Save the world, destroy the world - it's all the same to him! When a flawed demigod decides it's his destiny to perfect the universe, it will take the combined might of the Avengers and the Guardians of the Galaxy to stop him! Plus: Earth's Mightiest Heroes face additional endangerment from aliens, Atlanteans and automatons! Guest-starring Captain Marvel, Ms. Marvel, Dr. Strange and more! Collecting AVENGERS (1963) #167-168 and #170-177; and THOR ANNUAL #6.