This is a mirror-adjacent matchup built around the same Eldrazi Temple/Ugin's Labyrinth manabase plus Urza's Saga, so Force of Vigor is excellent — it blows up their Urza's Saga before it assembles a Construct army, or their Vexing Bauble and other key artifacts. Trinisphere punishes their Ancient Stirrings-into-cheap-permanent shell and their two-mana enablers while your ramp lets you play through the tax more easily. Dismember is the answer to Basking Broodscale and Glaring Fleshraker before they grow, both of which die at base size (2/2). Trim the slowest top-end and Fanatic of Rhonas, since this is a race where proactive disruption matters more than raw mana.