Sarah Stonehope

{t}If Sarah Stonehope does not have any Magical Secrets counters, exile up to 4 Instant and or Sorcery spells from your graveyard and place 1 Magical Secrets counter on her. Otherwise, you may cast any one spell exiled through Sarah Stonehope but it is exiled if it would be sent to the graveyard this turn
When Sarah Stonehope leaves the battlefield return all cards exiled through her to your graveyard.