Iggwilv is said to have two forms, one of which is that of an old crone (said to be her true form), and the other, a human female of dark beauty. In the latter form, Iggwilv has long black hair and pale skin. It is said none who have seen her in her true form still live.
She has many alternate names. On Oerth she has been called the Witch Queen of Keoland and the Mother of Witches.
Iggwilv first appeared in Ket some 300 years ago, in the 3rd century CY. After being driven from Lopolla for plundering the Vault of Daoud (where it is assumed she acquired Daoud’s Wondrous Lanthorn), she made her way to the Free City of Greyhawk. Iggwilv managed to imprison the demon lord Fraz-Urb’luu. Iggwilv spoke to the imprisoned demon lord, and learned many secrets. Shortly thereafter, Iggwilv is thought to have written The Demonomicon during this time, a codex of fiends from the abyss.
Iggwilv traveled to the Crystalmist Mountains, in the unclaimed wilderness near the Valley of the Mage, to a twisted mountain now called Iggwilv’s Horn, said to be the last resting place of the ancient mage Tsojcanth. There, using the lore and power she had stolen from Fraz-Urb’luu she bound Tsojcanth to her service, using him as her slave for generations.
Iggwilv next appears in the historical records of Keoland in 460 CY. Using what she had learned from Fraz-Urb’luu Iggwilv summoned and imprisoned the demon lord Graz’zt. She managed to seduce the demon lord into helping her with her plans of conquest. In 480 CY, she assembled an army and attacked Keoland from her base in the Crystalmist mountains known as the Lost Caverns.
Several decades ago when the Archmage Iggwilv brought the Marches of Keoland
under domination, considerable store of treasure was taken from that
place and sequestered by her somewhere in the no-man’s-land between the Duchy of
Geoff and the forsaken Sea of Dust. Among her loot were several rare and prized
tomes and the fabled lamp known as Daoud’s Wonderous Lanthorn.
When Iggwilv was slain by the demon Graz’zt, and her minions scattered by an uprising
of oppressed subjects, rumors began to spread regarding where the Archmage’s
treasure trove was located. Considering the cartloads of precious metals and gems
taken away during the overthrow, it is not surprising that most of these whispered
suggestions were ignored as spurious. However, the books and the Lanthorn were
never found, and the rumors did reach some interested parties, for several expeditions
have sought to locate these items, but the parties were either unsuccessful in their
attempts to find the locations of the Caverns of Tsojcanth. (where the most reliable
rumors claim the treasure rests) or else failed to return.