Primeval Protector (C16) from Commander 2016, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Jaime Jones
• Card Text:
  Primeval Protector costs 1 less to cast for each creature your opponents control.
  When Primeval Protector enters the battlefield, put a +1/+1 counter on each other creature you control.