Gem-Knight Aquamarine
Hidden Arsenal 5: Steelswarm Invasion · #EN020

Gem-Knight Aquamarine

Gem-Knight Aquamarine is a Secret Rare Fusion Monster from Hidden Arsenal 5: Steelswarm Invasion (EN020) in the Yu-Gi-Oh! TCG. Stats: EARTH, Level 6, ATK 1400, DEF 2600. Archetype: Gem-. Cactaur's latest catalog snapshot shows a market reference near $1.44 for ungraded copies.

Hidden Arsenal 5: Steelswarm Invasion set collectorsGem- deck buildersPrice-conscious singles buyers
TCGPlayer market $1.44
Cardmarket trend
Rarity Secret Rare
App coming soon

Who is this card for?

Gem-Knight Aquamarine suits collectors and players working on Hidden Arsenal 5: Steelswarm Invasion who need the Secret Rare slot. Compare listing photos to your target edition and confirm the YGOPRODeck set code before buying online.

What is Gem-Knight Aquamarine from Hidden Arsenal 5: Steelswarm Invasion?

Gem-Knight Aquamarine is a Fusion Monster in Hidden Arsenal 5: Steelswarm Invasion numbered EN020. EARTH, Level 6, ATK 1400, DEF 2600. Archetype: Gem-. Gem-Knight Aquamarine (EN020) from Hidden Arsenal 5: Steelswarm Invasion should be evaluated with set context, stats, archetype, and condition together.

What is Gem-Knight Aquamarine worth today?

Cactaur tracks a market reference near $1.44 for Gem-Knight Aquamarine. Low and high spread runs $1.44 to null. This printing is from Hidden Arsenal 5: Steelswarm Invasion. Collector number EN020 distinguishes this printing from same-name cards in other sets. Catalogued rarity: Secret Rare.

SetHidden Arsenal 5: Steelswarm Invasion
NumberEN020
RaritySecret Rare
TCGPlayer USD$1.44
Cardmarket EUR

How collectible is Gem-Knight Aquamarine?

Gem-Knight Aquamarine is a Secret Rare printing in Hidden Arsenal 5: Steelswarm Invasion. Master set builders use set code and passcode to track completion progress. This printing is from Hidden Arsenal 5: Steelswarm Invasion. Collector number EN020 distinguishes this printing from same-name cards in other sets.

What are the key details for Gem-Knight Aquamarine?

Gem-Knight Aquamarine lists as Fusion Monster (Aqua). Rules text is indexed in the catalog for search and deck research. This printing is from Hidden Arsenal 5: Steelswarm Invasion. Collector number EN020 distinguishes this printing from same-name cards in other sets. Catalogued rarity: Secret Rare.

Cactaur's take

Gem-Knight Aquamarine (EN020) from Hidden Arsenal 5: Steelswarm Invasion should be evaluated with set context, stats, archetype, and condition together.

Pros

  • Gem-Knight Aquamarine is catalogued as Secret Rare Fusion Monster in Hidden Arsenal 5: Steelswarm Invasion, making set code and passcode verification straightforward.
  • Public market data shows a reference near $1.44.
  • EARTH, Level 6, ATK 1400, DEF 2600 helps deck builders confirm the correct printing quickly.

Cons

  • Raw market prices vary by condition and edition — near-mint estimates are not slab grades.

Verdict: Use $1.44 as a benchmark, then adjust for edition, grade, and how quickly you need to buy or sell.

FAQ

What is Gem-Knight Aquamarine from Hidden Arsenal 5: Steelswarm Invasion?

Gem-Knight Aquamarine is a Secret Rare Fusion Monster from Hidden Arsenal 5: Steelswarm Invasion numbered EN020 in the Yu-Gi-Oh! TCG. Cactaur indexes set, rarity, stats, and market references for this printing.

How much is Gem-Knight Aquamarine worth?

Cactaur's catalog snapshot shows a market reference near $1.44 for ungraded Gem-Knight Aquamarine. Condition, edition, and recent sold comps can move realized prices above or below that benchmark.

What rarity is Gem-Knight Aquamarine?

Gem-Knight Aquamarine is catalogued as Secret Rare in Hidden Arsenal 5: Steelswarm Invasion. Use the set code on listings to confirm you are buying this exact printing.

How do I verify the correct Gem-Knight Aquamarine printing?

Match set code ha05, collector number EN020, and edition. YGOPRODeck-backed metadata on this page is the reference Cactaur uses for catalog keys. This printing is from Hidden Arsenal 5: Steelswarm Invasion.

Should I buy Gem-Knight Aquamarine near mint or played?

Near-mint copies command the catalog reference near $1.44. Heavily played copies trade lower unless the card is a chase rare where any clean copy is scarce.

Related cards

Trust & data sources. Cactaur displays catalog and market data from pokemontcg.io embedded TCGPlayer/Cardmarket references. Prices change frequently and are not guarantees.

Cactaur does not authenticate cards or guarantee values. Scan your copy in the iPhone app for condition-aware guidance.

Catalog snapshot: 2026-06-25. Last updated: 2026-06-25.