Avengers (1963 1st Series) #307
"Metamorphosis" Part 3 of 3. Script by John Byrne. Pencils by Paul Ryan. Inks by Tom Palmer (finishes). Cover by Paul Ryan and Tom Palmer.
In the nick of time, the Invisible Woman, Mr. Fantastic, and Wonder Man arrive to stabilize Hydro-Base atop the massive column of lava rock! Jarvis and Avengers Island are safe for now, but deep underground the situation is anything but safe for the septet of avengers battling Jinku's giant lava beast!
