Graverot Wanderers

Graverot Wanders enters the battlefield tapped.
When Graverot Wanders enters the battlefield
target creature gets a -1/-1 counter on it.
Whenever Graverot Wanders die or leave the graveyard draw a card and
each opponent loss two life.
{b/g}{b/g} Return Graverot Wanders from the graveyard
to your hand if one or more creatures died this turn.