Vaal Hazak,The Corpse Dragon

Flying,Menace,Deathtouch
Whenever a creature you control dies trigger the following abilities:
Miasma Breath-Creatures your opponent controls get -2/-2
Effluvial Drain-Whenever two creatures die choose the combination Vaal Hazak absorbs the power
you gain life off of toughness
Apex of the Rotten Vale He who Consumes all and Decays in its Wake