Blue Eldrazi Tron by urbananathema on MtGO

Creatures (17)
4 Conduit of Ruin
4 Matter Reshaper
4 Thought-Knot Seer
2 Ulamog, the Ceaseless Hunger
3 Walking Ballista

Non-Creature Spells (19)
2 All Is Dust
4 Condescend
2 Dismember
4 Remand
3 Repeal
4 Expedition Map

Lands (24)
4 Eldrazi Temple
1 Ghost Quarter
2 Halimar Depths
5 Island
4 Urza’s Mine
4 Urza’s Power Plant
4 Urza’s Tower

Sideboard (15)
1 Cavern of Souls
4 Chalice of the Void
1 Grafdigger’s Cage
4 Leyline of Sanctity
2 Ratchet Bomb
2 Relic of Progenitus
1 Surgical Extraction


Tron decks have been a consistent force in Modern over the past several years, with their consistent late-game power rarely being outdone. Different versions of the deck have been viable, with blue versions being more controlling, and green versions more big mana focused. With the printing of the Eldrazi from Oath of the Gatewatch, entirely new archetypes in Modern and Legacy have sprouted up, as the consistency and value they provide are rarely matched by other midrange decks. The deck we’re featuring today takes the powerful midrange threats of Eldrazi Tron and combines them with the late game power of Mono-Blue Tron.

Like all Eldrazi decks, the powerful 3-4 punch of Matter Reshaper and Thought-Knot Seer is the core of this deck. Matter Reshaper is a decent attacker and blocker that always replaces itself, sometime casting the spell that it got on death. Thought-Knot Seer, on the other hand, strips the opponent of their best spell while adding a beefy attacker and blocker to the board. The drawback of the opponent drawing a card is much less than it appears on its surface, as the opponent is usually casting a removal spell to kill Seer, making it still positive on cards.

Further up the curve, the combo of Conduit of Ruin and Ulamog, the Ceaseless Hunger provides a powerful late game. Conduit has seen little play since its printing, but it does a good job of searching up Ulamog for 6 mana, all while being a well-sized 5/5 and making Ulamog only cost 8. Ulamog, the Ceaseless Hunger is a game-ender almost every time it is cast, with it being good both in multiples and early in the game. Walking Ballista provides a powerful curve-filler that deals with the format’s smaller creatures and takes advantage of the excess mana that this deck produces.

While forgoing green hurts this deck’s consistency in terms of getting UrzaTron online, it does provide some powerful controlling cards. Remand helps keep the opponent at bay while the manabase of this deck is developing, and Condescend and Repeal take advantage of the large amounts of mana this deck produces, countering spells and returning permanents respectively, both gaining card advantage in the process.

Here are the changes I would make going forward:


-1 Conduit of Ruin

-1 Repeal

+1 Walking Ballista

+1 Basilisk Collar


No changes.

This is day 239 of’s 2017 Deck of the Day column, where each day we’ll feature a different Standard, Modern, or Legacy deck that caught our eye. You can read day 238 here, where we featured a Standard Mono-White deck that looks to go as wide as possible.

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