Gem-Knight Master Diamond
Battles of Legend: Monster Mayhem · #EN143

Gem-Knight Master Diamond

Gem-Knight Master Diamond is a Ultra Rare Fusion Monster from Battles of Legend: Monster Mayhem (EN143) in the Yu-Gi-Oh! TCG. Stats: EARTH, Level 9, ATK 2900, DEF 2500. Archetype: Gem-. Cactaur's latest catalog snapshot shows a market reference near $0.18 for ungraded copies.

Battles of Legend: Monster Mayhem set collectorsTournament deck buildersBanlist-aware buyers [object Object]
TCGPlayer market $0.18
Cardmarket trend
Rarity Ultra Rare
App coming soon

Who is this card for?

Gem-Knight Master Diamond suits collectors and players working on Battles of Legend: Monster Mayhem who need the Ultra Rare slot. TCG banlist status: Limited. Confirm the exact set code and edition before buying for a tournament deck.

What is Gem-Knight Master Diamond from Battles of Legend: Monster Mayhem?

Gem-Knight Master Diamond is a Fusion Monster in Battles of Legend: Monster Mayhem numbered EN143. EARTH, Level 9, ATK 2900, DEF 2500. Archetype: Gem-. Gem-Knight Master Diamond (EN143) is a format-relevant Fusion Monster in Battles of Legend: Monster Mayhem with TCG banlist status Limited. Tournament demand and reprint risk often explain price as much as rarity alone.

What is Gem-Knight Master Diamond worth today?

Cactaur tracks a market reference near $0.18 for Gem-Knight Master Diamond. Low and high spread runs $0.18 to null. This printing is from Battles of Legend: Monster Mayhem. Collector number EN143 distinguishes this printing from same-name cards in other sets. Catalogued rarity: Ultra Rare.

SetBattles of Legend: Monster Mayhem
NumberEN143
RarityUltra Rare
TCGPlayer USD$0.18
Cardmarket EUR

How collectible is Gem-Knight Master Diamond?

Gem-Knight Master Diamond is a Ultra Rare printing in Battles of Legend: Monster Mayhem. Banlist and format demand can sustain prices even when booster supply is deep. This printing is from Battles of Legend: Monster Mayhem. Collector number EN143 distinguishes this printing from same-name cards in other sets.

What are the key details for Gem-Knight Master Diamond?

Gem-Knight Master Diamond lists as Fusion Monster (Rock). Rules text is indexed in the catalog for search and deck research. TCG banlist: Limited. This printing is from Battles of Legend: Monster Mayhem. Collector number EN143 distinguishes this printing from same-name cards in other sets.

Cactaur's take

Gem-Knight Master Diamond (EN143) is a format-relevant Fusion Monster in Battles of Legend: Monster Mayhem with TCG banlist status Limited. Tournament demand and reprint risk often explain price as much as rarity alone.

Pros

  • Gem-Knight Master Diamond is catalogued as Ultra Rare Fusion Monster in Battles of Legend: Monster Mayhem, making set code and passcode verification straightforward.
  • Public market data shows a reference near $0.18.
  • EARTH, Level 9, ATK 2900, DEF 2500 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 $0.18 as a benchmark, then adjust for edition, grade, and how quickly you need to buy or sell.

FAQ

What is Gem-Knight Master Diamond from Battles of Legend: Monster Mayhem?

Gem-Knight Master Diamond is a Ultra Rare Fusion Monster from Battles of Legend: Monster Mayhem numbered EN143 in the Yu-Gi-Oh! TCG. Cactaur indexes set, rarity, stats, and market references for this printing.

How much is Gem-Knight Master Diamond worth?

Cactaur's catalog snapshot shows a market reference near $0.18 for ungraded Gem-Knight Master Diamond. Condition, edition, and recent sold comps can move realized prices above or below that benchmark.

What rarity is Gem-Knight Master Diamond?

Gem-Knight Master Diamond is catalogued as Ultra Rare in Battles of Legend: Monster Mayhem. Use the set code on listings to confirm you are buying this exact printing.

Is Gem-Knight Master Diamond on the TCG banlist?

Gem-Knight Master Diamond shows TCG banlist status Limited based on our latest ingest. Always verify ban-list updates before registering a deck for an event. This printing is from Battles of Legend: Monster Mayhem.

Should I buy Gem-Knight Master Diamond near mint or played?

Near-mint copies command the catalog reference near $0.18. 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.