The source of such cruel madness can often be traced to a singular source-proximity to strange, eldritch dimensions. The yetis' mountain lairs rise high in places where the boundaries between this world and others rasp thin. It is unclear if the yeti are invaders from these dimensions or Material Plane natives influenced by otherworldly realms, but it seems certain that whatever their origins, the yeti are no friends to those who dwell beyond, and may even act as guardians against intrusions from such strange worlds into the Material Plane.