Sabine, Demolitions Expert

Whenever a nontoken artifact an opponent controls leaves the battlefield, put a +1/+1 counter on Sabine, Demolitions Expert.

Whenever Sabine, Demolitions Expert attacks, you may exert her. If you do, destroy target artifact on opponent controls with mana value equal to or less than Sabine, Demolitions Expert's power. Then, Sabine, Demolitions Expert deals damage equal to
her power to target creature an opponent controls.