remember that those costs are modified by the plausibility of the change as well!<br/><br/>'Plausible' changes are x1. Basically things things that could be accomplished by the locals without any magic, and that aren't too hard to convince them to do<br/>'Improbably' changes are x2. These would be things that are 'theoretically' possible for the locals to do, but likely wouldn't be able to do without outside help, or things that they really would rather not do.<br/>'Impossible' changes are x4 (or more). These are things that directly violate the laws of nature or are completely socially unacceptable.<br/><br/>Page 129 has more detail :)