Dark Symmetry points - and their subsequent system variants for Conan and Infinity - are a unique feature of the 2d20 system that can really help a GM to engage with both the players and the scene. The Dark Symmetry Deck is packed with interesting spends that will add unique elements to any encounter while keeping the action free-flowing and fun. Each card provides three unique one-point Dark Symmetry spends that can be used to hinder combat scenes, the surrounding environment and skill tests. The fourth spend on each card - the special event - may vary in cost and effect, but can be used to really give the players something to think about. Simply draw a card at random, choose a suitable spend, then unleash the power of the Dark Symmetry! - from the publisher's blurb