This is for two vintage editions of Dragon magazine that contain an extensive and detailed guide for running any campaign that includes a School of Magic, or magical items and spells belonging to the NPCs; Vecna, Iggwilv and Acererak.

Contains many other articles, reviews etc. but I've found the above incredibly useful for my own, Greyhawk based campaign. The magical tomes of these NPCs are simply mint for players to find!