Union Arena · UE20BT: That Time I Got Reincarnated as a Slime · #UE20BT/TSK-1-108 · Common
Sealed Cave
Union Arena card price for Sealed Cave: $0.13 market, from $0.03 at the cheapest listing, Normal printing, updated Oct 19, 2026. Full price history since Jun 28, 2026 below.
Sellers right now
Market price is what a near-mint copy actually sold for. The cheapest listing is what a seller asks today — on thin markets the two differ a lot.
Where to buy
One year
Price story
Sealed Cave came out in June 2026; we leave the first weeks out of this story, because early prices are set before real supply exists. Listings currently start at $0.03; over the last 30 days the market price averaged $0.14.
Printings
The card in play
- Card type
- Site
- Series Name
- That Time I Got Reincarnated as a Slime
- Required Energy
- 2
- Action Point Cost
- 1
- Generated Energy
- B
- Activation Energy
- Blue
[[When Played]] Look at the top six cards of your deck. Reveal up to one character card with 4000 or more BP and place it face down under this site. Place the remaining cards on the bottom of your deck in any order.
[[Activate: Main]] ((Switch to Resting)) ((Sideline This Card)) Add the cards under this site to your hand.
[Get] Add this card to your hand.
