This issue was published simultaneously as a giant sized flip book under the title "Marvel Double Feature...The Avengers/Giant Man.
This issue has variants:
The Avengers [Quicksilver; Crystal; Captain America [Steve Rogers]; Black Widow [Natasha Romanov]; Hercules; Vision; Black Knight [Dane Whitman]]; Bova (guest star); Fydor (guest star); Taylor Madison (guest star); Augustine Jones (guest star); Neophyte (guest star); High Evolutionary (guest star); Marilla (guest star); Luna (guest star); Animutants (villains)
Synopsis
Quicksilver and Crystal visit Mount Wundagore where they find Bova is dying. Realizing that the High Evolutionary is once again at work on top of the mountain, Quicksilver decides to visit and ask him to restore Bova to health but runs up against the bestial Animutants.