Yu-Gi-Oh! trading card price guide
Gem-Knight Hollowcore BLMM-EN022
Battles of Legend: Monster Mayhem · Secret Rare
Card Intelligence
Market activity snapshot
Last 90 days ·
- Catalog-matched online sales observed
- 90 — 90-day observation window
- Liquidity
- High — Consistent recent sale activity
- DeckTradr popularity
- Low — Based on aggregated DeckTradr engagement
- Data confidence
- Medium — Based on signal coverage and freshness
$0.18 — DeckTradr online market value · NM · No variant recorded
Accelerating — Compared with the previous 30-day period
DeckTradr combines privacy-qualified in-person POS activity, catalog-matched online sale observations, and aggregated first-party engagement signals. Counts represent activity available to DeckTradr, not every action or sale across the market.
Card facts
Yu-Gi-Oh! · trading card
Gem-Knight Hollowcore BLMM-EN022 is cataloged as a trading card from Battles of Legend: Monster Mayhem for Yu-Gi-Oh!.
The catalog identifies this item with collector number BLMM-EN022, rarity listed as Secret Rare, Normal printing.
Available catalog metadata records a release date of June 13, 2025.
Catalog facts
- Game
- Yu-Gi-Oh!
- Set
- Battles of Legend: Monster Mayhem
- Collector number
- BLMM-EN022
- Rarity
- Secret Rare
- Release date
- June 13, 2025
- Printing
- Normal
- Card type
- Effect Monster
Gameplay facts
- Flavor text
- 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.