Challengers of the Unknown #56

A towering warrior clad in elaborate Aztec-inspired armor dominates this 1967 DC cover, swinging a massive weapon down toward members of the Challengers of the Unknown scrambling desperately below. The sheer scale contrast between the giant figure and the yellow-suited Challengers gives the scene a real sense of danger and urgency. Bob Brown's cover art captures that thrilling pulp-adventure spirit that made Challengers of the Unknown one of DC's most imaginative titles, and the story title "License to Kill!" promises plenty of action within.