Forgotten Ancient (ARC) from Archenemy, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Mark Tedin
• Card Text:
  Whenever a player casts a spell, you may put a +1/+1 counter on Forgotten Ancient.
  At the beginning of your upkeep, you may move any number of +1/+1 counters from Forgotten Ancient onto other creatures.