From publisher blurb:
This booklet provides the necessary instructions to help convert system-agnostic game statistics expressed in the Calidar books. It also gives an introductory overview of the Calidar Universe and its "known world," the Great Caldera.
In a fantasy setting designed without core rules from a specific role-playing game, there lies a challenge in describing creatures, spells, and game effects so everyone can understand and easily express them in their chosen system. Much of this is abstracted in Calidar books, leaving referees at liberty to interpret the author’s intent in ways that best suit their purposes. However, mechanics need to be suggested more explicitly at times. The following pages list terms and concepts describing game effects and abilities. In most cases, scores allocated to character or monster statistics are expressed in Calidar books as percentages of customary ranges used in the players’ chosen game systems.