Precon Upgrade Guide
What to cut, what to add, and how to play the Simic token-doubling precon from Commander 2021, commanded by Adrix and Nev, Twincasters.

Commander 2021
Quantum Quandrix
Double your tokens, the most reprinted-into-other-decks of the five. Out of the box, before any upgrades. How we rate precons
Buy Quantum Quandrix on TCGplayer →Quantum Quandrix is one of the easier precons to make strong, because its commander doubles every token you make and the deck already has plenty of token makers. With Adrix and Nev, Twincasters out, Hornet Queen brings eight Insects and Rite of Replication kicked makes ten copies. Its weak spots are a few cards that don't make tokens at all, little protection for a wide board against a wipe, and a mana base with too many tapped lands.
TurnZero HQ rates Quantum Quandrix a 2 out of 5 on difficulty and a 4 out of 5 on power, as it comes in the box. That is our editorial read, not an official Wizards rating. The full hundred cards are on the Quantum Quandrix decklist page, and every other precon we cover is on the precon directory.
Adrix and Nev, Twincasters is a four-mana 2/2 with ward {2} and one static ability: if one or more tokens would be created under your control, twice that many are created instead. That applies to every kind of token, so Fractals, Beasts, Insects and copies of your creatures all double.
The rest of the deck supplies tokens to double. Kazandu Tuskcaller makes Elephants every turn once leveled, Rampaging Baloths makes a Beast on every land drop, and Biomathematician and Deekah, Fractal Theorist make Fractals. Copy spells like Rite of Replication and Spitting Image turn your best creature into two or more.
The deck draws off its board size. Shamanic Revelation draws a card for each creature you control, Idol of Oblivion draws whenever you made a token that turn, and Garruk, Primal Hunter draws cards equal to your biggest creature's power. Guardian Augmenter gives Adrix and Nev hexproof and +2/+2 so it sticks around.
Adrix and Nev, Twincasters ↗
Doubles every token you create. Every token maker in the deck makes twice as much while it is out.
Hornet Queen ↗
Seven mana for eight flying, deathtouch Insects with Adrix and Nev out. It blocks almost anything and attacks in the air.
Rite of Replication ↗
Kicked, it makes ten copies of a creature with Adrix and Nev out. Copying Hornet Queen or Rampaging Baloths usually ends the game.
Kazandu Tuskcaller ↗
A two-mana creature that makes 3/3 Elephants every turn once leveled. Doubled, that is two or four Elephants a turn.
Rampaging Baloths ↗
Each land drop makes a 4/4 Beast, or two with Adrix and Nev out.
Shamanic Revelation ↗
Draws a card for each creature you control. After a few token turns, it refills your hand completely.
A few cards don't support the token plan. Spawning Kraken only makes tokens when a Kraken, Leviathan, Octopus or Serpent deals combat damage, and it is nearly the only one in the deck. Arashi, the Sky Asunder hurts flying creatures, including your own Insects. Theoretical Duplication only does something if an opponent casts a creature that turn.
The deck's whole plan is a wide board, and it has almost nothing to protect that board from a wipe or to stop a game-winning spell. The mana base also has a lot of tapped lands: Tranquil Thicket , Lonely Sandbar , Mosswort Bridge , Llanowar Reborn and several more.
Each upgrade below starts from something the deck does poorly and says what a replacement card has to do. The cards named are examples, not the only answer: if you own something else that does the same job, or a newer printing does it better, it goes in the same slot. Make one change at a time and play a few games between them, so you can tell which change helped. The general method is in how to upgrade a Commander precon →
Adrix and Nev doubles every token, so the best cards in the deck are ones that make tokens every turn rather than once. Cheap ones get going before the first board wipe.
What to look for Creatures or enchantments costing five mana or less that make a token every turn, every land drop, or every upkeep.
Cut, for example
Spawning Kraken A six-mana 6/6 that makes a 9/9 only when a Kraken, Leviathan, Octopus or Serpent deals combat damage to a player. Apart from itself and Reef Worm's last token, the deck has none, so it has to connect on its own.
