Shrewd Hatchling (DDJ) from Duel Decks: Izzet vs. Golgari, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Carl Frank
• Card Text:
  Shrewd Hatchling enters the battlefield with four -1/-1 counters on it.
  (U/R): Target creature can't block Shrewd Hatchling this turn.
  Whenever you cast a blue spell, remove a -1/-1 counter from Shrewd Hatchling.
  Whenever you cast a red spell, remove a -1/-1 counter from Shrewd Hatchling.