In a format like Modern, choosing an established strategy is a safe way to preserve the value of your cards. Jund, Death's Shadow and Tron are permanent features of the format. When a new strategy is born from one of these archetypes, buying into it will ensure you get the most mileage from your purchase, saving you money in the long run. While Tron is a known archetype, there are various ways to build Tron to suit your playstyle. Eldrazi Tron has seen consistent success in recent months by offering a disruptive package coupled with significant threats.

Counting to Seven

It's easy to assume Eldrazi Tron needs to assemble Tron as quickly as possible, but this is far from the case. While the strategy intends to play threats ahead of the curve, the deck can also use Eldrazi Temple to ramp into haymakers such as Thought-Knot Seer and Reality Smasher. It's an incredibly resilient strategy that utilizes the Tron lands as support, and attacking the mana may not always offer the best solution against it. Typically, attacking the manabase against conventional Tron strategies requires resources and slows the strategy down—effects such as Ghost Quarter or Field of Ruin trade you a Tron piece for a basic land. There will be instances where you will cast your threats fairly, and while this is not the core objective of the strategy, it can be enough in particular situations to see you through to victory. Eldrazi Tron works similarly to other Tron strategies, in that your threat density remains high, which creates favorable topdecks in the late game. 

One issue with Eldrazi Tron is the core use of Chalice of the Void, which is widely known to be an expensive card. It's powerful and disruptive, and sees extensive play in older formats such as Legacy. Eldrazi Tron's success is typically reflective of how well positioned Chalice of the Void is—given that Modern features powerful, cheap spells, that's pretty often. As a result, Chalice has retained its hefty price tag. Admittedly, it's a steep paywall, but Eldrazi Tron can function without Chalice if you use a bit of creativity.

Budget Eldrazi Tron

Like previous budget Modern lists, the build has to be modified given there is no like-for-like replacement on the expensive cards such as Chalice of the Void. With this, the budget build of Eldrazi Tron offers a flexible Colorless Eldrazi Stompy approach, featuring Eldrazi Mimic as a placeholder. 

Magic: The Gathering TCG Deck - Eldrazi Tron Budget by Emmmzyne

'Eldrazi Tron Budget' - constructed deck list and prices for the Magic: The Gathering Trading Card Game from TCGplayer Infinite!

Created By: Emmmzyne

Event:

Rank:

Modern

Market Price: $145.11

Cards

Urza's Mine

Market Price: $0.78

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/218281_200w.jpg

{T}: Add {C}. If you control an Urza's Power-Plant and an Urza's Tower, add {C}{C} instead.

Buy This Card! https://shop.tcgplayer.com/magic/double-masters/urzas-mine

Eldrazi Temple

Market Price: $6.66

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/222388_200w.jpg

{T}: Add {C}.
{T}: Add {C}{C}. Spend this mana only to cast colorless Eldrazi spells or activate abilities of colorless Eldrazi.

Buy This Card! https://shop.tcgplayer.com/magic/the-list/eldrazi-temple

Spatial Contortion

Market Price: $0.26

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/110699_200w.jpg

({C} represents colorless mana.)
Target creature gets +3/-3 until end of turn.

Buy This Card! https://shop.tcgplayer.com/magic/oath-of-the-gatewatch/spatial-contortion

Wastes

Market Price: $2.96

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/110703_200w.jpg

{T}: Add {C}.

Buy This Card! https://shop.tcgplayer.com/magic/oath-of-the-gatewatch/wastes

Mystic Forge

Market Price: $3.11

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/192786_200w.jpg

You may look at the top card of your library any time.
You may cast artifact spells and colorless spells from the top of your library.
{T}, Pay 1 life: Exile the top card of your library.

Buy This Card! https://shop.tcgplayer.com/magic/core-set-2020/mystic-forge

Witchbane Orb

Market Price: $0.63

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/56344_200w.jpg

When Witchbane Orb enters the battlefield, destroy all Curses attached to you.
You have hexproof. (You can't be the target of spells or abilities your opponents control, including Aura spells.)

Buy This Card! https://shop.tcgplayer.com/magic/innistrad/witchbane-orb

Blast Zone

Market Price: $2.50

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/188636_200w.jpg

Blast Zone enters the battlefield with a charge counter on it.
{T}: Add {C}.
{X}{X}, {T}: Put X charge counters on Blast Zone.
{3}, {T}, Sacrifice Blast Zone: Destroy each nonland permanent with converted mana cost equal to the number of charge counters on Blast Zone.

