Eldrazi Tron is loaded with artifacts and colorless permanents, making Force of Vigor a premium two-for-one against their mana artifacts like Talisman of Resilience, Expedition Map, or Giant's Boulder. Brotherhood's End can destroy their cheap artifacts with mana value 3 or less (Talisman of Resilience, Expedition Map, Giant's Boulder) while its damage mode is mostly irrelevant against their big Eldrazi bodies. Force of Negation only hits noncreature spells, but Karn and Ugin are both worth countering, so we only trim it slightly rather than fully; Curator of Mysteries comes out since it's too slow against a deck that can deploy Ulamog or Devourer of Destiny ahead of our clock. Focus on disrupting their mana engine before they can lock us out with Trinisphere or resolve a game-ending Eldrazi.