sorlos 1, turned Ceve, an old military base town, into the grand capital city.  He also turned himself into a shade, which started the tradition.  Though it was Sorlos's grandson, Sorlos 3, that made all his nobles turn into shades as well.  Ceve is located in the foothills of the Frelor Mountains, the Frelors divide Illithis from the Gray Wastes.