Zagig Yragerne, the "Mad Archmage," rules Greyhawk. It was Zagig who poured funds into the City of Greyhawk in order to make it into the "Gem of the Flanaess."
Castle Greyhawk mysteriously abandoned. When the timeless Zagig vanished after years of rule over the City of Greyhawk, the castle was likewise abandoned, and rumors tell of a terrible curse placed upon the fortress.
Iuz is imprisoned beneath Greyhawk Castle. Iuz had been trapped by the mirthful and mad Zagig, locked away in a strange chamber deep below the ruins of Greyhawk Castle, one of nine powerful demi-gods so confined.
Lord Robilar frees Iuz and eight other demi-gods released from prison in Greyhawk Castle. Iuz has vowed to bring ruin upon Tensor the Archmage and Lord Robilar and the others who tried to slay him when his prison was sprung.