What is "iggwilv"

Iggwilv is a fictional wizard from the Greyhawk campaign setting for the Dungeons & Dragons roleplaying game. She was created by Gary Gygax and was named one of the greatest villains in D&D history in the final issue of Dragon.

Iggwilv is characterized as a selfish, evil-aligned magic user with much power and a penchant for sexual manipulation. She is the creator of the fictional demonomicons, which later served as inspiration for a real life sourcebook of the same name. For a period of time, she travelled with the Company of Seven under the alias Tasha. As with many Greyhawk characters, sources often contradict on exact details regarding Iggwilv.