“The Invasion of The Lava Men!” – (23-page story) – The Lava Men try to push a giant ‘living rock’ to the surface of the earth, where it will explode and destroy all human life, leaving it free for the Lava Men to inhabit. The Avengers intervene and the Lava Men fight back. The ‘living rock’ is only destroyed when, by chance, the Hulk arrives on the scene.
The Avengers then lure the Hulk to the only part of the rock that is safe to hit without it destroying everything. With the Hulk’s extreme power the rock is destroyed with no damage to the Earth. The issue ends when the Avengers receive a condition-red signal from the Teen Brigade.