This mirror-adjacent matchup comes down to Karn, the Great Creator access and top-end power, so a second The One Ring found by your own Karn, the Great Creator gives you another avenue to out-card-advantage theirs. Mycosynth Lattice is a powerful Karn, the Great Creator tutor target here since it turns all their lands into artifacts, so your Karn, the Great Creator stops activated abilities on any land they rely on, including Urza's Saga and Urza's Workshop. Their own Karn, the Great Creator would do the same to your permanents, so be careful about when you land it. Ensnaring Bridge can lock out their Construct tokens from Urza's Saga, provided you manage your own hand size. Cyclonic Rift and Sink into Stupor are cut since bounce is only temporary against a deck that will simply replay its ramp pieces or lock pieces like Trinisphere the following turn. Race to assemble Urza's Tower, Urza's Power Plant, and Urza's Mine early so your own Karn, the Great Creator and The One Ring come down ahead of theirs.