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

• Rarity: Mythic Rare
• Finish: Normal
• Artist: Viktor Titov
• Card Text:
  Lifelink
  When Intrepid Adversary enters the battlefield, you may pay 1W any number of times. when you pay this cost one or more times, put that many valor counters on Intrepid Adversary.
  Creatures you control get +1/+1 for each valor counter on Intrepid Adversary.