Buy This Card! https://shop.tcgplayer.com/magic/war-of-the-spark/blast-zone

Torpor Orb

Market Price: $5.02

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/39593_200w.jpg

Creatures entering the battlefield don't cause abilities to trigger.

Buy This Card! https://shop.tcgplayer.com/magic/new-phyrexia/torpor-orb

Radiant Fountain

Market Price: $0.08

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/215512_200w.jpg

When Radiant Fountain enters the battlefield, you gain 2 life.
{T}: Add {C}.

Buy This Card! https://shop.tcgplayer.com/magic/core-set-2021/radiant-fountain

Tormod's Crypt

Market Price: $0.19

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/215346_200w.jpg

{T}, Sacrifice Tormod's Crypt: Exile all cards from target player's graveyard.

Buy This Card! https://shop.tcgplayer.com/magic/core-set-2021/tormods-crypt

Ghost Quarter

Market Price: $1.00

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/166821_200w.jpg

{T}: Add {C}.
{T}, Sacrifice Ghost Quarter: Destroy target land. Its controller may search their library for a basic land card, put it onto the battlefield, then shuffle their library.

Buy This Card! https://shop.tcgplayer.com/magic/commander-anthology-volume-ii/ghost-quarter

Eldrazi Mimic

Market Price: $0.78

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/110798_200w.jpg

Whenever another colorless creature enters the battlefield under your control, you may change Eldrazi Mimic's base power and toughness to that creature's power and toughness until end of turn.

Buy This Card! https://shop.tcgplayer.com/magic/oath-of-the-gatewatch/eldrazi-mimic

Expedition Map

Market Price: $0.88

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/218259_200w.jpg

{2}, {T}, Sacrifice Expedition Map: Search your library for a land card, reveal it, and put it into your hand. Then shuffle your library.

Buy This Card! https://shop.tcgplayer.com/magic/double-masters/expedition-map

Skysovereign, Consul Flagship

Market Price: $0.79

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/122670_200w.jpg

Flying
Whenever Skysovereign, Consul Flagship enters the battlefield or attacks, it deals 3 damage to target creature or planeswalker an opponent controls.
Crew 3 (Tap any number of creatures you control with total power 3 or more: This Vehicle becomes an artifact creature until end of turn.)

Buy This Card! https://shop.tcgplayer.com/magic/kaladesh/skysovereign-consul-flagship

Urza's Tower

Market Price: $0.78

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/218285_200w.jpg

{T}: Add {C}. If you control an Urza's Mine and an Urza's Power-Plant, add {C}{C}{C} instead.

Buy This Card! https://shop.tcgplayer.com/magic/double-masters/urzas-tower

All Is Dust

Market Price: $5.92

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/180778_200w.jpg

Each player sacrifices all colored permanents they control.

Buy This Card! https://shop.tcgplayer.com/magic/ultimate-masters/all-is-dust

Mind Stone

Market Price: $1.06

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/222590_200w.jpg

{T}: Add {C}.
{1}, {T}, Sacrifice Mind Stone: Draw a card.

Buy This Card! https://shop.tcgplayer.com/magic/commander-zendikar-rising/mind-stone

Ratchet Bomb

Market Price: $0.26

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/218870_200w.jpg

{T}: Put a charge counter on Ratchet Bomb.
{T}, Sacrifice Ratchet Bomb: Destroy each nonland permanent with converted mana cost equal to the number of charge counters on Ratchet Bomb.

Buy This Card! https://shop.tcgplayer.com/magic/double-masters/ratchet-bomb

Thought-Knot Seer

Market Price: $7.43

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/222555_200w.jpg

({C} represents colorless mana.)
When Thought-Knot Seer enters the battlefield, target opponent reveals their hand. You choose a nonland card from it and exile that card.
When Thought-Knot Seer leaves the battlefield, target opponent draws a card.

Buy This Card! https://shop.tcgplayer.com/magic/the-list/thought-knot-seer

Scavenger Grounds

Market Price: $0.92

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/212458_200w.jpg

{T}: Add {C}.
{2}, {T}, Sacrifice a Desert: Exile all cards from all graveyards.

Buy This Card! https://shop.tcgplayer.com/magic/commander-2020/scavenger-grounds

Reality Smasher

Market Price: $2.84

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/110873_200w.jpg

({C} represents colorless mana.)
Trample, haste
Whenever Reality Smasher becomes the target of a spell an opponent controls, counter that spell unless its controller discards a card.

