Zagyg (The Mad) [Demigod]:

Zagyg is the Mad Arch-mage, servitor of Boccob, the demipower of humor, eccentricity, and occult studies. He is mad inasmuch as none but his master seem to be able to fathom his reasoning and sense of humor. Zagyg has no priests and very few worshippers.

Zagyg is rarely portrayed, since he can appear in any guise he wishes, but the few portraits that exist show a balding, white-haired, portly fellow with a wide smile and eyes inscrutably closed. This depiction bears a striking similarity to Zagig Yragerne, the lunatic of the Free City of Greyhawk, who initiated the construction of its infamous Castle. Sages usually consider the two to be one and the same. Whether the demipower took mortal form, or the mortal became a demigod, is unknown.

Zagyg receives small offerings and homages from time to time, from sages and scholars studying difficult and arcane areas of lore. Whether Zagyg takes any notice of this is unknown.