Seraphina, Angel of Death

Flying, protection from green, unleash (You may
have this creature enter the battlefield with a +1/+1 counter on it. It can't block as long as it has a +1/+1 counter on it.)
The plasma cannon on her right arm puts a swift end
to those foolish enough to raise her ire. One look is
enough to know that mercy is not forthcoming, as this
angel of death brings judgment from on high.