Sakashima the Impostor [Mystery Booster] Judge Gift Cards 2004 Activate only during your turn

Activate only during your turn and only once each turn

and crack your cheeks

Set: Unlimited Edition Type: Creature — Human Assassin Rarity: Rare Cost: {1}{B}{B} {T}: Destroy target tapped creature

but how could that be

Set: Eternal Masters Type: Sorcery Rarity: Rare Cost: {X}{G} Search your library for a green creature card with mana value X or less

Sakashima the Impostor [Mystery Booster] Judge Gift Cards 2004 Activate only during your turnSet: Mystery Booster Type: Legendary Creature Human Rogue Rarity: Rare Cost: {2}{U}{U} You may have Sakashima the Impostor enter the battlefield as a copy of any creature on the battlefield, except its name is Sakashima the Impostor, it's legendary in addition to its other types, and it has "{2}{U}{U}: Return this creature to its owner's hand at the beginning of the next end step."