Venoxryu, Sinister Dragon

Flying
Other creatures you control have Evolve.
All creatures in your graveyard have Scavenge {b/g}{g/u}{u/b}.
Whenever Venoxryu or another Zombie you control attacks, you may put two -1/-1 counters on target creature.
Whenever Venoxryu or another creature you control enters the battlefield, you may put a -1/-1 counter on target creature.