Buy This Card! https://shop.tcgplayer.com/magic/oath-of-the-gatewatch/reality-smasher

Sorcerous Spyglass

Market Price: $0.20

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/198975_200w.jpg

As Sorcerous Spyglass enters the battlefield, look at an opponent's hand, then choose any card name.
Activated abilities of sources with the chosen name can't be activated unless they're mana abilities.

Buy This Card! https://shop.tcgplayer.com/magic/throne-of-eldraine/sorcerous-spyglass

Ugin, the Ineffable

Market Price: $3.31

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/188862_200w.jpg

Colorless spells you cast cost {2} less to cast.
+1: Exile the top card of your library face down and look at it. Create a 2/2 colorless Spirit creature token. When that token leaves the battlefield, put the exiled card into your hand.
−3: Destroy target permanent that's one or more colors.

Buy This Card! https://shop.tcgplayer.com/magic/war-of-the-spark/ugin-the-ineffable

Dismember

Color Identity:B

Market Price: $2.14

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/98390_200w.jpg

({B/P} can be paid with either {B} or 2 life.)
Target creature gets -5/-5 until end of turn.

Buy This Card! https://shop.tcgplayer.com/magic/modern-masters-2015/dismember

Endbringer

Market Price: $0.49

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/110690_200w.jpg

Untap Endbringer during each other player's untap step.
{T}: Endbringer deals 1 damage to any target.
{C}, {T}: Target creature can't attack or block this turn.
{C}{C}, {T}: Draw a card.

Buy This Card! https://shop.tcgplayer.com/magic/oath-of-the-gatewatch/endbringer

Matter Reshaper

Market Price: $2.31

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/110993_200w.jpg

({C} represents colorless mana.)
When Matter Reshaper dies, reveal the top card of your library. You may put that card onto the battlefield if it's a permanent card with converted mana cost 3 or less. Otherwise, put that card into your hand.

Buy This Card! https://shop.tcgplayer.com/magic/oath-of-the-gatewatch/matter-reshaper

Warping Wail

Market Price: $0.42

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/110995_200w.jpg

({C} represents colorless mana.)
Choose one —
• Exile target creature with power or toughness 1 or less.
• Counter target sorcery spell.
• Create a 1/1 colorless Eldrazi Scion creature token. It has "Sacrifice this creature: Add {C}."

Buy This Card! https://shop.tcgplayer.com/magic/oath-of-the-gatewatch/warping-wail

Urza's Power Plant

Market Price: $0.74

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/218284_200w.jpg

{T}: Add {C}. If you control an Urza's Mine and an Urza's Tower, add {C}{C} instead.

Buy This Card! https://shop.tcgplayer.com/magic/double-masters/urzas-power-plant

Compared to previous budget builds I've highlighted, Eldrazi Tron offers a slightly steeper price entry due to Thought-Knot Seer and Eldrazi Temple. While discouraging initially, these cards are staples within the strategy and you will get plenty of mileage from them if you upgrade to the optimal build. Even after upgrades, most of the cards you'll replace will make excellent toolbox and metagame options. Eldrazi Tron struggles for maindeck flex slots due to the nature of the strategy. However, there will be instances where Mind Stone will flourish in particular metagames, so it's worth keeping these for future use.

Semi-Budget Eldrazi Tron with Karn, the Great Creator

While you may consider Chalice of the Void as the next pick up, I'd heavily recommend getting Karn, the Great Creator first, as it will unlock various sideboard options allowing a smoother game one. Since Karn's printing, Eldrazi Tron has demonstrated consistent success, despite the banning of Mycosynth Lattice earlier this year. Let's break down why the planeswalker is so good in the Eldrazi Tron shell. 

Karn, the Great Creator's -2 ability opens a world of opportunity with a wish-style sideboard plan. Modern already has a series of artifact hate cards that feature in sideboards across numerous archetypes, and Karn unlocks the option to bring any of those cards in game one. The one-sided Stony Silence effect offers an incredible shift in momentum in your favor, allowing a soft-lock with Liquimetal Coating to ensure board control. Lastly, Karn, the Great Creator can reach back outside of Lightning Bolt-range with its +1 activation, meaning it'll stick around for a few turns. As long as artifacts remain a card type in Magic: The Gathering, Karn, the Great Creator will always have decent wishboard targets.

