Van Kor, The Vengeful

+1: Create X 1/1 black vampire creatures with lifelink, where X is one plus the number of creatures your opponents controlled that died this turn.
0: Until the start of your next turn, Van Kor, The Vengeful, becomes a 5/5 vampire creature with flying, trample and indestructible.
-7: You get an emblem with "Creatures you control have annihilator 1. If it already has annihilator from another source, increase the value by 1.