For English singles, TCGplayer has the widest selection: every Union Arena booster, extra booster, starter deck and promo set is in its catalog, usually listed before the street date. For sealed product, your local game store is the first stop.
Singles on TCGplayer
Each card page on this site shows the current TCGplayer market price, refreshed daily, with a link straight to the listing. Prices for every printing of a card (regular, star and parallel versions) are shown together, so you can pick the cheapest version that's legal for your deck.
Buy a whole deck at once
The deck builder totals the price of your list and sends all 50 cards to TCGplayer's Mass Entry in one click. It's the quickest way to buy a tournament deck: open any list from the decklists page in the builder, swap the cards you already own, then buy the rest.
Which printing should you buy?
Union Arena prints many cards in several rarities: a regular version plus star (★) and parallel versions with alternate art. They share the same card number, so for deck building they are the same card: the 4-copy limit counts all printings of a number together. If you're buying to play, the regular version does exactly the same thing for a fraction of the price.
Sealed product
- Starter decks come ready to play: a 50-card deck, 3 Action Point cards and a playsheet, with a US MSRP around $11.99. They're the best first purchase (see which starter to buy).
- Boosters each cover one anime title. Open them if you enjoy pulling, but buying singles is far cheaper for building a specific deck.
- Local game stores that run Union Arena events usually stock the newest boosters and starters, and buying there keeps your local scene alive.
English vs Japanese cards
Union Arena launched in Japan in early 2023 and the English version followed in autumn 2024 with its own release schedule, so the two card pools differ. English events use English cards; check your event's rules before bringing Japanese prints. Every card in this site's database is from the English catalog.
Tips before you buy
- Pick a title first. A deck uses one title only, so commit to one before buying singles across several.
- Check the current meta on the decklists page if you plan to play in tournaments.
- Commons and uncommons are cheap. Most of a deck's cost sits in a handful of Super Rares, so price those first.