Chamber+Circle is a roleplaying game, where you take on the parts of Witches: highly armed, highly competent women with supernatural powers, enchanted weapons, magical vehicles, and a whole lot of ass to kick.
Substitute Reagents is a supplement to your Witches' awesomeness, with Powers, Implements, Combos, and more. With fourteen pages including the illustrated cover, and eighteen new mechanics and subsystems, Substitute Reagents will not only power up your Witches, but your story as well.
Substitute Reagents takes the sleek and streamlined framework at the heart of Chamber+Circle and expands it into new themes and subjects: tame demons and broker contracts with the fae, wage sprawling city-sized battles, engage long-term multi-session projects, or zoom in on the smaller and realer moments of your Witches' lives after the casings land and the brimstone clears.
Substitute Reagents deliberately lacks any one "core idea": it offers and explains eighteen assorted rules to use in isolation or in combination, and gives direction on how many of these ingredients will react, giving your group a deep toolbox to modify your game and build your own tools to do more.
You'll find a template to give your Witches unique skills other than asskicking, a system for applying stats to the rest of the world on demand, several approaches to experience and advancement, conflicts on massive scales, even a generator to quickly make interesting and story-hook-laden characters on the fly, both Witches and NPCs. The short games and one-shots Chamber+Circle was written for and more involved epics can both open the throttle with the flexibility and depth these new rules can add.