Yu-Gi-Oh! · Battles of Legend: Monster Mayhem
Gem-Knight Aquamarine
French name: Aigue-Marine, Chevalier-Gemmes
Gem-Knight Aquamarine (Battles of Legend: Monster Mayhem BLMM-EN137) has a market price of US$0.19 as of Nov 9, 2026.
Price guide
The market price on TCGplayer, in US dollars: a guide, not an offer.
Market price
As of Nov 9, 2026 · The market price is TCGplayer’s, in US dollars. It is a guide, not an offer.
Card details
- Type
- Fusion Monster
- Level
- 6
- Attribute
- EARTH
- Monster type
- Aqua
- Archetype
- Gem-
- ATK
- 1,400
- DEF
- 2,600
Card text
"Gem-Knight Sapphire" + 1 "Gem-Knight" monster Must first be Fusion Summoned with the above Fusion Material Monsters. If this card attacks, it is changed to Defense Position at the end of the Battle Phase. When this card is sent from the field to the Graveyard: Target 1 card your opponent controls; return that target to the hand.
About this card
Gem-Knight Aquamarine is card BLMM-EN137 in Battles of Legend: Monster Mayhem, a Yu-Gi-Oh! set released Jun 13, 2025. Rarity: Ultra Rare. Finishes: 1st Edition. Reference market price on Nov 9, 2026: US$0.19. Over the last 30 days, the 1st Edition price went down 20.8%. Source: TCGplayer market data via tcgcsv.com, updated daily. A reference price is not an offer.
