Sadly, the best thing about this issue was that Giant Man uses a helicopter as a weapon. Also in this issue: A very brief FF crossover, where they bitch about what a pain the ass Hulk is…
This issue is mostly a Thor story–“Invasion of the Lava Men.” In it, Thor submerges himself in lava, and apparently his hammer can protect him. That’s why he can’t wait to send everyone home…
I suspect this is a one-off power, and one that won’t eventually be canon. Just like that super-breath he had in Journey Into Mystery #86.
Not one of Lee/Kirby’s best.
But, this was also the first issue with a letter page, and look at that first letter:
Yes, it’s a dumb fandom versus question! They date all the way to the beginning of Marvel!
Creators: Lee, Kirby