Dark Seance

Each player puts the top 7 cards of their library into their graveyard.
If {u} was spent to cast Dark Seance, put an instant or sorcery card from your graveyard into your hand. If {b} was spent to cast Dark Seance, put a creature card from your graveyard into your hand.
If {b} and {u} were spent to cast Dark Seance, exile Dark Seance and target graveyard.