Writer: Gerry Conway (1986) and Keith Ian Giffen and J. M. DeMatteis
Artist: Luke McDonnell (1986) and Adam Hughes
Publisher: DC Comics (1986/1998)
Includes: Justice League of America Vol. 1 #247-254 and Justice League America Vol. 1 #37-40
Despero was a scrawny kid (alien ruler) who got sand kicked in his face (freedom from his dictatorship) by a bully (The Justice League of America), but with the help of the Charles Atlas work out plan (the Flame of Py'tar) he got buffed and kicked their ass! In one such ass kicking...
Clipped from Wikipedia: ...the battle ended only through Martian Manhunter employing a one-time, never before seen application of his telepathy to trick Despero into thinking he had successfully killed not only the Justice League, but all life on Earth, causing him to let go of his hatred and regressing to the form of a fetus.
WHAT! WHAT! You read that right! He killed EVERYONE (or thought it) and was so happy turned into a fetus. A fetus...HAHAHHA...OK!
Clipped from Wizard Magazine: