Mermaid Knight
Effect Monster
Mermaid Knight is a Effect Monster (WATER/Aqua, Level 4) with 1500 ATK / 700 DEF. First printed in Ancient Sanctuary (2004).
- Type
- Effect Monster
- Attribute
- WATER
- Monster type
- Aqua
- Level
- 4
- ATK / DEF
- 1500 / 700
- Archetype
- Umi
- Banlist
- Unlimited in the TCG, OCG, and Master Duel
- TCG release
- 2004-06-01
- Printings
- 3
Card text
As long as "Umi" remains face-up on the field, this card can attack twice during the same Battle Phase.
Approximate value
≈$0.39
A rough figure from recent listings (updated 2026-06-09), not a market value or official price. It varies a lot with printing, condition, edition, rarity, and grading. Check current listings below before buying or selling.
Find a copy
As an Amazon Associate I earn from qualifying purchases. As an eBay Partner Network affiliate, we may earn commissions from qualifying purchases. Some outbound marketplace links may be affiliate links; if you buy through them we may earn a commission, at no extra cost to you.
Printings & rarities
All printings →| Set | Set code | Rarity | Release | Price* |
|---|---|---|---|---|
| Ancient Sanctuary | AST-025 | Common | 2004-06-01 | $1.27 |
| Structure Deck: Fury from the Deep | SD4-EN011 | Common | 2005-05-09 | $1.54 |
| Dark Revelation Volume 2 | DR2-EN137 | Rare | 2005-10-20 | $0.39 |
*Approximate, from recent marketplace listings, not market values.
Mermaid Knight in other languages
| Japanese | マーメイド・ナイト |
| Korean | 인어 나이트 |
| German | Meerjungfrau-Ritter |
| French | Chevalier Sirène |
| Italian | Sirena Cavaliere |
| Spanish | Caballero Sirena |
| Portuguese | Cavaleira Sereia |
