This elegant engine turns Overgrown Battlement into an absolute powerhouse simply by leveraging its ability to tap for massive amounts of green mana when you control enough defenders. We channel that bounty directly into Staff of Domination, whose ability to untap the Battlement for three mana and then untap itself for one mana leaves you with a net surplus of mana with every iteration. Once this positive feedback loop is humming, you can easily redirect that infinite green mana into the Staff's other activations to draw your entire deck, gain infinite life, and tap or untap every creature on the battlefield at will.