Editing Geos:Fate-Fudge Rules:Magic:Imperial Magic (section)

===Base Difficulty===
	The simplest effects – creating a light breeze, bringing rain down from a cloudy sky, making a person friendly towards you – are the easiest.  These affect the world in a limited and natural way – they're effects that could happen, even  if somewhat unlikely.  These have a base difficulty of 0, and may be made permanent without using static thauma if doing so would be natural.  So a breeze or rain couldn't be made permanent (at a base difficulty of 0, at least), but a spring could be called from a ditch in the desert or a person's attitude permanently shifted.

	Simple natural effects in natural circumstances that wouldn't normally happen spontaneously, like causing a bridge to collapse, or setting wood on fire, are more difficult.  Calling a thunderstorm in a desert would also qualify because, although it could happen, it's so plainly unnatural that something unusual must have called it.  These have a base difficulty of 1. 

	Natural effects in alien circumstances are more difficult still.  Coming through a burning building unscathed is an example: while it's natural not to be burnt, it's not natural in this specific circumstance.  Growing a lion's claws would count, too.  The base difficulty for these effects is 2.

	Unnatural effects have a base difficulty of 3, regardless of circumstances.  Creating a house ex nihilo or growing wings sufficient to fly would be an example – although wings are natural, big wings aren't.  

	Effects that are completely alien to reality have a base difficulty of 4 or more.  Creating cold fire that freezes what it consumes, being in two places at once, or are completely alien things.  Not only are they unnatural, they're also plainly impossible by the commonly understood laws of nature.<!--  @todo:  permanency rules-->