The situation was truly desperate: In the heart of a destroyed nation, with their friends captured, and their resources depleted after bravely fighting hundreds of Ultron duplicates against impossible odds, Captain America, Thor, Iron Man, Black Panther, and Firestar, were the only Avengers left standing to face "This Evil Triumphant", in Avengers #22. Written by Kurt Busiek and pencilled by George Perez, the last chapter of "Ultron Unlimited" was a great finale for a great arc, and the place for one of comic's greatest moments.
Just when an adamantium-built Ultron is about to kill the Scarlet Witch, Wasp, Giant Man, and Wonder Man, the walls come down behind him, to reveal the battered, tired, but triumphant Avengers led by the Mighty Thor, who delivers one of the coolest lines I have ever read in a comic book:
"Ultron, we would have words with thee"
Enough to say, the final battle ensues, and one by one, the Avengers hit the abonimation with the best they had to offer, until finally Hank Pym a.k.a. Giant Man, destroys his creation with the help of some vibranium rods courtesy of Avenger rookie Justice. This is another emotional and disturbing scene that makes "Ultron Unlimited" a must-read.