Kalonian Hydra (M14) from Magic 2014, available at 401 Games Canada.

• Rarity: Mythic Rare
• Finish: Normal
• Artist: Chris Rahn
• Card Text:
  Trample
  Kalonian Hydra enters the battlefield with four +1/+1 counters on it.
  Whenever Kalonian Hydra attacks, double the number of +1/+1 counters on each creature you control.