Ruby Storm wants to chain cheap rituals (Desperate Ritual, Pyretic Ritual, Manamorphose) and card advantage spells into a lethal Grapeshot or Past in Flames turn. Trinisphere taxes every one- and two-mana ritual and cantrip up to three mana, which is devastating against a deck whose whole plan depends on efficient mana generation. Nature's Claim is mostly a dead card here since they run almost no relevant artifacts or enchantments, but we include it as minor flex since the two Trinisphere are the real payoff; consider holding Nature's Claim back and prioritizing Trinisphere copies if forced to choose. We cut Sowing Mycospawn and Emrakul since they're too slow against a deck that can kill out of nowhere before our top-end matters.