Gruul Land Destruction

"Gruul Land Destruction pairs a denial plan with a self-fueling threat: Mox Diamond ramps into early Stone Rain, Winter's Grasp, Thermokarst, and Pillage that systematically strip the opponent's lands, while Sphere of Resistance taxes every spell they manage to cast from a shrinking mana base. The destroyed lands pile into graveyards, growing Terravore, whose power and toughness equal the number of land cards in all graveyards, into an enormous attacker. Oath of Druids can cheat Terravore straight into play, and Sylvan Library supplies the card selection to keep the destruction chain flowing."