Mermaid Knight is a Aqua Effect Monster with Attribute WATER, Level 4, ATK 1500, DEF 700.
Monster cards contest the field through Summons, battles, and effects—check Level/Rank/Link and Attribute for Extra Deck or searchers.
On the current TCG and OCG Forbidden & Limited lists tracked here, Mermaid Knight is Unlimited.
YGOPRODeck lists Mermaid Knight for these formats: GOAT, OCG GOAT, Duel Links, Common Charity, Edison, TCG, OCG, Master Duel.
Mermaid Knight belongs to the Umi archetype—use that tag when searching for engine pieces and tech options.
A listed print of Mermaid Knight appears in Ancient Sanctuary (AST-025) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Mermaid Knight is about $0.17 on Cardmarket (prices change frequently).
