Freejam Regent (AER) from Aether Revolt, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Volkan Baǵa
• Card Text:
  Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for 1.)
  Flying
  1R: Freejam Regent gets +2/+0 until end of turn.