Tyranid Swarm was designed as a Temur monster deck capable of pouring enormous amounts of mana into increasingly dangerous Tyranids. The Swarmlord leads the stock list and supports its +1/+1 counter theme well, but the secondary commander hiding in the same box offers a much more explosive direction.
Magus Lucea Kane costs and begins as a modest 1/1, yet her abilities provide exactly what a deck full of X spells wants. At the beginning of combat on your turn, she puts a +1/+1 counter on target creature. More importantly, she can tap to add cc. After doing so, the next spell you cast with in its mana cost or ability you activate with in its activation cost that turn is copied.
That means Lucea does three jobs simultaneously: she ramps, converts one enormous X spell into two and still supports the +1/+1 counter synergies already present in Tyranid Swarm. The best upgrade therefore does not need to abandon the Tyranids. It needs to concentrate the deck around X costs, generate enough mana to make those X values enormous and make every Lucea activation worth considerably more than two mana.
The Stock Deck Is Already Built for X-Spells
Tyranid Swarm contains far more Lucea synergy than its face commander suggests. Zoanthrope, Mawloc, Sporocyst, Termagant Swarm, Hormagaunt Horde, Ravener and Aberrant all give you scalable creatures that remain relevant whether they are cast relatively early or after the deck has accumulated ten or more mana.
The Ravenous mechanic makes those creatures particularly attractive. A creature with Ravenous enters with X +1/+1 counters, and if X was 5 or greater, its controller draws a card when it enters. Paying more mana therefore does not merely produce a larger Tyranid. Once X reaches five, the creature begins replacing itself as well.
Several stock creatures add another payoff on top. Zoanthrope deals X damage to any target when it enters, while Mawloc can immediately fight an opposing creature. Termagant Swarm converts its power into 1/1 Tyranid tokens when it dies, and Sporocyst can produce additional Tyranid bodies over time.
Lucea makes those already-scalable spells substantially more dangerous. Tap her before casting an X creature and you receive another copy of the creature spell with the same chosen value of X. The copy is created directly on the stack, but when it resolves it becomes another creature permanent. One large investment can therefore generate two enormous bodies and two sets of relevant enters-the-battlefield abilities.
The stock deck already provides the raw biomass. The upgrade needs to make sure we can afford to grow it.
Best Tyranid Swarm Upgrades
Unbound Flourishing is probably the cleanest upgrade possible. Whenever you cast a permanent spell with in its mana cost, it doubles the value of X. That is exactly what most of the deck’s Ravenous creatures are. A Zoanthrope cast with X=5 effectively becomes an X=10 creature without asking you to spend another five mana.
Combine that with Lucea and things become absurd. Lucea can copy the X-creature spell while Unbound Flourishing doubles the value of X. Instead of paying for one large Tyranid, you can end up with two creatures carrying the dramatically increased X value. Importantly, Unbound Flourishing does not itself create another copy of an X permanent spell; it doubles X. Lucea is the effect producing the extra creature.
Hydroid Krasis is one of the best non-Tyranid X creatures available because its value begins before it ever resolves. When you cast it, you gain half X life and draw half X cards, rounded down. Lucea then copies the creature spell, giving you two large flying, trampling bodies. The copy was not cast, so it does not create another Krasis cast trigger, but the original spell can already refill your hand while the pair of creatures provides a huge battlefield swing.
Goldvein Hydra gives the deck another scalable threat while solving an important problem for big-mana strategies: recovering after an expensive creature dies. It has vigilance, trample and haste, enters with X +1/+1 counters and creates Treasure tokens equal to its power when it dies. Lucea can turn one X investment into two Hydras, forcing opponents to choose between taking enormous combat damage and potentially giving you a pile of mana when they answer the creatures.
Kiora, Behemoth Beckoner provides two forms of support for only three mana. Her static ability draws a card whenever a creature with power 4 or greater enters under your control, which happens constantly in this deck. Her -1 ability can also untap Magus Lucea Kane, allowing Lucea to activate again and place an additional copy trigger onto the next qualifying X spell you cast that turn.
Finally, Elementalist’s Palette is almost purpose-built for this strategy. It enters with an oil counter, gains another whenever you cast a spell with in its mana cost and can tap to produce c for each oil counter on it, with that mana restricted to X costs. Early in the game it helps develop your mana; after several X spells it becomes a substantial engine capable of feeding increasingly ridiculous values into the next Tyranid.
These additions solve the actual bottleneck of the deck. Tyranid Swarm already contains scalable monsters. What it needs is more mana and more ways to multiply what that mana buys.
