Well, we all knew it was coming. With Eldrazi being such a huge part of Modern Horizons 3, it was only a matter of time before a deck built around them broke into the Modern format. In an MTG Modern Preliminary just yesterday, Selesneal’s RG Eldrazi list did just that. The deck took first place in the tournament, with an overall 3-1 record.
Not only does this mark the return of a beloved (and beloathed) archetype, it also serves as a stellar showcase for the new cards MH3 brings to the table. No less than seven new cards feature here, accounting for 10 of the maindeck cards and 6 in the sideboard. As Magic’s spaghetti titans take their first slithering steps into the new Modern, we thought we’d stop and analyze their trails. What makes the new Eldrazi tick? Read on to find out.
A New RG Eldrazi MTG Brew

RG Eldrazi is, essentially, a brand-new MTG archetype, spurred on by the new cards introduced in Modern Horizons 3. We’ve seen plenty of Modern Eldrazi decks before, of course, but none that play quite like this. The deck leverages fast mana from
Eldrazi Temple

{T}: Add {C}{C}. Spend this mana only to cast colorless Eldrazi spells or activate abilities of colorless Eldrazi.
et al to power out chunky Eldrazi early. Very early, if it can get them out via
Through the Breach

Splice onto Arcane {2}{R}{R} (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)
.
In that sense, RG Eldrazi plays a bit like a cross between a Ramp deck and a Combo deck. It can absolutely play a fair game and cast its threats for real mana. It can also drop an
Emrakul, the Aeons Torn

When you cast this spell, take an extra turn after this one.
Flying, protection from spells that are one or more colors, annihilator 6
When Emrakul is put into a graveyard from anywhere, its owner shuffles their graveyard into their library.
with Through the Breach and end the game on turn three. The deck has options, basically.
To filter through those options, RG Eldrazi also includes some classic card advantage in
Ancient Stirrings


When The One Ring enters, if you cast it, you gain protection from everything until your next turn.
At the beginning of your upkeep, you lose 1 life for each burden counter on The One Ring.
{T}: Put a burden counter on The One Ring, then draw a card for each burden counter on The One Ring.
. The former smooths out your early draws, while the latter pushes you through to a win, while also serving as an excellent outlet for all the early colorless mana the deck can produce.
Aside from these, the deck plays a package of beefy Eldrazi as its core threats. We’ve covered Emrakul, but it also runs the full playset of
Thought-Knot Seer

When this creature enters, target opponent reveals their hand. You choose a nonland card from it and exile that card.
When this creature leaves the battlefield, target opponent draws a card.
, a survivor of the first Eldrazi Winter. This helps to disrupt opponents early, before really twisting the knife in with an
All is Dust

Main Deck Additions

But you’ve seen all of that before. What’s really exciting about Selesneal’s RG Eldrazi deck is the sheer volume of brand new MTG cards they’ve managed to cram in there. First and foremost among these:
Ugin’s Labyrinth

{T}: Add {C}. If a card is exiled with this land, add {C}{C} instead.
{T}: Return the exiled card to its owner's hand.
. Alongside Eldrazi Temple, this gives the deck access to eight total ‘Sol Lands,’ or lands that tap for two colorless mana. This kind of early acceleration can be incredibly dangerous, especially when the majority of the deck requires only colorless mana to function.
Of course, Labyrinth does have a downside. You need to exile a pricey colorless card from your hand in order to use it in the first place. Emrakul and All is Dust are valid pitches here, but so is
Devourer of Destiny

When you cast this spell, exile target permanent that's one or more colors.
, another incredibly important piece from MH3. Normally, keeping a big creature like this in your opener would hurt your chances of winning. Devourer has a ‘start of game’ effect, however, which lets your filter your draws for free if you do keep it in the mulligan. It can also pitch to Labyrinth early, and even be a reasonable threat in its own right later on. An all-round banger, basically.
Rounding out the new cards in the main deck, we have the most fearsome of the new Eldrazi Titans:
Ulamog, the Defiler

Ward—Sacrifice two permanents.
Ulamog enters with a number of +1/+1 counters on it equal to the greatest mana value among cards in exile.
Ulamog has annihilator X, where X is the number of +1/+1 counters on it.
. While it costs a whopping 10 mana, no small feat even for a deck like this, attacking with it even once should end the game immediately. If you need some extra help casting it,
Kozilek’s Command

