Eldrazi Tron is effectively a mirror in many respects — both decks share Devourer of Destiny, Kozilek's Command, and Ugin's Labyrinth, and both are trying to deploy large threats ahead of curve. Their key advantages are Tron mana enabling Karn, All Is Dust, and Emrakul faster, plus Chalice of the Void locking out your cheap spells, and Karn tutoring hate pieces post-board. Your Emrakul the Promised End is the premier threat in this matchup since it takes control of their Karn or Tron pieces; play toward resolving it as quickly as possible. Pawpatch Formation is an instant that can either protect your creatures or push through the final points of damage in a board stall. Surgical Extraction removes their Karn or Chalice after you answer one copy. The changes are minimal because this is fundamentally a threat-density matchup and your core engine is exactly what you want.