Supergirl, of earth

Flying, Doublestrike, Protection from white and green and black, Lifelink, Cant be countered.
When supergirl enters the battlefield each opponent gets 1/1 green kryptonite creatures with reach, defender, Deathtouch only supergirl.
Supergirl can only be removed from the battlefield by a kryptonite creature.
I kara-zor-el have learned to protect this world with my life