![Umbreon (24/100) [EX: Sandstorm] BT12-043 during your opponent's Standby Phase:](https://cdn.shopify.com/s/files/1/0757/5211/2443/files/1a36b2b8-7861-46b6-bbac-535221265fd0.png?v=1731675500)
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during your opponent's Standby Phase: This card's ATK becomes double its current ATK until the end of this turn
Set: OTS Tournament Pack 6 Card type: Continuous Spell Rarity: Ultimate Rare When this card is activated: Fusion Summon 1 "Gem-Knight" Fusion Monster from your Extra Deck
you can return 1 monster your opponent controls to its owner's hand
Set: Premium Gold Card type: Synchro/Effect Monster Rarity: Gold Secret Rare Attack: 2300 Defense: 2500 1 Tuner + 1 or more non-Tuner monsters During your turn
Set: XY: Phantom Forces Type: Lightning Rarity: Rare Retreat cost: Colorless
Umbreon (24/100) [EX: Sandstorm] BT12-043 during your opponent's Standby Phase:Set: EX: Sandstorm Type: Darkness Rarity: Rare Retreat cost: Colorless
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