"The New Iron Man Meets the Angel!"
The Angel from the X-Men gets caught near the test detonation of a nuclear device by Stark Industries. The exposure to radiation turns the Angel evil. The X-Men appeal to the Avengers for help, but it is Iron Man who feels personally responsible and sets things straight in a daring sky battle with the Angel.
Reprinted in Giant-Size Iron Man #1.
"Tales of the Watcher: The Saga of the Sneepers"
First Tales of the Watcher.
Reprinted in Marvel Collectors' Item Classics #3.