Queen of Air and Darkness

The Queen of Air and Darkness was the fey deity of magic (especially illusions), darkness, and murder. Her long-lost true name was never spoken among the fey. Her unholy symbol was a black diamond. The Queen of Air and Darkness was a bodiless, invisible being, but she could be perceived magically as a faerie with pale, angular features, blood-black eyes, and a mane of black hair. She was beautiful, but hers was a terrible, eldritch beauty that chills the bone. The Queen was cold and utterly emotionless.

The Queen of Air and Darkness was the sister of Titania, once a princess and heir to the Seelie Court in the deep sylvan realm of Ladinion. The evil Queen, her once bright spirit corrupted and dead, hated and opposed Titania's Seelie Court and everything they stood for. Because she embodied the corruption that can take root in the heart of the elvish race, Corellon Larethian, Erevan Ilesere, Rillifane Rallathil, Sehanine Moonbow, and Solonor Thelandira also considered her an enemy. The Queen's Unseelie Court could be found on the plane of Pandemonium. There, the goddess ruled from a throne of shadows. Her court was filled with evil, twisted fey, elves, and undead. Hell hounds and yeth hounds slavered at her insubstantial feet. The Queen of Air and Darkness was served by unseelie sprites, quicklings, evil elves, and bramble faeries, among others. The Queen of Air and Darkness was blamed with the creation of all evil fey races, including quicklings, forlarrens and spriggans.

Relations
The Queen of Air and Darkness reigned in the Unseelie Court, the foes of the Seelie Court. She was opposed by the elven deities of Seldarine, namely Corellon Larethian, Erevan Ilesere, Rillifane Rallathil, Sehanine Moonbow, Solonor Thelandira, and Angharradh. To them, she personified the corruption that could grow even in those of fey lineage.

Auril the Frostmaiden was believed to be synonymous with the Queen of Air and Darkness by some communities of fey, such as those of the Shiverpine Forest in the Deep Wilds. However, after the Sundering the Queen of Air and Darkness was merely impersonating Auril so as to gain more followers on Toril.

Worshipers
She was served by unseelie fey, including faeries, bramble faeries, quicklings, and spriggans. She was also known to have a fondness for yeth hounds and hell hounds.

The glouras, fey beings of the Underdark, had ties to the Queen of Air and Darkness and the Unseelie Court.