eyond the eyeball-infested White Plains is the homeland of the oni. These spirits appear almost elflike, except for their diminutive size, wings, horns, and razor-sharp fangs. While goodly in demeanor, the oni are fiercely territorial and brook no intrusion by outsiders. Long years of warring with the monstrous floating eyes of the White Plains have brought them to a stage where they assume any outsider will be an enemy, and react accordingly. Spirits of land, water, and air, the oni are formidable opponents, particularly their hunters. Even the common river oni are not to be trifled with.

A river runs through the Oni Realm, home to many of the greater spirits. Explorers are warned to take care in traversing it, as it is easy to lose possessions in the depths.