Pugnacious Hammerskull (FDC) from Foundations Commander, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Kev Walker
• Card Text:
  Whenever this creature attacks while you don't control another Dinosaur, put a stun counter on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)