A slightly unfavorable matchup pre-board, but it gets worse post-board; in general, our deck is extremely resilient and can flood the board extremely quickly but does pack minimal disruption/interaction, which in turn means that we excel against aggro/other creature-based strategies but suffer against unfair decks, like this one. Thankfully, the advent of disruptive "fair" decks like Grixis Death's Shadow has largely managed to keep these decks in check, and the only three currently above the lower levels of Tier 2 are Eldrazi Tron, regular Gx Tron, and Storm.
Eldrazi Tron is definitely less unfair than regular Tron or Storm, both of which specialize in the classic "Turn 3 Karn/Past in Flames, opponent scoops" gameplan. It is trying to do unfair things, but those unfair things, like a Turn 3 Reality Smasher or a Turn-1 Chalice of the Void on 1, are not necessarily game over for our deck.
The basic Eldrazi Tron plan is to disrupt us with stuff like Thought-Knot Seer and Chalice of the Void and then run us over with Reality Smashers and Endbringers, cast ahead of schedule thanks to Tron lands and Eldrazi Temple, before we can recover. It is still fundamentally a creature-based, Eldrazi Goodstuff strategy, which does allow our chump block plan to keep us alive for some time. However, what makes matters worse for us in this matchup is their disruption, which often just slows us down enough that they can go right over the top of our low curve, or alternatively just slam right into us with Reality Smasher (which does have trample). Overall, their absurd value from Turn 2 Thought-Knot Seers doesn't kill us outright, but it will overwhelm us eventually and therefore definitely puts us in the beatdown position and on the back foot.
Here, in Game 1, Walking Ballista, Reality Smasher (which tops pretty much everything we have), and Chalice of the Void on X = 2 are the most problematic threats we face. Our best chance is to outrace them with Company and possibly Rally on turns 4 and 5 to accumulate enough drain, combined with swinging in with random Spirit and Elemental tokens, before getting run over by their creatures or locked out of game by Chalice. Land screwing them with Fulminator Mage is helpful and can often buy us a couple turns, but winning the game does require a slow hand or the wrong threats from our opponent.
Post-Board: Eldrazi Tron gets a wealth of sideboard cards, including Pithing Needle, which stops Cartel Aristocrat from doing much of anything, and good ol' Grafdigger's Cage. Both significantly delay our drain kill. Meanwhile, Surgical Extraction and Ratchet Bomb are less concerning, as having to tick up Bomb twice means we're much less likely to play into it and Eldrazi Tron doesn't run nearly enough removal to make Surgical viable without us sacing our creatures prematurely. Still, the matchup becomes even worse post-board as they maintain their versatile Eldrazi beatdown shell while increasing their disruption which slows us down even further.
+2 Fulminator Mage, +1 Thoughtseize, +1 Inquisition of Kozilek, +2 Reclamation Sage, +1 Stony Silence: Land destruction and disruption to hold down the fort. One of the bad things about the Eldrazi Tron matchup is that it is so much less artifact-dependent than Classic Tron, with them not running Chromatic Star and Chromatic Sphere for colored mana and all. This makes Reclamation Sage a bit worse, but it still hits at least 12 utility artifacts like Expedition Map, Mind Stone, and most importantly, Walking Ballista.
-2 Cartel Aristocrat: Bad against colorless.
-1 Liliana, Heretical Healer
, -1 Dark Confidant, -1 Doomed Traveler, -2 Fatal Push: Our best chance is to run like the wind before they can get their Endbringers down; this means that cards geared towards resilience and long-term advantage, like the ones above, are much less effective as part of our gameplan. Push also can't kill anything profitably besides Walking Ballista and Thought-Knot Seer, so it goes out, too.
Side Note: The sideboarding plan is pretty much the same for regular Gx Tron. We do get to bring in a Surgical Extraction over an Inquisition of Kozilek, while Gx Tron also has less sideboard cards (usually just a single Pithing Needle or Engineered Explosives and a single Anger of the Gods or Kozilek's Return). However, Gx Tron is overall even much worse of a nightmare both post-board and pre-board compared to Eldrazi Tron simply because our sideboard disruption is limited and their threats are much more powerful (Karn Liberated and Ugin, the Spirit Dragon, as opposed to Reality Smasher and Thought-Knot Seer).
