The Marvel Super Heroes

The Mighty Thor #13 - Molto, the Lava Man; Invasion of the Lava Men; Living Rock (1x61)

: 24, 1966

When a race of underground lava men threaten the surface world with destruction, Thor gathers his Avenger teammates in an attempt to thwart the attack. The group is aided by an unlikely ally, their former team member, the Incredible Hulk.