Guide
Union Arena hides serial numbered cards in its boosters, 100 copies of each. They come in two kinds: serial versions of a Super Rare 3-Star card in the earlier sets, and serial Action Point cards from SOLO LEVELING onward. HoloHoard catalogues every one as its own serialised card, separate from its non-serial twin, and keeps a community tracker for each set.
7,082 cards across 82 sets, catalogued and ready to track.
Up to and including KAGURABACHI, the serial in a set is a numbered version of one of its Super Rare 3-Star (SR★★★) cards, such as Yuji Itadori in Jujutsu Kaisen or Sukuna in Jujutsu Kaisen Vol.2. From SOLO LEVELING onward, the serials are Action Point cards instead, and a set can carry several of them. Both kinds are numbered to 100.
A serial SR★★★ carries the same rarity and the same card number as the ordinary SR★★★ it is based on, so look for the serial: the numbered version has its own number out of 100 printed on it. HoloHoard keeps the two apart. The serial sits on its own Serial Numbered variant with a print run of 100, so it never merges with its twin in your collection, your lists or the set's completion.
Here is every set with serial numbered cards in the HoloHoard catalogue, newest first. Each set name opens that set's serial tracker. Open the Union Arena trackers.
| Set | Serial kind | Serial cards |
|---|---|---|
| Attack on Titan Vol. 2 | Action Point | 4 |
| Re:ZERO -Starting Life in Another World- | Action Point | 2 |
| Inuyasha | Action Point | 2 |
| CHAINSAW MAN | Action Point | 3 |
| The 100 Girlfriends Who Really, Really, Really, Really, REALLY Love You | Action Point | 6 |
| That Time I Got Reincarnated as a Slime | Action Point | 2 |
| SAKAMOTO DAYS | Action Point | 1 |
| Tokyo Ghoul | Action Point | 2 |
| SOLO LEVELING | Action Point | 2 |
| KAGURABACHI | SR★★★ | 1 |
| Evangelion: New Theatrical Edition | SR★★★ | 1 |
| Demon Slayer: Kimetsu no Yaiba Vol.2 | SR★★★ | 1 |
| Kaiju No. 8 | SR★★★ | 1 |
| CODE GEASS: Lelouch of the Rebellion Vol.2 | SR★★★ | 1 |
| Jujutsu Kaisen Vol.2 | SR★★★ | 1 |
| Demon Slayer: Kimetsu no Yaiba | SR★★★ | 1 |
| CODE GEASS: Lelouch of the Rebellion | SR★★★ | 1 |
| Jujutsu Kaisen | SR★★★ | 1 |
Each set's tracker lists its serial cards and every number the community has found so far, posted with a photo of the serial or spotted on a marketplace. Browsing is free, with no account needed. If you pull one, add it to your collection with its serial number and post it as a pull with a photo of the front and the back: it lands on the tracker, other collectors can hype it, and the HoloHoard team can verify it from your photos.
With 100 copies of each, every serial sale is close to one of a kind: the price history is thin by nature, and each new sale moves it. HoloHoard tracks their sales and live listings, shows a daily value estimate on each card page, and totals your collection from the same numbers. Read the Union Arena collector's guide.
100. Every Union Arena serial card, whether an SR★★★ serial or an Action Point serial, is numbered out of 100.
In the earlier sets, up to KAGURABACHI, a serial version of one Super Rare 3-Star card per set. From SOLO LEVELING onward, Action Point cards, sometimes several per set. HoloHoard lists every one by set, with a tracker for each.
They share the rarity and the card number, so look for the serial: the numbered version carries its own number out of 100. On HoloHoard the serial is a separate Serial Numbered variant, so the two never mix in your collection.
Yes. HoloHoard keeps a free community tracker for every Union Arena set with serial cards, showing which numbers collectors have posted or spotted so far. No account is needed to browse it.
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