Mermaid Knight
Mermaid Knight is a Effect Monster in the Umi archetype, first released in 2004 in Ancient Sanctuary. It has 3 printings across 3 sets (Common, Rare). The cheapest copy is SD4-EN011 Common at $0.49; the most valuable is DR2-EN137 Rare at $8.83. In the TCG it is currently unlimited (3 copies).
Market price · TCGPlayer
Updated Oct 1, 2026
$0.49 – $8.83
3 printings priced
Type
Aqua
Level
4
ATK
1500
DEF
700
As long as Umi remains face-up on the field, this card can attack twice during the same Battle Phase.
Appears in 3 expansions
Printings (3)
| expansion | Code | Rarity | Price | Buy |
|---|---|---|---|---|
| Ancient Sanctuary | AST-025 | Common | $0.62 | |
| Structure Deck: Fury from the Deep | SD4-EN011 | Common | $0.49 | |
| Dark Revelation Volume 2 | DR2-EN137 | Rare | $8.83 |
Mermaid Knight: FAQ
How much is Mermaid Knight worth?+
Mermaid Knight currently sells for $0.49 – $8.83 on TCGPlayer, from $0.49 for SD4-EN011 up to $8.83 for DR2-EN137. The exact value depends on the printing, rarity, edition and condition — scan the card with YuScan to see the price of your copy.
Which sets was Mermaid Knight printed in?+
Mermaid Knight appears in 3 sets: Ancient Sanctuary, Structure Deck: Fury from the Deep, Dark Revelation Volume 2.
Is Mermaid Knight legal in tournaments?+
On the current TCG Forbidden & Limited List, Mermaid Knight is unlimited (3 copies).
What is the passcode of Mermaid Knight?+
The 8-digit passcode printed on Mermaid Knight is 24435369.
Umi
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