Unholy Annex // Ritual Chamber (Borderless) #339 – Duskmourn: House of Horror (Rare)

Magic: The Gathering · Duskmourn: House of Horror · Rare

Unholy Annex // Ritual Chamber (Borderless) #339 Price

Unholy Annex // Ritual Chamber (Borderless) (#339, Rare) from Duskmourn: House of Horror is worth $2.98 to $4.68 in Near Mint condition on TCGplayer as of October 3, 2026, depending on the printing (Normal to Foil). On Cardmarket, Europe's main marketplace, the Foil sells for €4.48.

Near Mint · TCGplayer: $4.68
Near Mint · Cardmarket: €4.48
30-day change: +11.2%
Printings: 2

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Unholy Annex // Ritual Chamber (Borderless) prices by printing

Near Mint market prices, updated October 4, 2026.

Printing	TCGplayer (USD)	Cardmarket (EUR)
Foil	$4.68	€4.48
Normal	$2.98	€2.83

TCGplayer market price and Cardmarket price for Near Mint English copies. They are two separate markets, so the euro figure is Cardmarket's own price, not a conversion of the dollar one. Source: TCGplayer, Cardmarket.

Card details

Set: Duskmourn: House of Horror
Card number: 339
Rarity: Rare
Released: September 27, 2024
Illustrator: Alexis Ziritt
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.)
Unholy Annex
At the beginning of your end step, draw a card. If you control a Demon, each opponent loses 2 life and you gain 2 life. Otherwise, you lose 2 life.
/
Ritual Chamber
When you unlock this door, create a 6/6 black Demon creature token with flying.

Unholy Annex // Ritual Chamber (Borderless): common questions

How much is Unholy Annex // Ritual Chamber (Borderless) #339 worth?

Unholy Annex // Ritual Chamber (Borderless) (#339, Rare) from Duskmourn: House of Horror is worth $2.98 to $4.68 in Near Mint condition on TCGplayer as of October 3, 2026, depending on the printing (Normal to Foil). On Cardmarket, Europe's main marketplace, the Foil sells for €4.48.

What set is Unholy Annex // Ritual Chamber (Borderless) from?

Unholy Annex // Ritual Chamber (Borderless) is card 339 in Duskmourn: House of Horror, released September 27, 2024. Its rarity is Rare. Illustrated by Alexis Ziritt.

Is Unholy Annex // Ritual Chamber (Borderless) going up in price?

Over the last 30 days the Near Mint Foil price on TCGplayer moved from $4.21 (September 5, 2026) to $4.68 (October 3, 2026), a change of +11.2%. The 30-day low was $4.12 and the high $4.68.

How do I check what my Unholy Annex // Ritual Chamber (Borderless) is worth?

Scan it with the TCG Vault app on iPhone: it identifies the card from the camera in seconds and shows its current market price and price history, then keeps it in your collection so you can follow its value.