Magic: The Gathering TCG Deck - Semi Budget Eldrazi Tron by Emmmzyne

'Semi Budget Eldrazi Tron' - constructed deck list and prices for the Magic: The Gathering Trading Card Game from TCGplayer Infinite!

Created By: Emmmzyne

Event:

Rank:

Modern

Market Price: $165.52

Cards

Matter Reshaper

Market Price: $2.31

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/110993_200w.jpg

({C} represents colorless mana.)
When Matter Reshaper dies, reveal the top card of your library. You may put that card onto the battlefield if it's a permanent card with converted mana cost 3 or less. Otherwise, put that card into your hand.

Buy This Card! https://shop.tcgplayer.com/magic/oath-of-the-gatewatch/matter-reshaper

Urza's Mine

Market Price: $0.78

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/218281_200w.jpg

{T}: Add {C}. If you control an Urza's Power-Plant and an Urza's Tower, add {C}{C} instead.

Buy This Card! https://shop.tcgplayer.com/magic/double-masters/urzas-mine

Urza's Power Plant

Market Price: $0.74

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/218284_200w.jpg

{T}: Add {C}. If you control an Urza's Mine and an Urza's Tower, add {C}{C} instead.

Buy This Card! https://shop.tcgplayer.com/magic/double-masters/urzas-power-plant

Liquimetal Coating

Market Price: $1.37

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/166861_200w.jpg

{T}: Target permanent becomes an artifact in addition to its other types until end of turn.

Buy This Card! https://shop.tcgplayer.com/magic/commander-anthology-volume-ii/liquimetal-coating

Skysovereign, Consul Flagship

Market Price: $0.79

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/122670_200w.jpg

Flying
Whenever Skysovereign, Consul Flagship enters the battlefield or attacks, it deals 3 damage to target creature or planeswalker an opponent controls.
Crew 3 (Tap any number of creatures you control with total power 3 or more: This Vehicle becomes an artifact creature until end of turn.)

Buy This Card! https://shop.tcgplayer.com/magic/kaladesh/skysovereign-consul-flagship

Mystic Forge

Market Price: $3.11

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/192786_200w.jpg

You may look at the top card of your library any time.
You may cast artifact spells and colorless spells from the top of your library.
{T}, Pay 1 life: Exile the top card of your library.

Buy This Card! https://shop.tcgplayer.com/magic/core-set-2020/mystic-forge

Sundering Titan

Market Price: $0.24

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/218467_200w.jpg

When Sundering Titan enters the battlefield or leaves the battlefield, choose a land of each basic land type, then destroy those lands.

Buy This Card! https://shop.tcgplayer.com/magic/double-masters/sundering-titan

Witchbane Orb

Market Price: $0.63

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/56344_200w.jpg

When Witchbane Orb enters the battlefield, destroy all Curses attached to you.
You have hexproof. (You can't be the target of spells or abilities your opponents control, including Aura spells.)

Buy This Card! https://shop.tcgplayer.com/magic/innistrad/witchbane-orb

Torpor Orb

Market Price: $5.02

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/39593_200w.jpg

Creatures entering the battlefield don't cause abilities to trigger.

Buy This Card! https://shop.tcgplayer.com/magic/new-phyrexia/torpor-orb

Radiant Fountain

Market Price: $0.08

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/215512_200w.jpg

When Radiant Fountain enters the battlefield, you gain 2 life.
{T}: Add {C}.

Buy This Card! https://shop.tcgplayer.com/magic/core-set-2021/radiant-fountain

Sorcerous Spyglass

Market Price: $0.20

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/198975_200w.jpg

As Sorcerous Spyglass enters the battlefield, look at an opponent's hand, then choose any card name.
Activated abilities of sources with the chosen name can't be activated unless they're mana abilities.

Buy This Card! https://shop.tcgplayer.com/magic/throne-of-eldraine/sorcerous-spyglass

Blast Zone

Market Price: $2.50

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/188636_200w.jpg

Blast Zone enters the battlefield with a charge counter on it.
{T}: Add {C}.
{X}{X}, {T}: Put X charge counters on Blast Zone.
{3}, {T}, Sacrifice Blast Zone: Destroy each nonland permanent with converted mana cost equal to the number of charge counters on Blast Zone.

Buy This Card! https://shop.tcgplayer.com/magic/war-of-the-spark/blast-zone

Ugin, the Ineffable

Market Price: $3.31

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/188862_200w.jpg

Colorless spells you cast cost {2} less to cast.
+1: Exile the top card of your library face down and look at it. Create a 2/2 colorless Spirit creature token. When that token leaves the battlefield, put the exiled card into your hand.
−3: Destroy target permanent that's one or more colors.

