Revenant Recon precon upgrade guide

Twenty-three cards in this box surveil. Seven of them can do it more than once, and Mirko counts the times, not the cards.

Mirko, Obsessive Theorist gains a +1/+1 counter every time you surveil, and at the beginning of your end step he returns a creature card from your graveyard with power less than his. Those two lines are one machine. The counters raise the ceiling on the returns, and the returns are the reason to want the counters.

The trigger fires once per surveil instruction. Surveil 1 and surveil 4 move Mirko exactly the same distance.

The box was assembled as though the number on the card mattered, and it stocked its best creatures at power 6, which is six triggers away from the turn Mirko lands. Almost every swap below closes that gap from one end or the other.

What are the best Revenant Recon upgrades?

Six purchases, and the first four are one idea bought four times over: more surveil triggers, and something worth returning once they land. Every price here is the Scryfall market number for that card's default printing, read on 10 September 2026.

1. Body Double, $0.31. A 0-power card that enters as a copy of any creature card in a graveyard. Mirko can return it on the turn he arrives, and it comes back as Grave Titan.
2. Gossip's Talent, Snarling Gorehound and Umbral Collar Zealot, $0.79 for all three. Three surveil triggers that fire off things this deck was already doing. Nothing else on the list is close to this rate.
3. Twilight Diviner, $2.34. Makes a token copy of any creature that enters from a graveyard, once a turn. Mirko puts one there every end step.
4. Four blue-black lands, $12.70 for the set. Shipwreck Marsh, Drowned Catacomb, Darkslick Shores and Underground River. The box is fifteen sources short on double black and this is most of the fix.
5. Matoya, Archon Elder, $0.51. Draws a card every time you surveil. Twenty-eight cards in the upgraded deck turn that on.
6. Kaito, Bane of Nightmares, $9.31. A free surveil every turn that also attacks as a 3/4, and the only add here paying real money for the engine rather than for the mana base.

The one purchase I would happily leave out is Undercity Sewers at $17.00, which is more than a third of the list on its own. It is a blue-black dual that surveils when it enters, so the trigger is genuine rather than a rounding error, but it enters tapped and $17.00 buys a lot of the rest of this page.

Surveil 4 and surveil 1 are worth the same counter

This is the rule the box appears not to have read. Surveil is a single event no matter how many cards it looks at, so anything reading “whenever you surveil” triggers once. Otherworldly Gaze surveils three cards for one blue mana and grows Mirko as much as Consider does. Dream Eater surveils four for six mana and grows him as much as Consider does.

That is not an argument against the big ones. Otherworldly Gaze is excellent, and it has flashback, which is a second event. It is an argument about what to buy: the deck wants more surveil instructions, and the cheapest way to get them is a permanent that produces one every turn for nothing.

The box ships seven cards that surveil more than once without being recast:

• Sinister Starfish taps for it, every turn, free.
• Doom Whisperer charges 2 life and has no limit, which makes it the fastest way in the box to get Mirko to a specific number on a specific turn.
• Case of the Shifting Visage and Unshakable Tail each do it at your upkeep.
• Nightveil Sprite does it when it attacks.
• Tocasia's Dig Site wants {3} and a tap, which is a real cost but a repeatable one.
• Watcher of Hours does it on each of the six upkeeps it spends suspended. More on that one below.

The other sixteen are one-shots. Five of the adds on this page are permanents that join the first group, taking it from seven to twelve.

Three creature cards in the box are legal targets on the turn Mirko lands

Mirko is a 1/3, so on the turn he resolves he returns a creature card with power 0. There are three of those in the ninety-nine, and two are clones with nothing to copy yet.

