Mardu Shadowspear (FRF) from Fate Reforged, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Mark Poole
• Card Text:
  Whenever Mardu Shadowspear attacks, each opponent loses 1 life.
  Dash 1B (You may cast this spell for its dash cost. If you do, it gains haste, and it's returned from the battlefield to its owner's hand at the beginning of the next end step.)