Buy This Card! https://shop.tcgplayer.com/magic/war-of-the-spark/ugin-the-ineffable

Endbringer

Market Price: $0.49

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/110690_200w.jpg

Untap Endbringer during each other player's untap step.
{T}: Endbringer deals 1 damage to any target.
{C}, {T}: Target creature can't attack or block this turn.
{C}{C}, {T}: Draw a card.

Buy This Card! https://shop.tcgplayer.com/magic/oath-of-the-gatewatch/endbringer

Ratchet Bomb

Market Price: $0.26

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/218870_200w.jpg

{T}: Put a charge counter on Ratchet Bomb.
{T}, Sacrifice Ratchet Bomb: Destroy each nonland permanent with converted mana cost equal to the number of charge counters on Ratchet Bomb.

Buy This Card! https://shop.tcgplayer.com/magic/double-masters/ratchet-bomb

Reality Smasher

Market Price: $2.84

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/110873_200w.jpg

({C} represents colorless mana.)
Trample, haste
Whenever Reality Smasher becomes the target of a spell an opponent controls, counter that spell unless its controller discards a card.

Buy This Card! https://shop.tcgplayer.com/magic/oath-of-the-gatewatch/reality-smasher

Eldrazi Temple

Market Price: $6.66

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/222388_200w.jpg

{T}: Add {C}.
{T}: Add {C}{C}. Spend this mana only to cast colorless Eldrazi spells or activate abilities of colorless Eldrazi.

Buy This Card! https://shop.tcgplayer.com/magic/the-list/eldrazi-temple

All Is Dust

Market Price: $5.92

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/180778_200w.jpg

Each player sacrifices all colored permanents they control.

Buy This Card! https://shop.tcgplayer.com/magic/ultimate-masters/all-is-dust

Mind Stone

Market Price: $1.06

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/222590_200w.jpg

{T}: Add {C}.
{1}, {T}, Sacrifice Mind Stone: Draw a card.

Buy This Card! https://shop.tcgplayer.com/magic/commander-zendikar-rising/mind-stone

Scavenger Grounds

Market Price: $0.92

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/212458_200w.jpg

{T}: Add {C}.
{2}, {T}, Sacrifice a Desert: Exile all cards from all graveyards.

Buy This Card! https://shop.tcgplayer.com/magic/commander-2020/scavenger-grounds

Ghost Quarter

Market Price: $1.00

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/166821_200w.jpg

{T}: Add {C}.
{T}, Sacrifice Ghost Quarter: Destroy target land. Its controller may search their library for a basic land card, put it onto the battlefield, then shuffle their library.

Buy This Card! https://shop.tcgplayer.com/magic/commander-anthology-volume-ii/ghost-quarter

Eldrazi Mimic

Market Price: $0.78

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/110798_200w.jpg

Whenever another colorless creature enters the battlefield under your control, you may change Eldrazi Mimic's base power and toughness to that creature's power and toughness until end of turn.

Buy This Card! https://shop.tcgplayer.com/magic/oath-of-the-gatewatch/eldrazi-mimic

Spatial Contortion

Market Price: $0.26

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/110699_200w.jpg

({C} represents colorless mana.)
Target creature gets +3/-3 until end of turn.

Buy This Card! https://shop.tcgplayer.com/magic/oath-of-the-gatewatch/spatial-contortion

Tormod's Crypt

Market Price: $0.19

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/215346_200w.jpg

{T}, Sacrifice Tormod's Crypt: Exile all cards from target player's graveyard.

Buy This Card! https://shop.tcgplayer.com/magic/core-set-2021/tormods-crypt

Warping Wail

Market Price: $0.42

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/110995_200w.jpg

({C} represents colorless mana.)
Choose one —
• Exile target creature with power or toughness 1 or less.
• Counter target sorcery spell.
• Create a 1/1 colorless Eldrazi Scion creature token. It has "Sacrifice this creature: Add {C}."

Buy This Card! https://shop.tcgplayer.com/magic/oath-of-the-gatewatch/warping-wail

Grafdigger's Cage

Market Price: $1.62

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/192909_200w.jpg

Creature cards in graveyards and libraries can't enter the battlefield.
Players can't cast spells from graveyards or libraries.

