Iuz is the chaotic evil demigod of Deceit, Evil, Oppression, Pain, and Wickedness. Iuz is variously called “The Old One” and “Old Wicked,” among other titles. Unlike most Greyhawk deities, Iuz makes his home on Oerth, where he rules a broad swath of the Flanaess known as the Empire of Iuz. His symbol is a grinning human skull, or a human skull with blood-red highlights.
Iuz is the cambion child of the demon prince Graz’zt and Iggwilv, the so-called “Witch Queen of Perrenland.” He is an ally, and sometimes lover of, Zuggtmoy, Demon Queen of Fungi, who keeps his soul amulet safe in her layer of the Abyss. His half-sister Drelnza, a vampire daughter of Iggwilv, was slain by adventurers.
Iuz was originally a strikingly handsome cambion. In the epic battle that resulted from Graz’zt striking out against Iggwilv in a bid for freedom, Iuz’s handsome form was split into two “halves.” He can either appear in the form of a gnarled, old human male, or as a bloated, red-skinned demonic figure. In his demonic form, he is seven feet tall, with reddish skin, pointed ears, and long, steely fingers. In his human form, he is barely five feet in height, and can attack with a disgusting spittle that withers all that it touches.
Iuz has many enemies, notably Vecna, Saint Cuthbert, Zagyg, and the Horned Society. He hates Keoghtom, Kelanen, Heward, and Murlynd for aiding in his imprisonment, and hates Bigby, Neb Retnar, Quij, Robilar, Riggby, Tenser for trying to kill him.