What Should You Cut?
Moving Magus Lucea Kane into the command zone makes several cards from the stock list much less necessary. The Swarmlord is an obvious first cut. It can become enormous after repeated commander casts when leading the deck, but from the 99 it loses that scaling mechanism and becomes a six-mana creature whose card-draw ability supports a broader +1/+1 counter strategy rather than the X-spell engine we are building.
Ghyrson Starn, Kelermorph belongs in a very different deck. His ability rewards sources dealing exactly 1 damage to permanents or players. Lucea is trying to create enormous X creatures and giant damage effects, so Ghyrson has very little overlap with the upgraded strategy.
Goliath Truck is another easy trim. The Vehicle can provide power and trample, but it requires creatures to crew it and contributes nothing to X spells, Ravenous or the mana engine. The upgraded list should already have creatures large enough to make an additional combat Vehicle unnecessary.
Deathleaper, Terror Weapon is a powerful aggressive creature, but its haste-focused ability is not especially important once the deck moves toward scalable X threats. It remains perfectly playable if maintaining Warhammer flavor is a priority, but mechanically it is one of the Tyranids I would sacrifice before cutting an X creature.
Finally, Icon of Ancestry becomes less attractive as the deck moves away from strict Tyranid tribal. The anthem is modest, and the creature-selection ability becomes less reliable once cards such as Hydras, planeswalkers and dedicated X-spell engines begin entering the list.
A clean first round of upgrades would therefore be:
Out: The Swarmlord, Ghyrson Starn, Kelermorph, Goliath Truck, Deathleaper, Terror Weapon, Icon of Ancestry
In: Unbound Flourishing, Hydroid Krasis, Goldvein Hydra, Kiora, Behemoth Beckoner, Elementalist’s Palette
The result remains recognizably Tyranid Swarm, but almost every expensive play now contributes directly to Lucea’s central engine.
Ravenous Rewards X=5, but Bigger Is Not Always Better
The defining Tyranid mechanic creates an important decision every time you cast one of the deck’s X creatures. Ravenous causes the creature to enter with X +1/+1 counters and draws you a card if X is 5 or greater.
That makes X=5 an important breakpoint.
Casting Hormagaunt Horde with X=4 gives you a large creature but no Ravenous card. Spending one additional mana gives it another counter and replaces the card you just cast. In a vacuum, reaching five is therefore usually worth the extra mana.
But Tyranid Swarm should not blindly put every available mana into a single spell. Ravenous was specifically designed so that reaching five provides a reward without requiring you to spend absolutely everything. Once you have enough mana, casting two X=5 Tyranids can often be better than casting one X=10 creature, especially when both replace themselves.
Lucea changes that calculation even further because her copy effectively multiplies one spell without requiring you to pay its full cost twice. The ideal turn is often not “make X as large as mathematically possible.” It is “reach the important X threshold while leaving enough resources to continue developing the board or protect the creatures you just created.”
Huge X values are fun.
Efficient huge X values win more games.
Lucea Copies the Spell, Not the Mana You Spent
Magus Lucea Kane has one of those abilities that becomes easier to understand once you separate its two effects.
First, tapping Lucea adds cc.
Second, it creates a delayed triggered ability. The next time you cast a spell with in its mana cost or activate an ability with in its activation cost that turn, Lucea copies that spell or ability.
The two colorless mana do not determine X. They are simply two additional mana you can put toward the spell. If you have eight other available mana and Lucea provides two more, you may be able to choose X=8 on a creature costing , and the resulting spell is then copied with X still equal to eight.
You do not pay for the copy.
That is where the mana advantage becomes enormous. If the original spell represents ten mana of value, Lucea is effectively creating another ten-mana object on the stack after contributing two mana toward the first one.
The copy also is not cast. That distinction matters for cards with cast triggers such as Hydroid Krasis. The original Krasis produces its life-gain and card-draw trigger because you cast it, while the copy does not produce another cast trigger. Both creature spells can still resolve into large creatures.
Understanding that difference prevents the deck from overestimating certain interactions while still revealing just how powerful Lucea actually is.
Untapping Lucea Can Stack Multiple Copy Triggers
Because Lucea’s Psychic Stimulus creates a delayed trigger rather than immediately choosing an X spell, untapping her before casting that spell can produce spectacular results.
Suppose you activate Lucea once, adding cc. Then Kiora, Behemoth Beckoner untaps her. Activate Lucea again and you now have another cc as well as two delayed copy triggers waiting for your next appropriate X spell.
