Karn, the Great Creator (WAR) from War of the Spark, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Wisnu Tan
• Card Text:
  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.