Iron Man #51

In "Now Strikes the Cyborg Sinister!", Iron Man faces his most relentless foe yet as the mechanical menace Cyborg Sinister unleashes a brutal assault with a weapon that could shatter even his armored defense. Written by Mike Friedrich and brought to life by George Tuska’s dynamic art and Vince Colletta’s sharp inks, this 1972 classic showcases Tony Stark at his most vulnerable—pushed to the edge by a foe whose very presence redefines the limits of cybernetic warfare. The cover by Tuska and Colletta captures the clash in stark, high-octane detail, a 20-cent snapshot of a battle that would echo through the Marvel Universe.