Sorin, the Destroyer

X: Destroy target creature or planeswalker. Sorin the Destroyer gains loyalty counters equal to the destroyed permanent's toughness/loyalty.
-4: Exile all creatures. Exile X target lands, where X is half the number of creatures destroyed this way, rounded down.
-13: Deal damage equal to double the number of cards in graveyards to each opponent. Gain life equal to the damage dealt this way.