The main set for Modern Horizons 3 has almost been completely revealed! If the unofficial leaks are added to the equation, we have technically seen all of Modern Horizons 3 already. That said, some cards still need confirmation, and a series of these are being confirmed today. Once the day ends, all of Modern Horizons 3 will be revealed.
Today, a new Bestow creature was revealed that has a lot more going on than it may seem. This is only partially thanks to its own abilities, as it threatens an absolutely insane combo. Should everything go to plan, this card enables kills as early as turn three in Modern. So, let’s take a look at Springheart Nantuko, and why it creates a deadly combo with
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."
, and
Shuko

Equip {0} ({0}: Attach to target creature you control. Equip only as a sorcery.)
!
Springheart Nantuko

Springheart Nantuko looks eerily familiar to
Scute Swarm

Nadu, Winged Wisdom

If you haven’t been keeping up, Nadu, Winged Wisdom has created a ton of buzz lately. The ability to grant two
Coiling Oracle

Shuko

Thanks to being tutorable via Urza’s Saga, Shuko is definitely the best enabler for Nadu, Winged Wisdom, at least in competitive formats. Shuko does this with its equip zero cost. This enables Shuko to constantly target your creatures for equips, triggering Nadu, Winged Wisdom as many times as possible.
This interaction has already caused a massive price spike for Shuko. Thanks to this card only being printed in Betrayers of Kamigawa, any interest in Shuko is going to cause a massive spike in price. Just look at how expensive
Sensei’s Divining Top

{T}: Draw a card, then put this artifact on top of its owner's library.
got!
With Shuko and Nadu assembled you could essentially draw your entire deck and play all of your lands out as long as you have enough creatures. How do we do that? Springheart Nantuko is the answer!
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Devasting Turn Three Combo
Springheart Nantuko is the missing piece to making the Nadu, Winged Wisdom and Shuko combo go infinite. The problem of not having enough bodies is resolved by the ability to create multiple Insect tokens. Since Springheart Nantuko creates Insects on Landfall, and Nadu’s trigger can put them into play from the top of your deck, Springheart Nantuko can create Insects whenever Nadu reveals a land, granting two more triggers for Shuko and Nadu.
Of course, there can be some instances where you simply don’t hit a land with the triggers you have, and the chain stops. The best way to avoid this is to utilize some cheap cantrip effects that can help fix your deck during combo sequences. These can also help find your combo pieces to go off.

Preordain is a recently unbanned Modern card that can do a ton of work in this shell. Not only can it help find your combo pieces, but Preordain can help stack lands on top of your deck for Nadu to put on the battlefield once you have the combo assembled.
In a similar vein,
Serum Visions

An alternative approach to this deck could be using a similar creature toolbox structure to Golgari Yawgmoth combo.
Chord of Calling

Search your library for a creature card with mana value X or less, put it onto the battlefield, then shuffle.
looks like a powerful way to enable the combo and could be quite impressive if there are creatures that can do the Shuko portion of the combo. That said, Shuko is searchable via
Urza’s Saga

I — This Saga gains "{T}: Add {C}."
II — This Saga gains "{2}, {T}: Create a 0/0 colorless Construct artifact creature token with 'This token gets +1/+1 for each artifact you control.'"
III — Search your library for an artifact card with mana cost {0} or {1}, put it onto the battlefield, then shuffle.
, which encourages a different kind of structure for this deck.
Urza’s Saga alone offers a powerful midrange alternative that the Nadu combo deck can take. Similar to the
Grinding Station

Whenever an artifact enters, you may untap this artifact.
decks of the past, you can threaten an infinite combo, an opportunity to gain a ton of value, or a midrange plan to overwhelm your opponents if they plan to attack your deck from one angle.
Will this Combo be Competitive?
There is a good chance that some variant of the Shuko and Nado, Winged Wisdom interaction will become competitive. Shuko being searchable via Urza’s Saga and Nado replacing itself in most situations allows this to be incredibly competitive. The weakest card in this idea of the combo is the new Springheart Nantuko since it doesn’t produce much value on its own.
That said, there are a bunch of different ways to abuse the Shuko and Nado combo. Will this be the one that takes over Modern? Only time will tell. Ultimately, we’re just going to have to wait and see what happens when Modern Horizons 3 launches. Since this set is so jam-packed with power, it’s basically guaranteed that Modern will rotate a fair amount. Once all the dust settles, it’s anyone’s guess whether or not this combo will be competitive or just unique.
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