Wildfire Cerberus (JOU) from Journey into Nyx, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Slawomir Maniak
• Card Text:
  5RR: Monstrosity 1. (If this creature isn't monstrous, put a +1/+1 counter on it and it becomes monstrous.)
  When Wildfire Cerberus becomes monstrous, it deals 2 damage to each opponent and each creature your opponents control.