Sheret, the Discipliner

Flying, first strike
Whenever Sheret, the Discipliner attacks, put a
-1/-1 counter on each creature defending player controls. Whenever a creature affected this way
would die, put a +1/+1 counter on this creature.
The Matriarch of Clan Smith, Sheret is the one the
family depends on for everything. Any wrong is met
with swift retribution, be it an enemy, or even one of
her children. All will be punished accordingly.