The Supernatural is a tightly integrated presentation of game setting and rules governing magic. The game presents two types of magic: Secular and Religious. Secular magic falls into several categories based on effects; Religious magic derives from one of numerous deities that vary by region. Much of the information presented details the various deities, religions, and rituals of the major locales in the setting. Even Secular magic spells vary by region.
Spellcasting is a complex action that allows casters to create numerous magical effects as "Spells". The rules include Magic Resistance, Saving Throws, Magic Energy Points, Magic Energy Accrual and Storage, rules for learning spells, and so forth.