This matchup is a race against their lock pieces — Trinisphere taxes your cheap spells to three mana and cripples Crop Rotation and Mox Diamond, while Karn, the Great Creator can search up Mycosynth Lattice to prevent you from tapping lands or Ensnaring Bridge to strand Marit Lage permanently. Force of Vigor is your premier answer, destroying Trinisphere, Ensnaring Bridge, or Mycosynth Lattice at instant speed for free even through soft permission. Collector Ouphe neuters their entire mana acceleration suite — Grim Monolith, Candelabra of Tawnos, Manifold Key, and Voltaic Key all go offline, drastically slowing the speed at which they can deploy Karn or Ugin, Eye of the Storms. Disruptor Flute lets you proactively tax whichever lock piece threatens most — naming Trinisphere on the draw buys crucial tempo, and Gaddock Teeg already in your main deck shuts off Karn, The One Ring, and Ugin simultaneously if it resolves. Prioritize assembling Dark Depths plus Thespian's Stage as fast as possible; Elvish Reclaimer and Crop Rotation should be finding combo pieces immediately, and Boseiju, Who Endures provides a repeatable channel outlet to destroy artifact threats without being taxed by Trinisphere.