Tron's engine runs through Expedition Map, Giant's Boulder, and Bonder's Ornament, giving Ancient Grudge good targets for mana/ramp disruption and two-for-one value off its flashback; it won't touch their Urza lands since those aren't artifacts. This is otherwise a race against big top-end threats like Maelstrom Colossus and Bramble Wurm, so keep your full removal and lifegain suite (Lightning Bolt, Thraben Charm, Sacred Cat, Prismatic Strands) to survive their occasional Pinnacle Kill-Ship or Breath Weapon sweep. Only a light, low-cost swap is needed since the Tron matchup is primarily about applying pressure before they assemble their mana engine rather than reconfiguring your removal suite.