The primary way in which Storm Knights were able to shape reality was the ability to impose the rules of their own reality on a limited area of another reality. Each reality, or "cosm," had a set of four "axioms," which delineated what could be achieved under its rules. The most important of these for gameplay were the technological, magical, and spiritual axioms. For ordinary people, violating the laws of a reality is hard, and becomes increasingly impossible over time. For example, when the Neolithic reality of The Living Land invaded North America, soldiers found that their guns and radios no longer worked because the tech-axiom of the cosm only allowed for a Neolithic level of technology. Storm Knights, however, carried their own reality with them. Normally, they could perform under their own reality wherever they went, sometimes requiring a check against their reality skill, the one skill possessed by all Storm Knights, to accomplish feats which particularly violated the rules of a reality.