Stormchaser Mage (OGW) from Oath of the Gatewatch, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Clint Cearley
• Card Text:
  Flying, haste
  Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)