Potentia, sometimes colloquially called mana, is a form of potential energy which can be used to fuel magic. Unlike other forms of potential energy, such as chemical, elastic, or gravitational, Potentia is sensitive to the will of conscious beings like dragons, sapes, and nature spirits.

Potentia may derive from one of three sources, leylines, information, or willpower.

Magic users can store magic, though the physical location which stores this magic does not appear to be located inside of the physical body, or within three-dimensional space at all. A hypothetical organ called the olum, which is integrated with the digestive system of each magic user, is believed to be the storage location for potentia.