Hoarding Broodlord - Promo Pack (PMOM) from March of the Machine, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Filip Burburan
• Card Text:
  Convoke
  Flying
  When Hoarding Broodlord enters the battlefield, search your library for a card, exile it face down, then shuffle. For as long as that card remains exiled, you may play it.
  Spells you cast from exile have convoke.