Here is the whole gate, counted in triggers rather than in counters, because triggers are the thing you can plan around:

• Zero triggers unlocks Phyrexian Metamorph, Vizier of Many Faces and Sinister Starfish.
• One trigger adds Baleful Strix, Lazav, the Multifarious, Marvo, Deep Operative, Final-Word Phantom, Nightveil Sprite, Whispering Snitch and Dimir Spybug.
• Two triggers adds Ravenous Chupacabra, Mulldrifter, Twilight Prophet, Dogged Detective, Copy Catchers and Thoughtbound Phantasm.
• Three triggers adds Shriekmaw, Master of Death, Eye of Duskmantle, Unshakable Tail and Amphin Mutineer, which is twenty-one of the twenty-nine.
• Four triggers adds Dream Eater. Five adds Overseer of the Damned and Syr Konrad, the Grim.
• Six triggers adds the five the box is actually built around: Grave Titan, Massacre Wurm, Doom Whisperer, Watcher of Hours and Sphinx of the Second Sun.

Read the top of that list and the bottom together. The cards Mirko reaches immediately are cheap value creatures whose whole contribution is an enters-the-battlefield trigger, and returning one of those every turn is a fine engine. The cards the deck spent its rare slots on sit behind six triggers, and six is a real ask when sixteen of the twenty-three surveil sources fire once and are done.

Two honest answers to that gap exist. Get to six triggers faster, or find a card with power 0 that turns into a 6/6 on arrival.

Body Double reads the power the card had, not the power it will have

Body Double is a 0/0 Shapeshifter that enters as a copy of any creature card in a graveyard. Mirko checks the power of the card he targets, which is 0, so Body Double is legal for him with no counters on him at all. What it enters as is your choice, and Grave Titan is usually still sitting there.

That is the cleanest thing a dollar can do to this deck. It is also why the two clones already in the box are staying. Phyrexian Metamorph and Vizier of Many Faces are 0-power cards for the same reason, and the upgraded list runs four Shapeshifters once you count Body Double and Lazav.

Twilight Diviner attacks the problem from the other side. Whenever another creature you control enters, and it entered or was cast from a graveyard, the Diviner makes a token copy of it. Mirko puts a creature onto the battlefield from a graveyard at the beginning of every one of your end steps, so the Diviner doubles it, and the token is not carrying a finality counter.

The three cheap permanents are where the counters come from:

• Gossip's Talent surveils whenever a creature you control enters. Mirko's end step return is a creature entering, and so is every token Twilight Diviner makes.
• Snarling Gorehound surveils whenever another creature you control with power 2 or less enters. That is a strange clause to read cold and an obvious one here, because power 2 or less is precisely what Mirko can return early.
• Umbral Collar Zealot surveils for the cost of sacrificing another creature or artifact, with no limit. Unshakable Tail already investigates whenever a creature card reaches your graveyard from your library, which is what surveil does about a third of the time in a deck holding thirty-three creatures. Surveil, mill a creature, take a Clue, sacrifice the Clue, surveil again. One caution: a creature Mirko returned carries a finality counter, so sacrificing that one exiles it. Feed the Zealot Clues and fresh bodies, not the recursion.

Matoya, Archon Elder turns the whole axis into card draw at one card per surveil, and Kaito, Bane of Nightmares is a repeatable free surveil that is also a hexproof 3/4 on your own turns, which means he attacks but never blocks. Swiftfoot Boots is the concession to all of this living on a 1/3. The counters do not come back when Mirko does, so every removal spell aimed at him resets the ceiling to power 0. Lightning Greaves is the cheaper option if you would rather not pay $1.96, though its shroud means nothing of yours can target Mirko afterwards, a second Equipment included.

Five lands tap for colourless, and three more earn it

Thirty-seven lands is the right number and I have not changed it. What I have changed is what eight of them produce.

The box asks for double black by turn three on fifteen different cards and offers twenty-one black sources, which the hypergeometric maths puts at 61%. Double blue is seven cards against twenty-two sources, at 63.9%. Both are a long way from the 90% a mana base is normally built to, and the reason sits in plain sight: eight of the thirty-seven lands make no coloured mana at all.

Three of the eight earn it and stay. Ash Barrens basic-landcycles for {1}, so it is a coloured source that arrives as a card. Myriad Landscape fetches two basics, which is ramp and fixing in one land. Tocasia's Dig Site is a repeatable surveil trigger, and this whole page argues those are worth paying for.

