This elegant loop takes flight with Hellkite Charger, whose attack trigger demands a hefty mana payment to grant an extra combat phase. To sustain this, Nature's Will steps in as the engine: whenever your flying dragon connects for combat damage, it untaps all of your lands while locking down the opponent's mana sources. By tapping your lands to pay for Hellkite Charger's ability and then recouping that mana—and more—through Nature's Will's triggered ability during the ensuing combat, you create a self-sustaining cycle of endless attacks and completely untappable lands.