Hellspark Elemental (DDK) from Duel Decks: Sorin vs. Tibalt, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Justin Sweet
• Card Text:
  Trample, haste
  At the beginning of the end step, sacrifice Hellspark Elemental.
  Unearth 1R (1R: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)