Spectral Adversary (DBL) from Innistrad: Double Feature, available at 401 Games Canada.

• Rarity: Mythic Rare
• Finish: Normal
• Artist: Uriah Voth
• Card Text:
  Flash
  Flying
  When Spectral Adversary enters the battlefield, you may pay 1U any number of times. When you pay this cost one or more times, put that many +1/+1 counters on Spectral Adversary, then up to that many other target artifacts, creatures, and/or enchantments phase out.