The other five come out:

• Reliquary Tower is redundant on arrival. Thought Vessel is already in the box and already says you have no maximum hand size.
• Temple of the False God produces nothing until you control five lands, and the turns this deck needs a fifth mana are the turns it casts Doom Whisperer or Overseer of the Damned, both of which want black pips it cannot supply.
• Rogue's Passage charges {4} to make one creature unblockable in a deck already fielding thirteen fliers.
• Hostile Desert becomes a 3/4 for {2} and an exiled land, which is a fine rate on the wrong resource. This deck wants cards in its graveyard, not out of it.
• Drownyard Temple returns itself for {3}. That is a land you can rebuy, and it is still a land that taps for colourless.

In come Shipwreck Marsh, Drowned Catacomb, Darkslick Shores, Underground River and Undercity Sewers. Black goes from twenty-one sources to twenty-seven, blue from twenty-two to twenty-eight.

Be honest about what that does to the tapped count, because it does not improve it. Unconditionally tapped lands go from five to six, and the three check-style lands read as conditional rather than untapped. In practice Drowned Catacomb is untapped from your second land drop with eighteen basics in the deck, Darkslick Shores is untapped on the first three, and Shipwreck Marsh is untapped from the third onward, so between them they cover the whole curve. Undercity Sewers is the deliberate exception, and the surveil trigger is what it buys.

One land I looked at and left out: Morphic Pool is untapped in any pod with two or more opponents and costs $29.12, which is more than the four replacement duals put together. Watery Grave is the other obvious name, and I skipped that one on merit rather than on price. This deck already charges you life on Phyrexian Arena, Doom Whisperer, Notion Rain, Toxic Deluge, Master of Death and Deep Analysis. A shockland is a worse deal in a list paying out that often than its raw card quality suggests.

Eight mana for two extra upkeeps

Ten spells leave alongside the five lands.

• Sphinx of the Second Sun gives you an extra beginning phase, meaning an extra untap, upkeep and draw. It does not give you an extra end step, so it does not give you an extra Mirko return. What it gives you here is a second Case of the Shifting Visage trigger and a second Unshakable Tail trigger, for eight mana. Two surveils is Consider plus Curate, and those cost three between them.
• Rise of the Dark Realms costs nine and does once, loudly, what the commander does every turn for free.
• Charnel Serenade is six mana for surveil 3 and one return, or three mana to suspend it and wait three turns. Removing its time counters does nothing on the way, which is the whole difference between it and Watcher of Hours.
• Black Sun's Zenith actively fights the commander. Its counters are -1/-1 counters, and -1/-1 counters annihilate +1/+1 counters as a state-based action, so casting it for three strips three counters off Mirko permanently and lowers his ceiling by three creatures. Toxic Deluge stays for exactly this reason. It is -X/-X until end of turn and leaves the counters alone.
• Foreboding Steamboat asks every player, you included, to exile two of their own creatures until it leaves. Exile is the one zone this deck cannot recur from.
• Enhanced Surveillance lets you look at two additional cards each time you surveil, which is more cards and not more triggers, and its other mode shuffles your graveyard into your library. That is the deck's resource, not a mess to be tidied up.
• Disinformation Campaign returns itself to your hand whenever you surveil. In a deck with twenty-three surveil sources that is not a value engine, it is a three-mana spell you recast forever.
• Counterpoint is a five-mana counterspell. Marvo, Deep Operative is a five-mana 1/8 whose card advantage is a coin flip. Amphin Mutineer exiles a creature and hands its controller a 4/3, a trade this deck can make with Ravenous Chupacabra or Shriekmaw instead.

Watcher of Hours is a two-mana card

Three cards here look like obvious cuts and are not.

Watcher of Hours is printed at {5}{U} and nobody casts it for that. Suspend 6 costs {1}{U}, and its second line surveils every time you remove a time counter while it is exiled. Play it on turn two and it hands Mirko a trigger on each of your next six upkeeps, then unsuspends as a free 6/6 flier with ward {3}. It is the best two-mana play in the box and it reads like a six-drop.

Doom Whisperer is a six-drop with no upper limit on its activations, which makes it the only card in the deck that can decide to put Mirko at power 7 on a particular turn. That is worth six mana in a deck built around a number.

