Supergirl #28

Back from the future, Supergirl is ready to keep her impossible promise, despite the horrors of the world she just left. And to bring a miracle to life, she must enlist the aid of the last DCU hero you ever expected to see again - one who's supposed to be dead! As if that clue will help you narrow it down!

Image: Supergirl #28 - DC Comics

Supergirl #28