Soulherder (MH1) from Modern Horizons, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Seb McKinnon
• Card Text:
  Whenever a creature is exiled from the battlefield, put a +1/+1 counter on Soulherder.
  At the beginning of your end step, you may exile another target creature you control, then return that card to the battlefield under its owner’s control.