From Introduction:
Nobilis honing their miraculous abilities generally follow widely-known paths, striving to improve their Aspect, Domain, Realm, Spirit, or collection of Gifts. However, the road to greater power has a few narrow and twisting offshoots, routes that lead some Nobles to develop peculiar and unique abilities. Many of these take the form of byway or exclusive Attributes —miraculous Attributes possessed by only a small percentage of the Noble population. Each is the fruit of an idiosyncratic personal journey down a path of study few Nobilis walk. Most are weaker or less flexible than the four primary Attributes; the others have comparable power but specific limitations. The virtue of the exclusive Attributes lies not in their raw miraculous potency but rather in their rarity — the Powers who master them thereby command a rare resource, and can take advantage of this in their dealings with other Nobilis.