The Avengers Vol. 1 (1963-1996) #374

Plot

In the nick of time, the Eternals arrive to pull the defeated Avengers out of the Hudson River! And after licking their wounds, Earth's Mightiest Heroes trudge back to their wrecked mansion to put together a plan to stop Proctor! In the meantime, Sersi remains unaccounted for and still virtually invincible! But surprisingly the enigmatic Proctor captures the enchanting Eternal and sets into motion his plan to destroy the prime reality! While across town at Avengers Mansion, Dane Whitman finally discovers who is Proctor's "template" in Earth's timeline! And a truly shocking discovery it is! Origin of Proctor. (mycomicshop.com)