Pitiless Horde (DTK) from Dragons of Tarkir, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Viktor Titov
• Card Text:
  At the beginning of your upkeep, you lose 2 life.
  Dash 2BB (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.)