This opponent is entirely dependent on their colorless manabase (Eldrazi Temple, Ugin's Labyrinth, Urza's Saga) and a critical mass of cheap artifacts/colorless permanents; Break the Ice overloaded destroys every land that can produce colorless mana, crippling Eldrazi Temple, Ugin's Labyrinth, and Urza's Saga in one sweep. Meltdown for X=1 or 2 wipes out their cheap artifact suite (Vexing Bauble, Haywire Mite, Soul-Guide Lantern, Urza's Saga tokens) that enables the Basking Broodscale-adjacent value plan. Lightning Bolt is too small against their 6/6+ Eldrazi threats and Cling to Dust/Dress Down don't address the actual game plan, so they come out for the more impactful land and artifact destruction. Surgical Extraction can strip a troublesome Ancient Stirrings hit or key artifact once revealed.