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 each 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.
![Karn, the Great Creator (JP Alternate Art) [War of the Spark] | Jack's On Queen](http://jacksonqueen.ca/cdn/shop/products/9b572739-0a10-4af0-9014-dd81b67b3dbb.jpg?v=1569496512)
