Making Magic, Part 1: Defining and Selecting Magic Systems In the first of a two-part series, WD editor Moriah Richard explains how magic systems exist on a spectrum and gives you some tips on selecting a system that works for you. Author: Analog Science Fiction and Fact, is famously quoted as having said this: “The major distinction between fantasy and science fiction is, simply, that science fiction uses one, or a very, very few new postulates, and develops the rigidly consistent logical consequences of these limited postulates. Fantasy makes its rules as it goes along … The basic nature of fantasy is “The only rule is, make up a new rule any time you need one!’”