Shortly afterward, Kara set forth on Earth-Two to become the heroine known as Power Girl. Elseworlds 2000 All the men in the world, except Superman and Lex Luthor, die. This resulted in the reappearance of Earth-Two and everyone that was from that Earth, was transported there. With some quick thinking from Huntress, Kara defeats him by feeding him a live nuclear warhead. Invulnerability: In the New 52 it has been shown that Kryptonians under the yellow sun aren't entirely invulnerable. Weaknesses Power Girl has the same Kryptonite weakness as Superman, except that she is immune to certain types of Kryptonite.