The Best UNION ARENA TCG Decks Right Now (2025)
Looking for the best UNION ARENA deck to take with you to your next store tournament and get your favorite winner card? I’ve compiled a list of the most meta relevant decks right now, starting with the current best decks in the format.
UNION ARENA currently boasts a surprisingly wide array of competitive decks. That being said, thanks to the releases of both Attack on Titan and Code Geass Vol. 2, the UNION ARENA meta has had yet another profound shakeup. While many of the decks below should look familiar, bold new strategies have entered the arena, threatening to wreck havoc in their wake.
We’ll get into all of these decks and more below in the current UNION ARENA meta rundown.
#1 Code Geass Lancelot is the UNION ARENA meta king
1st of 16 at Midgard Gaming Weekly by Crius
Code Geass Lancelot was once a mainstay in the UNION ARENA meta, and was so for a long time. As of late, its performance has been lacking. However, with the release of Code Geass Vol. 2, it’s once again on top.
If you’re wondering what to do to upgrade your existing Lancelot deck, you might be glad to know it isn’t missing much. The primary big addition to the deck is the two-cost Nunnally. While innocent seeming at first, this Nunnally makes it far easier to hit your high energy curve, meaning you can get those Lancelot Air Cavalry out to dominate the field much more easily.
While I expect builds for this deck to very greatly from player to player, I do like the inclusion of Cornelia’s Gloucester, making it relatively easy to find that Nunnally from the top five cards in your deck and play her safely to the energy line.
Learn more about how to pilot the powerful Lancelot deck in this guide.
#2 Squad Zero/Ichigo Hybrid
Purple Ichigo Vol 2. Anto – 4th place at Haven Summer Showdown: 36 players
Bandai feared the power of Purple BLEACH so much that they decided to cut the zero cost Rukia from its lineup altogether. The result? Players have shyed away from the pure Ichigo/Rukia build and are doing something different instead – combining the powerful five-cost Ichigo and its raid targets with Squad Zero. It’s a deck that excels at unlocking tons of card draw while simultaneously enabling powerful removal.
Essentially, this is more of a Squad Zero deck than an Ichigo one – leveraging solid removal via Senjumaru, and eventually buffing up to play Purple BLEACH’s new and most deadly card: four-cost Ichigo with Nullify Impact, Damage 2, and Impact.
Another of this decks’ key cards is its “Special”: one that lets you remove any character on the field with relative ease, fuel your removal area to unlock those powerful effects, and even draw more cards to replace the ones your remove from hand. Finally, we have to talk about the Royal Palace site – a card that is pretty broken and unmatched in its ability to let you draw a card each turn (assuming a Squad Zero character is on top of your deck).
While there are many different ways to build Purple BLEACH, this Squad Zero/Ichigo deck has planted a farily firm stake in the claim for best deck in the format.
#3 Roy Mustang
Somethingfresh’s1st place Roy Mustang deck – Gen Con UNION ARENA Regionals –
One of anime’s most beloved heroes gets a deck of his own in the Fullmetal Alchemist Blue Roy Mustang deck. This deck is all about using a combo of effects to lower your opponent’s characters down to size, putting them within striking distance of Roy Mustang’s powerful “When Attacking” removal effect. That’s not all this deck has to offer, however. It also boasts one of the stronger draw engines among the top tier decks, and a highly handy Edward Elric card capable of coming in active and complete with Impact.
Edward Elric
After over performing at UNION ARENA’s first regional for the English version of the game, it’s clear that Roy Mustang isn’t only the strongest Fullmetal Alchemist deck – it’s one of the strongest in the game right now.
Learn more about the Blue Mustang deck that dominated UNION ARENA’s first regional.
#4 Sukuna/Nanami Blue JJK
Deck by Jwade3036 1st of 8
Perhaps because of an anticipated limitation to starter deck Sukuna that never came, many assumed pure Blue Sukuna without Nanami would be the dominant deck post JJK Vol. 2. However, no Sukuna limitation was released, leaving players to build freely. The result? Nanami/Sukuna is doing very, very well at tournaments, regularly showing up in the top spot.
And it makes sense: Blue Nanami/Sukuna feels like a Blue JJK greatest hits album, letting you mix-and-match this energy color’s strongest cards into a single, cohesive deck. It doesn’t hurt that Nanami also gained a ton from JJK Vol. 2, making it much easier to hit your end of game condition that sees his Raid boost dramatically in power.
Will Nanami/Sukuna be the defining JJK build once the dust has settled? It’s too early to know for sure. With plenty of regionals coming up we’ll likely soon have a stronger idea of where the meta is at. But for now, it’s off to a very impressive start.
#5 Yellow Saitama
Corey Encinas – 2nd Place Egman Quad SAO Box Tournament
One Punch Man is a unique set in the UNION ARENA lineup as it is the first set to get a simultaneous release between the English version and Japan. Although most of the decks in that set revolve around the 1.5/2 tiers, Yellow Saitama feels like something in a league of its own.
Saitama is the first character to enter the game with over 5000 BP. Additionally, he can’t be removed from abilities, which means you can’t get rid of him with your specials from your hand or even from life.
Saitama
As if that weren’t enough, he’s a powerful attacker in his own right with the potential of reaching Impact 1 and Damage 2 in the same card, assuming you are able to discard a Saitama from your hand.
