Jace, Mind Banisher

+1: Target player exiles their hand. At the end of the turn, return those cards to their hand.
-3: Target player reveals a non-land card from their hand and exiles it. As long as that card is exiled, you may cast it using mana of any type.
-7: Target player exiles the top cards of their library until one card remains. At the end of the turn, return those cards and shuffle their library.