Fantastic Four #170

In "A Sky Full of Fear!", the Fantastic Four face a new kind of threat when Reed Richards engineers a high-tech exo-suit to let Ben Grimm temporarily regain his strength and mobility—only to find the suit’s power source is tied to something far stranger than science. Meanwhile, a mysterious force behind Power Man’s violent outbursts sends shockwaves through the team’s trust, leaving them to question who—or what—is manipulating events from the shadows. Written by Roy Thomas and drawn with dynamic precision by George Pérez and Joe Sinnott, this 1976 classic features a cover by Ron Wilson and Joe Sinnott, capturing the tension with a striking image of the team in crisis.