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  6. Key to the Basement

Union Arena · UE10BT: Attack on Titan Release Event Cards · #UEPR/AOT-1-098 · Uncommon

Key to the Basement

Union Arena card price for Key to the Basement: $1.15 market, though the cheapest copy on sale asks $1.19, Normal printing, updated Oct 19, 2026. Full price history since Aug 30, 2025 below.

Market price · Normal · Oct 19, 2026
$1.15
+7.5% this week · +36.9% in 30 days
Buy on eBay →
1 day0.0%
7 days+7.5%
30 days+36.9%
90 days+17.4%
1 year−18.4%
All time−59.7%

Sellers right now

$1.19lowest listing$4.99highest
Market price$1.15
Mid listing$2.69
30-day avg$1.04

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

TCGplayer$1.15

One year

$0.8452-week low$1.4152-week high
In the range54%
All-time low$0.84
All-time high$2.85
First priceAug 30, 2025
Normal · market price
$0.72$1.50$2.27$3.05
$1.15
Aug 2025Jan 2026Jun 2026Oct 2026
TCGplayer market price · via tcgcsvtcgrate.com

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 −18.4%, with a low of $0.84 and a high of $1.41; today it sits in the middle of that range. The cheapest listing right now is $1.19, and the 30-day average market price is $1.04.

Printings

PrintingMarketLowHigh7d
Normal$1.15$1.19$4.99+7.5%

The card in play

Card type
Event
Series Name
Attack on Titan
Required Energy
2
Action Point Cost
1
Activation Energy
Red
Card text

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.

Trigger

[Color] Choose one character with 2500 or less BP on your opponent's front line and sideline it.

Other printings of Key to the Basement

1 more · $0.19 – $1.15
All printings
Key to the Basement (UE10BT/AOT-1-098), Attack on Titan — Union Arena card price +11.8% 7d Key to the Basement UE10BT: Attack on Titan · #UE10BT/AOT-1-098 $0.19

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