Pyroclasm sweeps their mana dorks (Birds of Paradise, Fyndhorn Elves, Llanowar Elves) and small creatures (Wirewood Symbiote, Multani's Acolyte, Quirion Ranger), crippling their Gaea's Cradle and Survival of the Fittest engines by removing the bodies that power them. Their own Armageddon copies mean the games can be long and grindy, so trading our fragile small creatures for a sweeper effect is a good exchange. Keep Wasteland and Rishadan Port pressure on their Gaea's Cradle and Brushland manabase, since denying mana denies their entire plan. Swords to Plowshares remains vital against Deranged Hermit and Ravenous Baloth.