Sorin the Mirthful

+1: Put a -1/-1 counter on target creature. That creature gains lifelink until end of turn.
-X: Reveal the top X cards of your library. You may put any number of cards among them with mana value X or less into your hand. You lose X life.
-7: Exile target players hand and graveyard. Create a 1/1 black vampire knight creature token with lifelink for each creature they own in exile.