· Battles of Legend: Monster Mayhem

Gem-Knight Lady Brilliant Diamond

EN145 • Secret Rare

A near-mint Gem-Knight Lady Brilliant Diamond #EN145 from Battles of Legend: Monster Mayhem (Yu-Gi-Oh!) is worth about £0.16.

Market value

£0.16

JustTCG

eBay search

Near Mint 1st Edition

£0.16

Lightly Played 1st Edition

£0.16

Moderately Played 1st Edition

£0.15

As an eBay Partner, we may be compensated if you make a purchase.

About Gem-Knight Lady Brilliant Diamond

Gem-Knight Lady Brilliant Diamond (card #EN145) is a Secret Rare card from the Battles of Legend: Monster Mayhem set in the Yu-Gi-Oh! Trading Card Game. It carries a rarity of Secret Rare, which determines how often it appears in booster packs. The Battles of Legend: Monster Mayhem set was released in 2025. Based on live market data, a near-mint copy is currently valued at around £0.16 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: Battles of Legend: Monster Mayhem
Number: #EN145
Rarity: Secret Rare
Year: 2025
Game: Yu-Gi-Oh!
Market value: £0.16 (near-mint)

Available now

No shops stock this right now

No approved shop currently lists this card. Stock comes from real shops and changes often, so it is worth checking back. In the meantime you can add the card to your collection, save it to your wishlist, or look at the other printings below.

Add to my collection Save to wishlist

Free, and browsing needs no account — one is only needed to save cards of your own.

Price trend

29 data points

Card details

Type: Fusion Effect Monster
Attribute: EARTH
Race: Rock
Level / Rank: 10
ATK / DEF: 3400 / 2000
Archetype: Gem-
Rarity: Secret Rare
Released: 28 Aug 2025

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.