By harnessing the massive green mana generation of Karametra's Acolyte based on your devotion, you unlock an engine capable of infinitely recasting it. Temur Sabertooth serves as the crucial bounce outlet, using a portion of that floating mana to return the Acolyte to your hand so it can be cast again, generating an endless loop of enters-the-battlefield and leaves-the-battlefield triggers alongside a growing storm count. While The Fire Crystal isn't strictly necessary for the core mana loop, its presence grants your creatures haste and offers a convenient way to copy your threats if you have mana to spare, rounding out an explosive sequence.