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 mana value.
−2: You may reveal an artifact card you own from outside the game or choose a face-up artifact card you own in exile. Put that card into your hand.
![Karn, the Great Creator (Promo Pack) [War of the Spark Promos]](http://tothetablebgc.myshopify.com/cdn/shop/files/4455b2fd-3b44-4100-9573-5d2ba4507b6c_6c85ed75-5f8a-4325-bda7-47f939f26eb6.png?v=1776361304&width=1445)
