The Demonweb Pits was originally the 66th layer of the Abyss. By the end of the Silence of Lolth, Lolth had moved her domain in the Demonweb Pits to its own planar space. The realm is ruled over by Lolth, the primary drow deity, who resides in a huge iron fortress that moves under its mistress's will on spider-like legs. Her deific consort Selvetarm once lived with her there until he fell before a wielder of the Crescent Blade. Now every creature who resides in the Demonweb Pits answers solely to Lolth.