Cast one Ravenous Tyranid and both Lucea triggers can copy it.
Instead of one creature, you receive the original plus two spell copies.
This is why untap effects can be valuable without needing an infinite combo. One extra Lucea activation effectively adds another complete copy of whatever enormous spell you were already planning to cast.
There is an important correction to the old version of this guide, however. Freed from the Real does not create infinite mana with Lucea by itself. Lucea produces cc, while Freed requires to untap the enchanted creature. Colorless mana cannot pay a blue mana requirement, so the pair needs another source capable of repeatedly supplying blue before it can form any kind of loop.
The deck does not need a questionable infinite combo anyway. Copying a ten-mana Tyranid two or three times is generally dramatic enough.
Unbound Flourishing and Lucea Do Different Things
Unbound Flourishing looks similar to Lucea because both cards make X spells much larger, but their actual mechanics are different.
For permanent spells with in their mana costs, Unbound Flourishing doubles the value of X. If you cast an X creature with X=5, the enchantment can turn that value into ten. You do not pay an additional five mana.
Lucea instead copies the spell.
With both effects available, one X creature can therefore become two creatures with a greatly increased value of X. That is much stronger than simply receiving one extra ordinary copy.
This distinction becomes especially important with Ravenous. Because the doubled X easily crosses the X=5 threshold, the original permanent and its copied version enter with enormous piles of +1/+1 counters. Each Ravenous permanent that resolves can also satisfy its own draw condition based on the value of X associated with it.
For instants and sorceries, Unbound Flourishing works differently again: instead of doubling X, it copies the spell. That makes cards such as Crackle with Power or Drown in Dreams potential late-game finishers when both Lucea and Flourishing are involved.
The old version of this guide described the combination as creating three copies of a Ravenous creature. That is not what happens.
It is arguably better: Lucea gives you the additional creature while Unbound Flourishing makes the X value enormous.
Zoanthrope Is One of the Best Cards Already in the Deck
If there is one stock Tyranid I would almost never remove from a Lucea build, it is Zoanthrope.
For , it has Ravenous, flying and ward . When it enters, it also deals X damage to any target. That means almost every part of the card scales with the same mana investment.
With X=5, it enters as a 5/5, Ravenous draws a card and Warp Blast deals 5 damage. Activate Lucea before casting it and the spell is copied, producing another Zoanthrope with the same X value after the copy resolves. Each resulting creature has its own enters-the-battlefield ability.
The legend rule is irrelevant because Zoanthrope is not legendary. Both remain on the battlefield.
At higher values of X, this becomes a genuine finishing sequence. You are creating large evasive creatures, drawing through Ravenous and throwing direct damage around the table without needing those creatures to survive until combat.
That combination of scalability, interaction and card advantage is exactly what every addition to a Lucea deck should aspire to.
The Deck Needs Mana More Than More Finishers
Tyranid Swarm already has plenty of ways to spend ten mana. The challenge is consistently producing ten mana.
Fortunately, the stock deck understands this. Sol Ring, Arcane Signet, Cultivate, Farseek, Rampant Growth, Harrow, New Horizons and Overgrowth give the list a much larger ramp package than an ordinary creature deck.
Nexos deserves special protection as well. It can make a basic land produce two colorless mana when that mana is spent on costs containing X, making it exactly the kind of specialized acceleration Lucea wants. The larger your X costs become, the less painful it is that the extra mana is restricted.
Elementalist’s Palette extends the same idea across multiple turns. Every X spell makes later X spells easier to cast, which is much more valuable than adding another seven-mana creature to a deck already overflowing with threats.
There is a temptation to replace the stock ramp with flashier X cards. Resist it.
Every extra mana source eventually becomes another +1/+1 counter, another point of Zoanthrope damage or another resource multiplied by Lucea.
In this deck, ramp is part of the win condition.
+1/+1 Counters Still Matter
Moving away from The Swarmlord does not mean abandoning the counter package. Ravenous naturally fills creatures with +1/+1 counters, so many of the best stock support cards remain excellent.
Hardened Scales adds another counter whenever one or more +1/+1 counters would be placed on a creature you control. Across several Ravenous creatures, that represents a substantial amount of additional power for only one mana.
Inspiring Call is even more important. It draws a card for each creature you control with a +1/+1 counter and gives those creatures indestructible until end of turn. Because most Ravenous creatures naturally qualify, one instant can protect the battlefield from a destroy-based sweeper while refilling your hand.
