Thornwatch Scarecrow (SHM) from Shadowmoor, available at 401 Games Canada.

• Rarity: Common
• Finish: Normal
• Artist: Chuck Lukacs
• Card Text:
  Thornwatch Scarecrow has wither as long as you control a green creature. (It deals damage to creatures in the form of -1/-1 counters.)
  Thornwatch Scarecrow has vigilance as long as you control a white creature.