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  6. Underwater Tunnel // Slimy Aquarium

Magic · Duskmourn: House of Horror · #79 · Common

Underwater Tunnel // Slimy Aquarium

Magic card price for Underwater Tunnel // Slimy Aquarium: $0.23 market, from $0.01 at the cheapest listing, Foil printing, updated Oct 20, 2026. Full price history since Sep 15, 2024 below.

Market price · Foil · Oct 20, 2026
$0.23
+21.1% this week · +4.6% in 30 days
Buy on eBay →
1 day+4.6%
7 days+21.1%
30 days+4.6%
90 days−8.0%
1 year+283.3%
All time−80.5%

Sellers right now

$0.01lowest listing$20.00highest
Market price$0.23
Mid listing$0.25
Direct$0.05
30-day avg$0.20

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$0.23
Cardmarket$0.29 €0.26

EUR converted at 1.1215 (ECB reference rate). Shipping and condition not included.

One year

$0.0552-week low$0.2952-week high
In the range75%
All-time low$0.02
All-time high$1.18
First priceSep 15, 2024
Foil · market priceCardmarket (EU, in USD)
$0.00$0.43$0.86$1.30
$0.23
Sep 2024May 2025Feb 2026Oct 2026
TCGplayer · via tcgcsv · Cardmarket · via MTGJSONtcgrate.com

Price story

Underwater Tunnel // Slimy Aquarium (Foil) was released in September 2024. Launch-week prices are left out here: before supply arrives they are mostly guesses. In the last year the price changed +283% and ranged from $0.05 to $0.29, and it now trades in the middle of that range. The cheapest listing right now is $0.01, and the 30-day average market price is $0.20.

Printings

PrintingMarketLowHigh7d
Foil$0.23$0.01$20.00+21.1%
Normal$0.12$0.01$20.00−29.4%

The card in play

Type line
Enchantment — Room
Rules text

(You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.)

Underwater Tunnel

When you unlock this door, surveil 2. (Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)

/

Slimy Aquarium

When you unlock this door, manifest dread, then put a +1/+1 counter on that creature.

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