Connive // Concoct is the other way past the power gate. Concoct is five mana for surveil 3 and a return with no power restriction at all, so it is the card that puts Massacre Wurm on the battlefield while Mirko is still a 3/5. Grave Titan and Massacre Wurm stay for the same reason. They are what Body Double and Concoct are aiming at, and the deck should still be able to hard-cast them.

Black goes from fifteen sources short to nine

Every number here describes the upgraded list, not the box.

Double black by turn three moves from 61% to 76.4%, and the count of cards asking for it drops from fifteen to eleven, with the cheapest of them moving from mana value 2 to mana value 3. Double blue moves from 63.9% to 78.5%. Single black by turn two goes from three sources short to three clear, at 93%, and single blue from two short to four clear, at 93.8%.

Average mana value falls from 3.5 to 3.15, and cards at mana value 6 or more go from eleven to eight. Ramp goes from seven to eight and stops reading as low. Creature count rises from thirty to thirty-three, and surveil sources rise from twenty-three to twenty-eight, of which twelve rather than seven fire more than once.

The bracket floor is 1 before and after. Nothing on this list is a Game Changer, and nothing on it is trying to be.

All fifteen adds together come to $45.97. The five lands are $29.70 of that and Undercity Sewers alone is $17.00, which leaves the six cards doing the most work on this page, Body Double, Gossip's Talent, Snarling Gorehound, Umbral Collar Zealot, Twilight Diviner and Matoya, Archon Elder, at $3.95 between them.

The upgraded decklist

The finished ninety-nine with all fifteen swaps applied. Hover any card name on this page, here or in the prose above, to see the card and what it costs today.

Load into the deck builder Copy decklist

“Load into the deck builder” opens this list in your account, pinned to the printings the box shipped, ready to edit or save. “Copy decklist” gives you plain text for Moxfield, Archidekt or Arena — no account needed.

FAQ

Does surveil 3 put three counters on Mirko?

No. Surveil is a single event however many cards it looks at, so Mirko gets exactly one +1/+1 counter whether you surveil 1 or surveil 4. That is why this guide spends most of its budget on cheap permanents that surveil every turn rather than on spells with a bigger number printed on them. Otherworldly Gaze surveils three cards for one mana and moves him as far as Consider does.

What can Mirko bring back on the turn he comes down?

A creature card with power 0, because he arrives as a 1/3 and his end step trigger reads power less than his. In the box that is Phyrexian Metamorph, Vizier of Many Faces and Sinister Starfish. Adding Body Double for $0.31 is the biggest single change on this page, because it is a 0-power card that enters as a copy of any creature card in a graveyard, which usually means Grave Titan.

Why cut Black Sun's Zenith but keep Toxic Deluge?

Because -1/-1 counters and +1/+1 counters annihilate each other as a state-based action. Casting Black Sun's Zenith for three permanently strips three counters off Mirko and lowers the power ceiling on everything he can return. Toxic Deluge is -X/-X until end of turn, so it kills the same creatures without touching the counters you spent the game accumulating.

Is Undercity Sewers worth $17 when it enters tapped?

It is the card on this list I would drop first if the budget is tight. It taps for blue or black and surveils when it enters, which in this deck is a real counter on the commander rather than a bonus, but $17.00 is over a third of the whole fifteen-card list and Drowned Catacomb does the colour half of the job for $1.22.

How much do all fifteen upgrades cost?

$45.97 at Scryfall market prices for default printings on 10 September 2026. The five lands are $29.70 of that. The six cards carrying most of the argument, Body Double, Gossip's Talent, Snarling Gorehound, Umbral Collar Zealot, Twilight Diviner and Matoya, Archon Elder, come to $3.95 together.

Is Revenant Recon worth playing out of the box?

Yes, and it is one of the better Murders at Karlov Manor decks to sleeve up unchanged, because the surveil engine works at any power level and the commander does something every turn for free. What the box gets wrong is the ratio. It spends its expensive slots on power 6 creatures that need six surveil triggers before Mirko can reach them, and its cheap slots on one-shot spells. Both halves are fixable for under $50.