Survival Elves is a mana-glut, Survival of the Fittest deck backed up by Armageddon, so Aura of Silence taxes their artifact/enchantment spells while giving a repeatable answer to Survival of the Fittest, Gaea's Cradle-fueled threats' support pieces, or an Armageddon-adjacent enchantment if needed. Sphere of Law blunts their red splash (Thornscape Battlemage's kicker damage, Anger, Squee, Nantuko Vigilante) by preventing 2 damage from red sources, which is relevant since our life total matters for Sylvan Library and Windswept Heath. We trim the extra Naturalize and cut Winter's Grasp copies since our own land destruction plan is less important against a deck full of mana dorks that dodge Wasteland and rebuild quickly via Yavimaya Granger and Windswept Heath. Keep Oath of Druids, Sphere of Resistance, and Terravore as the core plan, since Sphere of Resistance is brutal against their dork-heavy curve and Terravore grows well once lands start dying on both sides.