MAGIC
Magic is a strange force that alters the world using a set of spiritual and mental principles that are unique from but have overlap with physics. It's considered it's own set of rules, separate from science, including advanced science.

Creatures: Magic creatures have been imbued with magic and radiate magic. Even mundane creatures radiate magic this way while temporarily under the effects of a magical spell.

Items: Magic items, are created through magic and their effects are considered magic. Complex magic items are magical devices that can be manipulated using the Use Magic Device skill.

Powers: Magic powers, often called "spells", are created through magic. Complex magical rituals use the Spellcraft skill plus one other based on the spell's effects.

Feats: Magic Feats are magical in nature despite being feats. They often affect powers or magic items.