Strategic Use of Crystals During Free Spins
You are unable to choose the Crystal, but you can play in a way that makes the most of its power. My own tactic revolves around the free spins. The base game is fine, but the real excitement is in the bonus round. I view every spin as movement toward activating that feature, where the Crystal operates. Once the free spins commence, my job is to observe and be patient, anticipating to notice that special symbol land and spread.