Demonomicon of Iggwilv (column)

Demonomicon of Iggwilv was a series of articles in the magazines Dragon, Dungeon, and Dragon+. They examined various powerful demons, along with their associated cults.

Trivia
The Demonomicon sourcebook includes a few excerpts from the Demonomicon of Iggwilv, including new bits of info created for this sourcebook.