Writers Jim Shooter and David Michelinie and avenging artists George Pérez and John Byrne bring you the Avengers at their best! And it begins with the cosmic "Korvac Saga" - co-starring the Guardians of the Galaxy! Possessed by the Power Cosmic, Korvac seeks to create a utopia on Earth. His godlike power may mean the end of the Avengers - and everyone else on the planet! Then, bookending this volume is "The Yesterday Quest" - a storyline with deep revelations for the Scarlet Witch, including her first encounter with the evil power of the Darkhold! In between, new heroes join the team, battles with the Absorbing Man and Count Nefaria will shake your fillings, and you will see why the Avengers will forever be called Earth's Mightiest Heroes! Collecting AVENGERS (1963) #167-188 and ANNUAL #8-9, and material from AVENGERS: THE KORVAC SAGA TPB.