Karn, the Great Creator
Legendary Planeswalker - Karn | Loyalty: 5 (CMC 4)
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.
- [WAR] War of the Spark #1 (R)