Battlefield Scavenger (AKH) from Amonkhet, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Dan Murayama Scott
• Card Text:
  You may exert Battlefield Scavenger as it attacks. (It won't untap during your next untap step.)
  Whenever you exert a creature, you may discard a card. If you do, draw a card.