Wolfwillow Haven (BLC) from Bloomburrow Commander, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Jakub Kasper
• Card Text:
  Enchant land
  Whenever enchanted land is tapped for mana, its controller adds an additional G.
  4G, Sacrifice Wolfwillow Haven: Create a 2/2 green Wolf creaeture token. Activate only during your turn.