Arashi, the Sky Asunder Deals damage to fliers. Its channel ability kills your own flying Insects as easily as an opponent's fliers.
Theoretical Duplication Only copies a creature an opponent puts onto the battlefield this turn. Too situational for a slot.
Add, for example
Tendershoot Dryad ↗
Makes a Saproling at the beginning of every player's upkeep, two with Adrix and Nev. Once you control ten permanents, the Saprolings become 3/3s.
Scute Swarm ↗
Three mana: every land drop makes an Insect, and with six lands it copies itself instead. Doubled, it grows very quickly.
Tireless Provisioner ↗
Every land drop makes a Treasure or Food, two with Adrix and Nev. Doubled Treasures are a lot of ramp.
A board of thirty tokens is the deck's whole investment. One board wipe resets it, and the deck currently has no way to stop or survive one.
What to look for Cheap instants that counter a sorcery or give your permanents indestructible. Two mana or less lets you hold one up while still building.
Cut, for example
Kaseto, Orochi Archmage Makes a creature unblockable for two mana and pumps Snakes. The deck has only two other Snakes, and it already wins by going wide.
Crafty Cutpurse Steals tokens an opponent would create this turn. It needs an opponent to make tokens while you hold mana open, which rarely lines up.
Add, for example
Heroic Intervention ↗
Two mana at instant speed: your permanents gain hexproof and indestructible. It stops most board wipes.
Counterspell ↗
Two mana to counter any spell, including a board wipe or a combo piece.
Swan Song ↗
One mana to counter an instant, sorcery or enchantment. The caster gets a 2/2 Bird, which is a small price for stopping a wipe.
The deck makes a lot of bodies but has only Biomass Mutation and Return of the Wildspeaker to turn them into a lethal attack. More team pumps close games faster.
What to look for Cards that give every creature you control a large boost or trample, or that double your tokens again.
Cut, for example
Desolation Twin Ten mana for a 10/10 and a 10/10 token, or two tokens with Adrix and Nev out. Strong if you can cast it, but the deck rarely gets there before the game is decided.
Geometric Nexus Gathers counters from instants and sorceries, then costs six to cash in. Slow for a deck that wins through creatures.
Add, for example
Overwhelming Stampede ↗
Your creatures get +X/+X and trample, where X is the greatest power among them. With a 10/10 or a big Fractal out, the whole team becomes lethal.
Beastmaster Ascension ↗
Three mana: with seven quest counters, your creatures get +5/+5. A wide token board fills it in one attack.
Parallel Lives ↗
Doubles tokens again. With Adrix and Nev out too, every token maker makes four times as many.
The deck plays several lands that enter tapped and makes plenty of plays at three and four mana. Untapped duals help it cast Adrix and Nev on time.
What to look for Lands that tap for green or blue and usually enter untapped. See the land and mana base guide for more.
Cut, for example
Tranquil Thicket Enters tapped and makes only green. Cycling is fine late but rarely worth the lost tempo early.
Lonely Sandbar Enters tapped and makes only blue, with the same tradeoff.
Temple of the False God Makes no mana until you control five lands.
Add, for example
Hinterland Harbor ↗
Taps for green or blue and enters untapped if you control a Forest or an Island.
Vineglimmer Snarl ↗
Taps for green or blue and enters untapped if you reveal a Forest or Island from your hand.
Botanical Sanctum ↗
Taps for green or blue and enters untapped in your first three land drops.
The upgraded deck wins by attacking with more tokens than the table can block. Adrix and Nev, Twincasters doubles every Elephant, Beast and Insect, Rite of Replication or Spitting Image copies your best creature, and Overwhelming Stampede or Beastmaster Ascension turns the board into lethal damage. Hornet Queen doubled is often enough to hold off opponents while you build.
A good first Commander deck for a player who likes big boards and simple effects. Adrix and Nev's ability is easy to follow, and the deck rewards playing token makers and attacking. The board can get large, so expect to track a lot of tokens, but the decisions themselves are straightforward.
Checked against the printed decklist on October 10, 2026.
TurnZero HQ keeps a win rate per deck version, so you can change a few cards, play some games, and see the difference instead of guessing.
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