Polis Crusher (THS) from Theros, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Chase Stone
• Card Text:
  Trample, protection from enchantments
  {4}{R}{G}: Monstrosity 3. (If this creature isn't monstrous, put three +1/+1 counters on it and it becomes monstrous.)
  Whenever Polis Crusher deals combat damage to a player, if Polis Crusher is monstrous, destroy target enchantment that player controls.