Superwoman Vol. 1 Who Killed Superwoman? (Rebirth)

Imbued with the powers of Superman, Lois Lane and Lana Lang pledge to use their powers to protect Metropolis as Superwomen! The only problem is their new powers are killing them, and neither one knows how to stop it. Can they survive long enough to uncover the deadly secret of their new foe, Ultra-Woman? Collects SUPERWOMAN #1-7.