Karn, the Great Creator (Stained Glass) #501

Stained Glass Planeswalkers Activated abilities of artifacts your opponents control can’t be activated. [+1]: Until your next turn, up to one target noncreature artifact becomes an artifact creature with power and toughness equal to its converted mana cost. [-2]: You may choose an artifact card you own from outside the game or in exile, reveal that card, and put it into your hand.