Simulated holo effect, for illustration only.
Battles of Legend: Monster Mayhem
Gem-Knight Master Diamond
- Expansion
- Battles of Legend: Monster Mayhem
- Code
- BLMM-EN143
- Rarity
- Ultra Rare
- Card type
- Monster · Rock/Fusion/Effect
- Attribute
- EARTH
- Level
- 9
- ATK / DEF
- 2900 / 2500
- Archetype
- Gem-
Card text
3 "Gem-Knight" monsters Must first be Fusion Summoned. This card gains 100 ATK for each "Gem-" monster in your Graveyard. Once per turn: You can banish 1 Level 7 or lower "Gem-Knight" Fusion Monster from your Graveyard; until the End Phase, this card's name becomes that monster's, and replace this effect with that monster's original effects.
Other printings
- RA04-EN178Quarter Century StampedePlatinum Secret Rare
- RA04-EN178Quarter Century StampedeQuarter Century Secret Rare
- SP15-EN030Star Pack ARC-VCommon
- SP15-EN030Star Pack ARC-VShatterfoil Rare
- HA07-EN059Hidden Arsenal 7: Knight of StarsSecret Rare
- DT07-EN083Duel Terminal 7bDuel Terminal Ultra Parallel Rare
Price history
Ungraded cards
Condition: Near Mint (Mint and Near Mint)
- From
- —
- Price trend
- €0.16
- Average price 30 days
- €0.12
- Average price 7 days
- €0.11
- Average price 1 day
- €0.19
Oct 2, 2026 · €0.16
The dashed line is an estimate from the markets' rolling averages; recorded history starts on Oct 1, 2026.
Show data as a table
| Date | Price | Low |
|---|---|---|
| Oct 2, 2026 | €0.16 | — |
| Oct 1, 2026 | €0.15 | — |
| Sep 24, 2026 (estimate) | €0.11 | — |
| Sep 1, 2026 (estimate) | €0.12 | — |
Graded index
Certified cards, by grader and grade — kept apart from ungraded prices.
No graded prices
There aren't enough reliable offers for this graded card on external markets.