Gyre Sage (GTC) from Gatecrash, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Tyler Jacobson
• Card Text:
  Evolve (Whenever a creature enters the battlefield under your control, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.)
  T: Add G to your mana pool for each +1/+1 counter on Gyre Sage.