Loathsome Catoblepas (THS) from Theros, available at 401 Games Canada.

• Rarity: Common
• Finish: Normal
• Artist: Christopher Burdett
• Card Text:
  2G: Loathsome Catoblepas must be blocked this turn if able.
  When Loathsome Catoblepas dies, target creature an opponent controls gets -3/-3 until end of turn.