A recently ascended half-fiend, Iuz normally appears as a shriveled old man. He spreads cults and cabals wherever he goes and is particularly fond of impersonating other deities in order to trick their followers into doing evil.
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 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 is the maternal grandson (by adoption) of Baba Yaga, and through Graz’zt, the half-brother of Athux, Thraxxia, and Arzial. He is also related, through his father, to the demon lords Pale Night, Lupercio, Rhyxali, Vucarik of Chains, and Zivorgian.
Iuz is allied with Graz’zt and Pazuzu, who he must deal with to summon demonic minions in any great numbers. He deals carefully with Lolth, but has no formal alliance with her. Thus far, they seek to dominate very different territories.
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.
Iuz rules from “blood-black Dorakaa,” the City of Skulls.
The strong should exploit the weak, for such is their right. Deceit and guile are the proper tools of the enlightened ruler. Iuz, who is the strongest and most deceitful of all, is the rightful and destined ruler of all of Oerth. The infliction of pain and suffering is a delight comparable with none other. 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 worshippers of Iuz seek to further the expansion of their master’s empire. Outside the Empire of Iuz, his worship is uncommon and usually suppressed by the local government. 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.
Clerics of Iuz are commonly known as Liars or Oppressors among the faithful. These titles are accepted as the honor it is intended to be; the twisted culture that Iuz cultivates considers these words to be flattering. Often they are multi-classed wizards or fighters.
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. 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. 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. Some adorn their robes with bones. Most learn to use greatswords, though whips and flails are greatly approved of for their ability to inflict pain.
The Boneheart is divided into two tiers, the Greater Boneheart and the Lesser Boneheart. Each tier is populated by six evil spellcasters who use their magic to serve the will of the Old One. Among them are the high priestesses Althea and Halga, who at the top of Iuz’s priestly hierarchy.
The Boneshadow are spies and secret agents. They are six in number: Obmi, Keak, Gleed, Sunifarel Brightrobe, Griswald Hairhand, and Lord Dorag.
The Old One builds great temples to himself within his empires, but elsewhere his places of worship are small and secret things. Iuz’s temples and shrines must be old, filthy, and dark. His altars are built of bones and include many skulls.
In forbidding wilderness terrain, far from the eyes of the forces of Good, Iuz maintains sites for mass rituals, sacrifices, and other foul deeds.
The ceremonies of Iuz include the burning of dung and other noxious substances, the beating of drums, and the clang of bronze bells. Blood sacrifice is practiced as often as practical, in as painful and horrific manner as the priests’ creativity allows.