Vaal Hazak

Deathtouch, Menace
Infect
Effluvium Gas-Creatures you dont control get
-2/-2, whenever a creature dies put a +1/+1
counter on this creature and gain life equal
to the number of -1/-1 counters on that creature
Effluvium Siphoning-{b}{b}{b}{b}{t}Destroy target
creature with -1/-1 counters on it