Buy This Card! https://shop.tcgplayer.com/magic/core-set-2020/grafdiggers-cage

Basilisk Collar

Market Price: $2.67

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/218627_200w.jpg

Equipped creature has deathtouch and lifelink.
Equip {2}

Buy This Card! https://shop.tcgplayer.com/magic/double-masters/basilisk-collar

Wastes

Market Price: $2.96

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/110703_200w.jpg

{T}: Add {C}.

Buy This Card! https://shop.tcgplayer.com/magic/oath-of-the-gatewatch/wastes

Dismember

Color Identity:B

Market Price: $2.14

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/98390_200w.jpg

({B/P} can be paid with either {B} or 2 life.)
Target creature gets -5/-5 until end of turn.

Buy This Card! https://shop.tcgplayer.com/magic/modern-masters-2015/dismember

Thought-Knot Seer

Market Price: $7.43

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/222555_200w.jpg

({C} represents colorless mana.)
When Thought-Knot Seer enters the battlefield, target opponent reveals their hand. You choose a nonland card from it and exile that card.
When Thought-Knot Seer leaves the battlefield, target opponent draws a card.

Buy This Card! https://shop.tcgplayer.com/magic/the-list/thought-knot-seer

Expedition Map

Market Price: $0.88

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/218259_200w.jpg

{2}, {T}, Sacrifice Expedition Map: Search your library for a land card, reveal it, and put it into your hand. Then shuffle your library.

Buy This Card! https://shop.tcgplayer.com/magic/double-masters/expedition-map

Urza's Tower

Market Price: $0.78

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/218285_200w.jpg

{T}: Add {C}. If you control an Urza's Mine and an Urza's Power-Plant, add {C}{C}{C} instead.

Buy This Card! https://shop.tcgplayer.com/magic/double-masters/urzas-tower

Karn, the Great Creator

Market Price: $5.52

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/188386_200w.jpg

Activated abilities of artifacts your opponents control can't be activated.
+1: Until your next turn, up to one target noncreature artifact becomes an artifact creature with power and toughness each equal to its converted mana cost.
−2: You may reveal an artifact card you own from outside the game or choose a face-up artifact card you own in exile. Put that card into your hand.

Buy This Card! https://shop.tcgplayer.com/magic/war-of-the-spark/karn-the-great-creator

To incorporate Karn, the Great Creator, I suggest removing a Ugin, the Ineffable, and three Mind Stone. With Karn's addition, I've accommodated the sideboard with silver bullets to promote that game-one advantage. I'd suggest not using all your sideboard slots for Karn targets, as you will want to bring cards in for the more challenging matchups—I recommend no more than 12 to 13 slots for Karn. Eventually, you will want to upgrade into powerful artifacts such as Wurmcoil Engine, Ensnaring Bridge, and perhaps Trinisphere (in that order) to offer a soft-prison strategy. Wurmcoil Engine is an important inclusion, as our aggressive matchups typically lean on Chalice to buy time. Without Chalice of the Void, this becomes difficult, and it's essential to consider life-gain options until you can acquire Chalice of the Void

Optimized Eldrazi Tron

With the addition of Karn, the Great Creator and sideboard options, let's look at how else Eldrazi Tron can be improved. 

Magic: The Gathering TCG Deck - Eldrazi Tron (Optimal) by Emmmzyne

'Eldrazi Tron (Optimal)' - constructed deck list and prices for the Magic: The Gathering Trading Card Game from TCGplayer Infinite!

Created By: Emmmzyne

Event:

Rank:

Modern

Market Price: $372.03

Cards

Ghost Quarter

Market Price: $1.00

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/166821_200w.jpg

{T}: Add {C}.
{T}, Sacrifice Ghost Quarter: Destroy target land. Its controller may search their library for a basic land card, put it onto the battlefield, then shuffle their library.

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Mystic Forge

Market Price: $3.11

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/192786_200w.jpg

You may look at the top card of your library any time.
You may cast artifact spells and colorless spells from the top of your library.
{T}, Pay 1 life: Exile the top card of your library.

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Wastes

Market Price: $2.96

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/110703_200w.jpg

{T}: Add {C}.

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Sorcerous Spyglass

Market Price: $0.20

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As Sorcerous Spyglass enters the battlefield, look at an opponent's hand, then choose any card name.
Activated abilities of sources with the chosen name can't be activated unless they're mana abilities.

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Ensnaring Bridge

Market Price: $12.70

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/218601_200w.jpg

Creatures with power greater than the number of cards in your hand can't attack.

