K9-66X "Jacks"
Xyz Effect Monster
K9-66X "Jacks" is a Xyz Effect Monster (DARK/Fiend, Rank 5) with 2600 ATK / 2500 DEF. First printed in Doom of Dimensions (2025).
- Type
- XYZ Monster
- Attribute
- DARK
- Monster type
- Fiend
- Rank
- 5
- ATK / DEF
- 2600 / 2500
- Archetype
- K9
- Banlist
- Unlimited in the TCG, OCG, and Master Duel
- TCG release
- Sep 25, 2025
- Printings
- 1
Card text
2 Level 5 monsters If this card is Xyz Summoned, or if your opponent activates a monster effect in the hand or GY: You can detach 1 material from this card, then target 1 monster on the field; destroy it. You can only use this effect of "K9-66X "Jacks"" once per turn. A "K9" Xyz Monster that has this card as material gains this effect. ●During any turn in which your opponent has activated a monster effect in the hand or GY, any battle damage this card inflicts to your opponent is doubled.
YGOPRODeck card-level price
≈$0.36 lowest USD figure across marketplaces, for no one printing
YGOPRODeck recorded a lowest available USD card-level price hint of ~$0.36 on Oct 26, 2026 (historical, not a printing-specific quote). It varies with printing, condition, edition, rarity, and grading. Check current listings before buying or selling.
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Printings & rarities
| Set | Set code | Rarity | Release | Price* | Buy |
|---|---|---|---|---|---|
| Doom of DimensionsDOOD-EN047 · Super Rare · Sep 25, 2025 | DOOD-EN047 | Super Rare | Sep 25, 2025 | ~$0.371st Edition | Buy on TCGplayerSearch eBay |
*Approximate price hints, not appraisals. A price with a finish (1st Edition, Unlimited, Limited) is TCGplayer's for that set code, rarity and finish, via TCGCSV, updated Oct 26, 2026. A price marked YGOPRODeck is YGOPRODeck's figure for that printing. A dash means that printing has no price yet. Buy links are affiliate links.
Price hint history
Dated YGOPRODeck snapshots. These hints are not sales or market values.
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K9-66X "Jacks" in other languages
| Japanese | K９－６６６号 “Jacks” |
| Korean | K9－666호 “Jacks” |
| Chinese | K9－666号 “结克” |
| German | K9-66X „Jacks“ |
| French | K9-66X "Jacks" |
| Italian | K9-66X "Jacks" |
| Spanish | K9-66X "Jacks" |
| Portuguese | "Jacks" K9-66X |
