Voracious Dragon (CON) from Conflux, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Dominick Domingo
• Card Text:
  Flying
  Devour 1 (As this comes into play, you may sacrifice any number of creatures. This creature comes into play with that many +1/+1 counters on it.)
  When Voracious Dragon comes into play, it deals damage to target creature or player equal to twice the number of Goblins it devoured.