
The Old One builds great temples to himself within his empires, but elsewhere his places of worship are small and secret things. They are six in number: Obmi, Keak, Gleed, Sunifarel Brightrobe, Griswald Hairhand, and Lord Dorag. The Boneshadow are spies and secret agents. He once had a High Priest, Patch, who was destroyed by the armies of Furyondy during the Greyhawk Wars. Among them are the high priestesses Althea and Halga, who at the top of Iuz's priestly hierarchy. Each tier is populated by six evil spellcasters who use their magic to serve the will of the Old One. The Boneheart is divided into two tiers, the Greater Boneheart and the Lesser Boneheart.

Most learn to use greatswords, though whips and flails are greatly approved of for their ability to inflict pain. They adopt inconspicuous garb outside the Empire of Iuz, but among the faithful they dress in rusty black or white streaked with rust-red stains of blood. They travel the Flanaess in disguise, seeking powerful magic and captured creatures of great good (or simply their skulls) as trophies to prove their worthiness. Iuz's clergy believe in the survival of the fittest, and so battle one another as often as they battle the enemies of their lord. Often they are multi-classed wizards or fighters. These titles are accepted as the honor it is intended to be the twisted culture that Iuz cultivates considers these words to be flattering. Even if a community espouses tolerance toward the Iuzian creed, his followers prefer to remain a secret, as befits the worshipers of the god of deceit.Ĭlerics of Iuz are commonly known as Liars or Oppressors among the faithful. Outside the Empire of Iuz, his worship is uncommon and usually suppressed by the local government. The worshippers of Iuz seek to further the expansion of their master's empire. Worshipers Ī priest of Iuz, as depicted in the Living Greyhawk Gazetteer (2000).

No atrocity committed in the name of Iuz is so sickening, no trick so cruel, that it does not meet with the Old One's approval. The infliction of pain and suffering is a delight comparable with none other.

Iuz, who is the strongest and most deceitful of all, is the rightful and destined ruler of all of Oerth. Deceit and guile are the proper tools of the enlightened ruler. The strong should exploit the weak, for such is their right. Iuz rules from "blood-black Dorakaa," the City of Skulls. He hates Keoghtom, Kelanen, Heward, and Murlynd for aiding in his imprisonment, and hates Bigby, Neb Retnar, Quij, Robilar, Riggby, and Tenser for trying to kill him. Iuz has many enemies, notably Vecna, Saint Cuthbert, Zagyg, and the Horned Society. Thus far, they seek to dominate very different territories. He deals carefully with Lolth, but has no formal alliance with her. Iuz is allied with Graz'zt and Pazuzu, who he must deal with to summon demonic minions in any great numbers.

He is also related, through his father, to the demon lords Pale Night, Lupercio, Rhyxali, Vucarik of Chains, and Zivorgian. Iuz is the maternal grandson (by adoption) of Baba Yaga, and through Graz'zt, the half-brother of Athux, Thraxxia, and Arzial. His half-sister Drelnza, a vampire daughter of Iggwilv, was slain by adventurers. 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. In his human form, he is barely five feet in height, and can attack with a disgusting spittle that withers all that it touches. In his demonic form, he is seven feet tall, with reddish skin, pointed ears, and long, steely fingers. 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. Iuz was originally a strikingly handsome cambion.
