Using its Delta Control Poké-Power, Metagross δ helps you evolve your Dratini δ and Dragonair δ into Dragonite δ, which replenish your board with Energy to unleash heavy-hitting Crush and Burn attacks. The Holon Engine is a perfect fit in the deck, allowing you to pitch Lightning Energy into the discard for Dragonite δ’s Delta Charge. A single Deoxys Metagross even gives you a way to recover Metal Energy as well.