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Urza's Mine

Market Price: $0.78

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/218281_200w.jpg

{T}: Add {C}. If you control an Urza's Power-Plant and an Urza's Tower, add {C}{C} instead.

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All Is Dust

Market Price: $5.92

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Each player sacrifices all colored permanents they control.

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Radiant Fountain

Market Price: $0.08

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When Radiant Fountain enters the battlefield, you gain 2 life.
{T}: Add {C}.

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Matter Reshaper

Market Price: $2.31

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({C} represents colorless mana.)
When Matter Reshaper dies, reveal the top card of your library. You may put that card onto the battlefield if it's a permanent card with converted mana cost 3 or less. Otherwise, put that card into your hand.

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Skysovereign, Consul Flagship

Market Price: $0.79

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Flying
Whenever Skysovereign, Consul Flagship enters the battlefield or attacks, it deals 3 damage to target creature or planeswalker an opponent controls.
Crew 3 (Tap any number of creatures you control with total power 3 or more: This Vehicle becomes an artifact creature until end of turn.)

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Thought-Knot Seer

Market Price: $7.43

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({C} represents colorless mana.)
When Thought-Knot Seer enters the battlefield, target opponent reveals their hand. You choose a nonland card from it and exile that card.
When Thought-Knot Seer leaves the battlefield, target opponent draws a card.

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Expedition Map

Market Price: $0.88

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{2}, {T}, Sacrifice Expedition Map: Search your library for a land card, reveal it, and put it into your hand. Then shuffle your library.

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Blast Zone

Market Price: $2.50

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Blast Zone enters the battlefield with a charge counter on it.
{T}: Add {C}.
{X}{X}, {T}: Put X charge counters on Blast Zone.
{3}, {T}, Sacrifice Blast Zone: Destroy each nonland permanent with converted mana cost equal to the number of charge counters on Blast Zone.

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Wurmcoil Engine

Market Price: $14.11

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/218392_200w.jpg

Deathtouch, lifelink
When Wurmcoil Engine dies, create a 3/3 colorless Wurm artifact creature token with deathtouch and a 3/3 colorless Wurm artifact creature token with lifelink.

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Liquimetal Coating

Market Price: $1.37

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{T}: Target permanent becomes an artifact in addition to its other types until end of turn.

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Basilisk Collar

Market Price: $2.67

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Equipped creature has deathtouch and lifelink.
Equip {2}

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Spatial Contortion

Market Price: $0.26

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/110699_200w.jpg

({C} represents colorless mana.)
Target creature gets +3/-3 until end of turn.

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Endbringer

Market Price: $0.49

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Untap Endbringer during each other player's untap step.
{T}: Endbringer deals 1 damage to any target.
{C}, {T}: Target creature can't attack or block this turn.
{C}{C}, {T}: Draw a card.

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Urza's Power Plant

Market Price: $0.74

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/218284_200w.jpg

{T}: Add {C}. If you control an Urza's Mine and an Urza's Tower, add {C}{C} instead.

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Karn, the Great Creator

Market Price: $5.52

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/188386_200w.jpg

Activated abilities of artifacts your opponents control can't be activated.
+1: Until your next turn, up to one target noncreature artifact becomes an artifact creature with power and toughness each equal to its converted mana cost.
−2: You may reveal an artifact card you own from outside the game or choose a face-up artifact card you own in exile. Put that card into your hand.

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Mind Stone

Market Price: $1.06

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/222590_200w.jpg

{T}: Add {C}.
{1}, {T}, Sacrifice Mind Stone: Draw a card.

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Warping Wail

Market Price: $0.42

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/110995_200w.jpg

({C} represents colorless mana.)
Choose one —
• Exile target creature with power or toughness 1 or less.
• Counter target sorcery spell.
• Create a 1/1 colorless Eldrazi Scion creature token. It has "Sacrifice this creature: Add {C}."

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Urza's Tower

Market Price: $0.78

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/218285_200w.jpg

{T}: Add {C}. If you control an Urza's Mine and an Urza's Power-Plant, add {C}{C}{C} instead.

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Tectonic Edge

Market Price: $0.57

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/94496_200w.jpg

{T}: Add {C}.
{1}, {T}, Sacrifice Tectonic Edge: Destroy target nonbasic land. Activate this ability only if an opponent controls four or more lands.

