- tcgrate
- Games
- Union Arena
- Sets
- UE10BT: Attack on Titan
- Key to the Basement
Union Arena · UE10BT: Attack on Titan · #UE10BT/AOT-1-098 · Uncommon
Key to the Basement
Union Arena card price for Key to the Basement: $0.20 market, from $0.09 at the cheapest listing, Normal printing, updated Oct 20, 2026. Full price history since Aug 29, 2025 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
Key to the Basement was released in August 2025. Launch-week prices are left out here: before supply arrives they are mostly guesses. Across the past year it went +25.0%, with a low of $0.10 and a high of $0.21; today it sits near the top of that range. The cheapest listing right now is $0.09, and the 30-day average market price is $0.18.
Printings
The card in play
- Card type
- Event
- Series Name
- Attack on Titan
- Required Energy
- 2
- Action Point Cost
- 1
- Activation Energy
- Red
Look at the top five cards of your deck. Reveal up to one "Basement" or "Inheritor of the Titan" affinity card among them and add it to your hand. Place the remaining cards on the bottom of your deck in any order. If the revealed card has 6 or more base required energy, choose up to one of your AP cards and switch it to active.
[Color] Choose one character with 2500 or less BP on your opponent's front line and sideline it.
