The Sphere governing the spirit world called the Umbra, spirits that visit Earth and spiritual energy. It allows mages to sense, call and communicate with spirits (also called Umbrood). It enables travel to the Umbra and manipulation of the Gauntlet. It allows mages to harm, heal, change and create ephemera, the stuff of the spirit world.
Called Dimensional Science by the Technocracy. This Sphere is important to the Dreamspeakers and Void Engineers.