Noxious Hatchling (EVE) from Eventide, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Nils Hamm
• Card Text:
  Noxious Hatchling comes into play with four -1/-1 counters on it.
  Wither (This deals damage to creatures in the form of -1/-1 counters.)
  Whenever you play a black spell, remove a -1/-1 counter from Noxious Hatchling.
  Whenever you play a green spell, remove a -1/-1 counter from Noxious Hatchling.