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Ratchet Bomb

Market Price: $0.26

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/218870_200w.jpg

{T}: Put a charge counter on Ratchet Bomb.
{T}, Sacrifice Ratchet Bomb: Destroy each nonland permanent with converted mana cost equal to the number of charge counters on Ratchet Bomb.

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Reality Smasher

Market Price: $2.84

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/110873_200w.jpg

({C} represents colorless mana.)
Trample, haste
Whenever Reality Smasher becomes the target of a spell an opponent controls, counter that spell unless its controller discards a card.

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Tormod's Crypt

Market Price: $0.19

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/215346_200w.jpg

{T}, Sacrifice Tormod's Crypt: Exile all cards from target player's graveyard.

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Walking Ballista

Market Price: $8.94

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/218628_200w.jpg

Walking Ballista enters the battlefield with X +1/+1 counters on it.
{4}: Put a +1/+1 counter on Walking Ballista.
Remove a +1/+1 counter from Walking Ballista: It deals 1 damage to any target.

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Chalice of the Void

Market Price: $38.36

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/161358_200w.jpg

Chalice of the Void enters the battlefield with X charge counters on it.
Whenever a player casts a spell with converted mana cost equal to the number of charge counters on Chalice of the Void, counter that spell.

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Witchbane Orb

Market Price: $0.63

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/56344_200w.jpg

When Witchbane Orb enters the battlefield, destroy all Curses attached to you.
You have hexproof. (You can't be the target of spells or abilities your opponents control, including Aura spells.)

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Eldrazi Temple

Market Price: $6.66

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/222388_200w.jpg

{T}: Add {C}.
{T}: Add {C}{C}. Spend this mana only to cast colorless Eldrazi spells or activate abilities of colorless Eldrazi.

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Ugin, the Ineffable

Market Price: $3.31

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/188862_200w.jpg

Colorless spells you cast cost {2} less to cast.
+1: Exile the top card of your library face down and look at it. Create a 2/2 colorless Spirit creature token. When that token leaves the battlefield, put the exiled card into your hand.
−3: Destroy target permanent that's one or more colors.

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Grafdigger's Cage

Market Price: $1.62

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/192909_200w.jpg

Creature cards in graveyards and libraries can't enter the battlefield.
Players can't cast spells from graveyards or libraries.

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Scavenger Grounds

Market Price: $0.92

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/212458_200w.jpg

{T}: Add {C}.
{2}, {T}, Sacrifice a Desert: Exile all cards from all graveyards.

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Sundering Titan

Market Price: $0.24

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When Sundering Titan enters the battlefield or leaves the battlefield, choose a land of each basic land type, then destroy those lands.

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Dismember

Color Identity:B

Market Price: $2.14

ImageURL: https://tcgplayer-cdn.tcgplayer.com/product/98390_200w.jpg

({B/P} can be paid with either {B} or 2 life.)
Target creature gets -5/-5 until end of turn.

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Chalice of the Void almost doubles the price of the list, which shows how unique and impressive the card is. Leaving Chalice until last is a sensible option, as it's best to pick up the cheaper cards within your budget. Picking up Walking Ballista is a reasonable next step to replace an Endbringer and two Spatial Contortion.

However, there is a world where Eldrazi Mimic may be well suited in particular metagames. Demoting Chalice of the Void to the sideboard may seem odd; however, Karn, the Great Creator can still call up the artifact during game one if required. I've experienced modest success with Eldrazi Mimic in my local metagame that was rife with Scapeshift and Ad Nauseam, so it's worth showing proactive deck building since Modern metagames can shift often. 

Tips and Tricks

Lastly, as we are knee-deep in Core Set 2021 previews, we are beginning to see desirable reprints such as Ugin, the Spirit Dragon come back into Standard. While it's not currently viable in Eldrazi Tron, it's worth keeping an eye out on the planeswalker's price for application in Mono-Green Tron, given both strategies share the same cards. Additionally, we are beginning to see a price decrease on Karn Liberated in light of its suspected reprint in Double Masters. If you want to change from Eldrazi Tron, shifting into Mono-Green Tron is becoming easier thanks to these potential reprints. Mono-Green Tron is a constant feature of the Modern landscape and is an excellent default option in the format. 

Tron has remained an ever-present archetype within Modern, and that won't change anytime soon. Even better, the core cards can support multiple strategies depending on your playstyle—Mono-Blue Tron centers around being in control, while Eldrazi Tron cares about creatures. Ultimately, Tron provides plenty of depth and will remain in Modern in years to come.