The Fugitive Doctor (Surge Foil) (WHO-735) - Doctor Who Foil

When The Fugitive Doctor enters, investigate.
Whenever The Fugitive Doctor attacks, you may sacrifice a Clue. When you do, target instant or sorcery card in your graveyard gains flashback {2} until end of turn. (You may cast that card from your graveyard for its flashback cost. Then exile it.)