• Target player creates X 0/1 colorless Eldrazi Spawn creature tokens with "Sacrifice this token: Add {C}."
• Target player scries X, then draws a card.
• Exile target creature with mana value X or less.
• Exile up to X target cards from graveyards.
has your back. As with all Commands it’s an incredibly flexible card, but the mode that creates Eldrazi Spawn tokens is particularly useful here. Of course, exiling creatures and drawing cards ain’t too shabby either.
Sauce On The Side

It’s not just Selesneal’s main deck that’s packed with MH3 goodness. Their sideboard has plenty of new cards, too.
Vexing Bauble

{1}, {T}, Sacrifice this artifact: Draw a card.
is conspicuously absent, as the sideboard card everyone had their money on during preview season. In its place, however, sits
Disruptor Flute

As this artifact enters, choose a card name.
Spells with the chosen name cost {3} more to cast.
Activated abilities of sources with the chosen name can't be activated unless they're mana abilities.
. In the combo-heavy early days of MH3, this card is a dream come true. You can either pre-emptively slow down a key combo piece, or lock one out of the game entirely, depending on the card in question.
Shuko

Equip {0} ({0}: Attach to target creature you control. Equip only as a sorcery.)
, for example, folds completely to Flute’s second ability, indirectly clipping
Nadu, Winged Wisdom

Creatures you control have "Whenever this creature becomes the target of a spell or ability, reveal the top card of your library. If it's a land card, put it onto the battlefield. Otherwise, put it into your hand. This ability triggers only twice each turn."
‘s pesky wings. It can really throw a spanner in the works for the new
Ral, Monsoon Mage

Whenever you cast an instant or sorcery spell during your turn, flip a coin. If you lose the flip, Ral deals 1 damage to you. If you win the flip, you may exile Ral. If you do, return him to the battlefield transformed under his owner's control.
Ruby Storm decks as well. As long as combo decks keep putting up results, Disruptor Flute will keep being a great sideboard option. Even more so here, since it can come down on turn one via Ugin’s Labyrinth.
Beyond the Flute,
Null Elemental Blast

• Counter target multicolored spell.
• Destroy target multicolored permanent.
features, as an on-color answer to pretty much everything Domain Zoo is doing. It has few targets outside of this matchup, but that’s just fine for a sideboard piece this efficient.
Lastly, Selesneal includes a couple of copies of
Thief of Existence

When you cast this spell, exile up to one target noncreature, nonland permanent an opponent controls with mana value 4 or less. If you do, Thief of Existence gains "When this creature leaves the battlefield, target opponent draws a card."
in the board. It’s hard to view this humble Eldrazi as anything more than an efficient answer to The One Ring, but that’s an important enough card in the format to warrant the inclusion regardless. Notably, it can also hit Leyline of the Guildpact[tooltips] in the Domain matchup, with no risk of falling foul of a [tooltips]Stubborn Denial, since the exile effect is a cast trigger.
To Slay A Spaghetti Monster

It’s a great time to be an Eldrazi fan, then. But if Selesneal’s deck takes off, or inspires imitators in other colors, then you’ll need to know how to defend yourself against Zendikar’s eldritch enemies. Here are a few suggestions for your own sideboard that can help turn the tide in an Eldrazi matchup.
First up: Infernal Reckoning[/tooltip]. Many identified this as a potential financial spec as soon as MH3’s Eldrazi theme was revealed, but its price point remains reasonable. For now. Getting rid of any colorless creature and gaining life for just one mana is an incredible deal. Granted, the card is useless against Emrakul, but it can take out a Thought-Knot Seer or Devourer of Destiny. Speaking of Emrakul, one of the best answers to it actually comes in MH3 itself: [tooltips]Flare of Malice. At instant speed, for no mana, this is a clean answer to an Emrakul cheated in from Through the Breach. Just be sure to use it before your opponent declares their attack, or Annihilator will still kick in. This is best in a deck that can leverage the alternate cost, but in a pinch any black deck can use it.
If you want to take a less direct approach, you can try attacking Eldrazi decks at the source of their power: their fast mana. Removing their Eldrazi Temples and Ugin’s Labyrinths will slow them down a ton, giving you time to race them effectively.
Sundering Eruption

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