Battering Wurm (GPT) from Guildpact, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Darrell Riche
• Card Text:
  Bloodthirst 1 (If an opponent was dealt damage this turn, this creature comes into play with a +1/+1 counter on it.)
  Creatures with power less than Battering Wurm's power can't block it.