Heroes will live, heroes will die, and the DC Universe will never be the same again in this omnibus collection of the 2005 event that changed history!OMAC robots are rampaging, magic is dying, villains are uniting, and a war is raging in space. And in the middle of it all, a critical moment has divided Earth's three greatest heroes: Superman, Batman, and Wonder Woman. It's the DC Universe's darkest day, and long-lost heroes from the past have returned to make things right in the universe... at any cost. Heroes will live, heroes will die, and the DCU will never be the same again!