Atten Var, Tainted Shepherd

Flying
Atten Var enters the battlefield with two -1/-1
counters on it.
Other white creatures you control get +1/+1.
At the beginning of your end step, if Atten Var
has no -1/-1 counters on it, return up to one
target creature card with mana value 3 or less
from your graveyard to the battlefield.