· Quarter Century Stampede

Gem-Knight Master Diamond

EN178 • Platinum Secret Rare

A near-mint Gem-Knight Master Diamond #EN178 from Quarter Century Stampede (Yu-Gi-Oh!) is worth about £0.17.

Market value

£0.17

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Lightly Played 1st Edition

£0.18

Near Mint 1st Edition

£0.17

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About Gem-Knight Master Diamond

Gem-Knight Master Diamond (card #EN178) is a Platinum Secret Rare card from the Quarter Century Stampede set in the Yu-Gi-Oh! Trading Card Game. It carries a rarity of Platinum Secret Rare, which determines how often it appears in booster packs. The Quarter Century Stampede set was released in 2025. Based on live market data, a near-mint copy is currently valued at around £0.17 on The TCG OS. Track its full price history, compare raw and graded values, browse other printings, and find live listings below.

Card details

Set: Quarter Century Stampede
Number: #EN178
Rarity: Platinum Secret Rare
Year: 2025
Game: Yu-Gi-Oh!
Market value: £0.17 (near-mint)

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Card details

Type: Fusion Effect Monster
Attribute: EARTH
Race: Rock
Level / Rank: 9
ATK / DEF: 2900 / 2500
Archetype: Gem-
Rarity: Platinum Secret Rare
Released: 10 Apr 2025

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.