Supergirl Vol. 1: The Killers of Krypton

Superman and Supergirl, the last two Kryptonians on Earth, have had their beliefs shattered. With new revelations about their home planet-and the man who destroyed it-Supergirl builds a star cruiser using whatever tech she can scrounge, and after receiving intel from Green Lantern, she blasts off into the cosmos with Rogol Zaar's deadly axe to solve the mystery!