Avengers Vs. X-Men Omnibus - Variant Cover (Hardcover)Earths Mightiest Heroes battle the Children of the Atom in a crossover so huge it calls for Marvels biggest ever Omnibus! Get the whole story of the Phoenix Forces return to Earth, an event that kicks off an all out war between the Avengers and the X Men! The X Men see the Phoenix as mutantkinds salvation, and the Avengers consider it a deadly danger. But what happens when five of the X Men are transformed by the Phoenix and begin to change the world?