ATTACK: 1800
DEFENSE: 900
ATTRIBUTE: EARTH
CARD TYPE: Gemini Monster
DESCRIPTION: This card is treated as a Normal Monster while face-up on the field or in the Graveyard. While this card is face-up on the field, you can Normal Summon it to have it become an Effect Monster with this effect. // * When this card destroys an opponent's monster by battle and sends it to the Graveyard: You can add 1 "Gem-Knight" card from your Deck to your hand.
MONSTERTYPE: Pyro

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PRICE FAQ

What is Gem-Knight Sardonyx (Hidden Arsenal 7: Knight of Stars) worth today?

Gem-Knight Sardonyx [Unlimited] has a TCGplayer market price of $0.50 as of 2026-09-17. Across 2 tracked variants, latest prices range from $0.39 to $0.50.

What is the all-time high price for Gem-Knight Sardonyx?

In TickerMint's daily data (since September 2026), the all-time high market price for Gem-Knight Sardonyx [Unlimited] is $0.50 (2026-09-16) and the all-time low is $0.50 (2026-09-16).

What would a seller actually net for Gem-Knight Sardonyx?

The TickerMint Estimate for Gem-Knight Sardonyx is $0.50. It is a fee-adjusted fair value blending TCGplayer and eBay data to estimate what a seller nets after marketplace fees.

how these numbers are computed →

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