Ailene, the Whisper

+2: Ailene, the Whisper becomse a 3/2 Human Assassin creature with protection from target player until end of turn that's still a planeswalker.
-3: Exile target creature or planeswalker, its controller investigates twice.
-7: Scry 12. Exile the top four cards of your library, for as long as those cards remain exiled you may cast them without paying their mana cost.