Hallow

The Icyenic Realm is the otherwise unnamed homeworld of the Icyene, a race of winged humanoids aligned to Saradomin. The planet consists mostly of water, with islands where the Icyene live as priests, farmers and warriors. It is mentioned only by General Padomenes and in the Book of Saradomin. It seems that many Icyene have left the plane for Gielinor, due to their large numbers in the God Wars and their dominance of the Hallowland under Queen Efaritay until it fell to the vampyre Lord Lowerniel Vergidiyad Drakan. Given by Padomenes' description of the length of the days, it appears that the planet revolves extremely slowly around its axis, for the days are as long as years on Gielinor, although this may have been a metaphor. When the day ends and the light fades, the Icyene travel to another island, where they are "granted light by Saradomin" and live on.

After the end of the Gielinorian God Wars, Saradomin was banished from Gielinor by Guthix along with most other gods and returned to the Icyenic Realm so as to improve his relationship with the Icyene. He returned to Gielinor centuries later just after the assassination of Guthix, where he took his commander, Zilyana, with him to the realm to make plans.