While Yellow Saitama had an initial outsized impact on the meta – warping the way the game was played in order to deal with it – that impact has largely died down as players adapted to deal better with an anti-removal deck. Still, it’s prowess remains relevant in an ever-shifting meta, and will likely continue to pull out wins as decks get greedier with their heavy reliance on outright removal as opposed to the finesse required to deal with this big guy.
Learn how to build and play the Yellow Saitama One Punch man deck.
#6 Blue Sukuna
Blue Sukuna has long been a powerhouse in the UNION ARENA meta, and for good reason. Its combination of power, draw, and versatility is unmatched by any other deck in the game. And while it was a top contender before its second volume hit the shelves, now it is more deadly than ever.
While several new cards have been added to this strategy in the second volume, the strongest is arguably seven-cost Sukuna. Assuming you manage to play this guy with four Sukuna’s Fingers in your sideline, you get access to a pretty insane number of effects, including drawing a card while forcing your opponent to discard one, reducing the BP of all opposing characters, and even sidelining one.
Additionally, three-cost Itadori with the Blue Color Trigger is a welcome enhancement to this deck’s build, giving it access to a much more handy Color Trigger than it’s had before, while five cost Itadori enables you to play these high energy characters without breaking a sweat. Combine that with the power of Malevolent Shrine, and the rest of the cards already available via JJK’s base set, and you have a much more control heavy build than what we’ve seen from pure Sukuna to date.
Learn how to play UNION ARENA’s strongest deck via my Blue Sukuna deck guide.
#7 Code Geass Purple
1st place Egman tournament by Shawn Brophy
When I first got my hands on Code Geass Purple I was blown away by its potential. This deck’s strongest card is the powerful Guren Mk-II which forces your opponent to block while also granting Impact. That combined with a plethora of powerful BP reduction cards creates one of the strongest decks in the format still topping local tournaments and larger events.
Today, however, Code Geass Purple’s title is contested by Purple BLEACH. Although Purple Code Geass until recently bested its rival to the throne for greatest purple deck in the game, it’s having more trouble keeping up with some of the new mechanics granted BLEACH in its second volume.
Still, there’s a lot going for this deck: Code Geass Purple is a fun to play, powerful, and has the tools it needs to stay meta relevant for a long time to come.
Not only is Code Geass a powerhouse, it’s got a strong matchup spread and ways to deal with just about every other meta-relevant deck. Going up against a Lancelot? No problem – drop that BP by 1000 via Gawain or two-cost Lelouch. Need to clear your opponent’s board? No problem: raid a Guren and force them to block.
Really the only drawback of this deck is the fact that you can easily exhaust your energy line if you aren’t careful because of how many five-cost raids you have and the fact that your Special is a two AP cost in hand.
Read my guide to Code Geass Purple for more info on this deck.
#8 Todo/Mechamaru deck
7th place deck by Div – Gen Con UNION ARENA Regional
Purple Todo feels like a deck with something of a cult following. Despite the fact that this strategy didn’t have the nuts and bolts that it needed first time around, it’s still one that showed up on the local scene with plenty of players hoping to Boogie Woogie their way to victory.
Now, that’s changed thanks to plenty of added support from Volume 2. Cards like Ultimate Mechamaru grant considerable versatility to this deck, while the primary technical advantage here still rests in Todo’s character swapping ability – the best of its kind in the game.
Lastly, Todo could be a very handy pick into the JJK Vol. 2 Rare Battle format thanks to the Mechamaru’s site demolishing capabilities, making it a reliable counter to Blue JJK’s broken Shrine play.
#9 Blue SAO Aincrad
12th place at the Draw 3! Grand Opening Tournament by Popito
For now, Blue SAO Aincrad has taken the top spot for strongest multi-attack deck in the meta. Filled to the absolute brim with powerful switching cards, deadly Double Attack, and plenty of Impact to make your head spin, Blue SAO Aincrad is a deck that can absolutely make your head spin if it gets its combos off.
The challenging part about it? It’s consistency – or lack thereof. Manage to shut down some of this deck’s key pieces early on and it’s hard for it to come back. That being said, it’s handily shoved the other decks focused on multi-attack as their core strategy out of the running for top UA deck – an impressive feat for a deck with virtually no removal outside of its Special.
Perfect your multi-attack strategy with my SAO Blue Aincrad deck list and guide.
#10 Attack on Titan Green
Although the Green Marleyan Warrior deck didn’t top my list of best Attack on Titan decks, I couldn’t help but like it for what it is when looking forward to the set. Today, it’s one of the most popular among the top tier Attack on Titan decks.
While this deck just has a lot going for it all around, I’m fairly sure the main reason players want to play it so bad is because of the Colossal Titan.
This guy has all the allure of similar hyper-high-end hyper-powered character cards like Green Saitama and others, only this time letting you sideline all zero-cost characters on the field while swinging for Impact 1 and Damage 3 at 6000 BP.
For now, Green AOT is the most popular deck from the set. But don’t count the others out yet: I could totally see Levi making an appearance on this list of top UNION ARENA decks once players figure out how to pilot him properly!
These are the strongest decks in the game right now you should know about, but stay tuned as I will keep updating this list with even more strategies you can use to compete at your next UA store tournament as more sets enter the arena!
