Shazam Family Giant wants you to "Make Mine Mary Marvel"! Billy Batson's twin sister Mary is revealed to be the Shazam Girl, Mary Marvel! With the powers of six goddesses, Mary joins Captain Marvel and Captain Marvel Jr. as the World's Mightiest Girl! She battles Mr. Power, wicked witches, crafty cavemen, runaway holidays, time travellers, attacking aliens, cunning crooks, and the sinister Sivanas! 100 Big Pages!