The Gem-Knight Hollowcore (BLMM-EN022) is a Secret Rare Yu-Gi-Oh! trading card from the 2025 Battles of Legend: Monster Mayhem set, featuring a distinctive holographic finish.
Gem-Knight Hollowcore
2025 • Yu-Gi-Oh! • Battles of Legend: Monster Mayhem
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Description
Collectors of the Yu-Gi-Oh! Trading Card Game often seek out the Gem-Knight Hollowcore for its place within the 2025 Battles of Legend: Monster Mayhem expansion. The holographic treatment applied to this card provides a unique reflective quality that distinguishes it from standard print runs. For those who enjoy building specialized collections or completing set checklists, the Gem-Knight Hollowcore represents a tangible piece of the 2025 Yu-Gi-Oh! Landscape. The Battles of Legend series continues to expand the franchise's visual identity, and this card serves as a notable entry for enthusiasts tracking the evolution of the Gem-Knight archetype. Whether you are a long-time veteran of the duel world or a new collector exploring the 2025 releases, this Secret Rare variant offers a distinct addition to any binder. The combination of the Monster Mayhem set's theme and the Secret Rare status makes it a focal point for display. Focus on the identity of the card: the Gem-Knight Hollowcore is defined by its set affiliation and rare finish. It stands as a clear example of the detailed production values found in modern Yu-Gi-Oh! Releases. By targeting this card number, you ensure you are acquiring the correct version of the Gem-Knight Hollowcore, avoiding confusion with other prints or reprints that may exist in the broader market.
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Card Details
The catalog profile below summarizes the card identity, featured subject, and notable collectible traits.
Catalog Profile
The core identity of the card within the set.
Featured Subject
The subject, team, league, and sport context tied to this card.
Featured
Gem-Knight Hollowcore
Game
Yu-Gi-Oh!
TCG Attributes
Rarity, print treatment, and game-specific stats for this card.
Secret Rare
Card Stock
English
Holo
Dark
Fiend
7
1950 / 2450
Gem-
Card Text
Abilities, attacks, oracle text, and flavor text printed on the card.
You can send 1 "Gem-Knight" Normal Monster or 1 "Gem-Knight Fusion" from your Deck to the GY; Special Summon this card from your hand in Defense Position. When your opponent activates a card or effect, while you control a "Gem-Knight" Fusion Monster (Quick Effect): You can banish 3 "Gem-Knight" cards from your GY, including this card; negate that effect, then all "Gem-Knight" monsters you currently control gain 1000 ATK. You can only use each effect of "Gem-Knight Hollowcore" once per turn.