The Avengers #79

"Lo! The Lethal Legion!"

The Avengers, including Thor and Iron Man, are searching for Black Panther, who was abducted by Man-Ape last issue. The Vision dons a human disguise and inquires with the Panther's various civilian contacts. The rest of the team try to learn what other villains are aiding the Man-Ape.

The Lethal Legion (the Grim Reaper's new supervillain team comprised of past Avengers foes) plot the next phase of their scheme: the Reaper sends Swordsman and Power Man to strike at the water main beneath Avengers Mansion, and the Man-Ape and the Living Laser to attack a nearby power station. After the villains all scatter, the Panther breaks free and alerts the Avengers to the villains' plots before battling the Grim Reaper on his own.

Goliath and Scarlet Witch enter the sewers to tackle Swordsman and Power Man. At the power station, Captain America and Quicksilver battle Man-Ape and the Living Laser. The heroes are all defeated and placed in a giant hourglass that will bury them in the sand forever. Soon afterward, Power Man arrives with a defeated Vision who is tossed into the mix as well. He also hands the Grim Reaper a file containing detailed information on the Avengers.

Upon reading the file on the Vision, the Grim Reaper freaks out and smashes the glass open, freeing all inside. He realizes too late that this was all was a trick and that the Vision had switched costumes with Power Man.

Once free, the Avengers make short work of the villains. The Vision then reveals that the file related the connection between the Vision and since Grim Reaper's (presumably) deceased brother Simon Williams, the one-time Avenger villain Wonder Man. The Reaper wanted to save the Vision as he was, in a way, a version of his brother.