Yu-Gi-Oh! · Battles of Legend: Monster Mayhem
Gem-Knight Lady Brilliant Diamond
French name: Diamant Brillant, Dame Chevalier-Gemmes
Gem-Knight Lady Brilliant Diamond (Battles of Legend: Monster Mayhem BLMM-EN145) has a market price of US$0.20 as of Nov 10, 2026.
Price guide
The market price on TCGplayer, in US dollars: a guide, not an offer.
Market price
As of Nov 10, 2026 · The market price is TCGplayer’s, in US dollars. It is a guide, not an offer.
Card details
- Type
- Fusion Monster
- Level
- 10
- Attribute
- EARTH
- Monster type
- Rock
- Archetype
- Gem-
- ATK
- 3,400
- DEF
- 2,000
Card text
3 "Gem-Knight" monsters Must first be Fusion Summoned with the above Fusion Materials. You can only Special Summon "Gem-Knight Lady Brilliant Diamond(s)" once per turn. Once per turn: You can send 1 face-up "Gem-Knight" monster you control to the Graveyard, and if you do, Special Summon 1 "Gem-Knight" Fusion Monster from your Extra Deck, ignoring its Summoning conditions.
About this card
Gem-Knight Lady Brilliant Diamond is card BLMM-EN145 in Battles of Legend: Monster Mayhem, a Yu-Gi-Oh! set released Jun 13, 2025. Rarity: Secret Rare. Finishes: 1st Edition. Reference market price on Nov 10, 2026: US$0.20. Over the last 30 days, the 1st Edition price went down 25.0%. Source: TCGplayer market data via tcgcsv.com, updated daily. A reference price is not an offer.
