Amazon.com description: Product Description: Rules Expansion by Mike MearlsThis is a must-have book for DMs and players who want to get the most out of the high-octane variant action fantasy rulesof Monte Cook Presents: Iron Heroes. The book’s in-depth rules discussion teaches you not only how to use the rules of the game, but how to change them.These pages include new options and ideasfor existing rules, expansions of some concepts presented in Iron Heroes, and all-new material to supplement your Iron Heroes games. The useful design commentary helps you run a successful heroic combat character or campaign by showing you how everychange can alter the nature of the game and offering suggestions of how best to apply them. Now youcan see how the system really works!