Dark Petition (ORI) from Magic Origins, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Igor Kieryluk
• Card Text:
  Search your library for a card and put that card into your hand. Then shuffle your library.
  Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, add BBB to your mana pool.