Iuz the Old is the Demigod of Cruelty. Unlike the other gods, Iuz dwells on Oerth itself, in a kingdom bearing his name. Many believe him to be a demon. He was the instigator behind the recent Greyhawk Wars, in which he conquered several other lands and gained almost half of the known world. His armies of humans, orcs, undead and even demons were barely stopped by an alliance of most of the good and neutral nations combined. Though Greyhawk remained supposedly neutral, the wars came to be known as the Greyhawk Wars because that city is where the peace treaties that ended them were signed. Only a few years ago however, a powerful artifact, the Crook of Rao was retrieved by adventurers and delivered to the Archcleric of Rao, one of the most powerful clerics on Oerth, who used it in a tremendous ceremony to banish nearly all the demons from the Flanaess. The good nations of Nyrond and Furyondy used the chance to strike back at Iuz’s weakened and disorganized forces and retake some of the lands lost to him.
Iuz has a special hatred towards the Free City of Greyhawk, as well as all the gods.