The stock The First Tyrannic War also deserves consideration. Its first chapter can put a creature from your hand directly onto the battlefield, and if that creature’s mana cost contains , it receives +1/+1 counters based on the number of lands you control. Later chapters double counters on a creature.
There is an important limitation: putting an X creature directly onto the battlefield is not casting an X spell, so Lucea does not copy it. That does not make the Saga bad; it simply means it belongs to the counters side of the deck rather than the spell-copying engine.
The best upgraded list keeps these overlapping themes where they support each other rather than pretending one has to disappear completely.
The Mana Base Should Support Lucea on Turn Four
Tyranid Swarm contains 39 lands and a substantial amount of ramp, which is appropriate for a deck with such a demanding top end. Command Tower, Exotic Orchard, Cinder Glade and Game Trail provide useful fixing, while Frontier Bivouac gives access to all three Temur colors at the cost of entering tapped.
The weakest part of the mana base is how many additional lands also enter tapped. Rugged Highlands, Thornwood Falls, Temple of Abandon, Temple of Epiphany, Temple of Mystery, Evolving Wilds and Terramorphic Expanse are reasonable budget options, but drawing several together can delay Lucea or prevent the deck from using all of its mana on a critical X-spell turn.
I would improve those lands gradually rather than reducing the overall land count aggressively. This is one of the rare Commander decks where drawing additional lands deep into the game is often welcome because every mana can simply be poured into X.
The real goal is straightforward: establish reliably enough to cast Lucea and still develop enough mana that her first copied X spell matters.
Our Mana Base Upgrade Guide is useful here, but there is no reason to turn this into an expensive three-color mana base overnight. Faster lands help; maintaining a high total supply of mana matters even more.
How the Upgraded Tyranid Swarm Deck Wins
The early game should look like a ramp deck. Deploy Sol Ring, Arcane Signet or land-based acceleration and resist the temptation to dump mediocre X creatures onto the battlefield merely because you can. The difference between an X=2 Tyranid and an X=5 Ravenous Tyranid is enormous.
Once Magus Lucea Kane enters, every future X spell carries the threat of becoming two. Untap with Lucea, activate her before the important spell and use the extra cc toward a large Zoanthrope, Mawloc, Sporocyst or another scalable threat.
Cards such as Kiora, Behemoth Beckoner and Elementalist’s Palette then turn the engine from large into absurd. Kiora can untap Lucea for another activation while rewarding large creatures with additional cards. Palette stores the history of your X spells as progressively larger bursts of mana.
Unbound Flourishing represents the next stage. Now your X creatures can receive doubled X values before Lucea’s spell copy resolves, producing enormous bodies for a fraction of the mana their final stats would normally require. Hydroid Krasis can refill your hand, while Goldvein Hydra provides immediate combat pressure and refunds resources when it dies.
Eventually the deck wins in one of two ways. The straightforward route is combat: several enormous creatures with evasion or trample quickly overwhelm ordinary Commander boards. The second route converts X directly into damage through cards such as Zoanthrope or an optional finisher such as Crackle with Power.
The important part is that you rarely have to choose between building a threat and generating value.
With Lucea active, one X spell is frequently doing both jobs twice.
PreconForge Verdict
Tyranid Swarm is one of those precons where the alternate commander reveals an entirely different ceiling without requiring you to throw away what made the original deck interesting. Magus Lucea Kane still wants the huge Tyranids, the +1/+1 counters and the enormous mana production. She simply gives all of those pieces a much clearer purpose.
The stock deck already provides Zoanthrope, Mawloc, Sporocyst, Termagant Swarm, Hormagaunt Horde, Hardened Scales, Inspiring Call, Nexos and a deep ramp package. That is an excellent foundation.
The biggest mistake would be replacing all of that with a pile of unrelated Hydras simply because they have X in their mana costs.
Keep the strongest Tyranids.
Then improve what happens when you cast them.
Unbound Flourishing makes X dramatically larger, Kiora, Behemoth Beckoner gives Lucea another activation, Elementalist’s Palette converts previous X spells into future mana, and Hydroid Krasis plus Goldvein Hydra provide additional scalable threats that remain useful at almost every stage of the game.
That leaves Tyranid Swarm with a beautifully simple objective:
Make more mana. Put it into X. Then make the same spell happen again.
Once Lucea begins copying Ravenous creatures with X values of five, eight or ten, the Hive Fleet stops looking like a collection of oversized creatures and starts behaving exactly as its name promises — a swarm where every piece of biomass can suddenly become twice as large and twice as numerous as the table expected.
