Shrewd Hatchling [Mystery Booster]

Set: Mystery Booster Type: Creature — Elemental Rarity: Uncommon Cost: {3}{U/R} 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.