Lolth is a demon and a goddess worshipped by the drow; she displays formidable power and great cruelty with an affection for arachnids. Goddess of darkness, drow, evil, and spiders (and assassins and chaos in the Forgotten Realms), Lolth has, through deceit and domination, garnered the ears of the dark elves and eventually established herself as their foremost deity, keeping them under her thumb by creating a society in which only the strong survive and her priestesses are strongest. Most servants who fail her (and there are many ways to fail the capricious goddess) are either slain or transformed into creatures called driders: centaur-like creatures that have spider-like bodies below their waists instead of a centaur’s equine features. Lolth is also served by a race of shapeshifting demons called the yochlol. In their natural form, yochlol resemble molten blobs of wax with large, glaring red eyes.
Lolth is a Chaotic Evil Intermediate Power. Her symbol is a black spider with the head of a female drow (and in the Forgotten Realms, hanging from a spider web). Lolth dwells in her divine realm of the Demonweb Pits, a demonic realm formed entirely of a single great fractal web, where she is served by legions of powerful mystical slaves. Lolth’s residence in this realm is a mobile iron spider-shaped stronghold. In the default Dungeons & Dragons cosmology, the Demonweb Pits are located on the 66th layer of the Abyss (although in the Queen of the Spiders supermodule, author David C Sutherland locates her realm on layer 65). In the current iteration of the Forgotten Realms campaign setting, the Demonweb Pits is a plane to itself. However, there appears to be some controversy regarding the status of the Demonweb Pits in that particular campaign: the 3rd edition campaign setting says that the Demonweb Pits are a separate plane, but in the novel Extinction by Lisa Smedman they are explicitly referred to as part of the Abyss, namely the 66th layer (as in the “default” cosmology). But, as seen by the end of the War of the Spider Queen series, it is shown that the Demonweb Pits had, while Lolth was “evolving,” separated and became its own plane.