Eldrazi Tron's colorless artifact package is a strong target for Meltdown — Expedition Map, Mind Stone, and a low Chalice of the Void setting can all be answered at X=1 or X=2, though be mindful they may set Chalice at a number that also stops our own Meltdown. Nihil Spellbomb offers minor graveyard disruption but this matchup is mostly decided by racing before Karn, the Great Creator locks our own artifacts or Ugin, Eye of the Storms takes over the game — prioritize keeping pressure on with our low curve threats. Our removal suite (Lightning Bolt, Unholy Heat if kept in) still answers Thought-Knot Seer (4/4, needs delirium Unholy Heat) but not the bigger Eldrazi, so play around Devourer of Destiny's exile trigger rather than trying to remove it. Keep the deck lean and fast since Tron decks are clunky in the early turns.