Fan-favorite creators Kurt Busiek and George Perez usher in a new era for Earth's Mightiest Heroes! Since the team's inception, the Avengers have always defended humanity against the forces of evil. When duty calls, these legendary champions answer, fighting valiantly until justice prevails. But what happens when their oldest foes strike directly at the team? On the eve of a huge Avengers gathering, an attack by the evil enchantress Morgan Le Fay sends these assembled heroes into a strange medieval reality where nothing is as it seems. Held under Le Fay's thrall, the Avengers have lost all memory of their true identities. Breaking free of Morgan's spell, Captain America and Hawkeye must fight to free their teammates before the Marvel Universe is altered forever! Plus: The Avengers take on the Squadron Supreme!