Jace, Existence Shifter

: Whenever a card enters an opponents graveyard from their library, look at the top card of your library. You may put it into your graveyard.
+1: Target creature cannot be blocked until end of turn. When it deals combat damage to a player this turn, Draw a card.
-5: Draw a card, then have target player put the top X cards of their library into their graveyard, where X is the number of cards in your hand.