Justice League of America #81

In "Plague of the Galactic Jest-Master," Hawkman and Atom journey to Thanagar in a desperate bid to cure the deranged Jean Loring, only to arrive as the planet falls under the twisted assault of the Jest-Master, whose madness-inducing powers unravel minds across the world. Written by Denny O'Neil and illustrated by Dick Dillin with inks by Joe Giella, this 1970 classic features a standout cover by Neal Adams, blending cosmic peril with the strange, unsettling edge of a villain whose laughter is a weapon.