This clever loop transforms Deadeye Navigator into a self-sustaining engine by taking advantage of the mana acceleration provided by Leyline of Abundance and Song of Freyalise. With Song of Freyalise granting your creatures the ability to tap for mana, paying for Deadeye Navigator's blink ability is completely subsidized by the extra green mana generated from Leyline of Abundance whenever a creature is tapped. As you endlessly cycle the Navigator in and out of exile, the battlefield is flooded with infinite enters-the-battlefield and leaves-the-battlefield triggers to fuel any additional payoffs you might have, while Frostcliff Siege safely sits back providing passive buffs and utility to round out your strategy.