Lolth
Lolth The Demon Queen of Spiders, Demon Queen of the Abyss, Queen of the Demonweb Pits; Weaver of Chaos; the Mother of Lusts; the Dark Mother of All Drow.
Spider goddess worshipped by the Drow. Evil.
In Velkynvelve, the adventurers battled with Ilvara, priestess of Lolth, and Asha (seemingly an acolyte or priestess as well) who was preparing a rite before a shrine in the form of a giant spider statue.