Azorius Keyrune (RTR) from Return to Ravnica, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Daniel Ljunggren
• Card Text:
  T: Add W or U to your mana pool.
  WU: Azorius Keyrune becomes a 2/2 blue and white Bird artifact creature with flying until end of turn.