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 [War of the Spark] | The Clever Kobold](http://thecleverkobold.com/cdn/shop/products/3ec0c0fb-1a4f-45f4-85b7-346a6d3ce2c5.jpg?v=1574471898)
