A tribute to Neal Adams......Killraven was born in the alternative Earth-691, sharing his timeline with the Guardians of the Galaxy. While his Earth was attacked by the Martian Masters most of the superheroes removed themselves from the struggle seeing it as impossible to win. As the Masters took over the world, men not used as breeders or collaborators were trained and forced to battle gladiator-style for the Martians' amusement; women were used as breeders to supply infants, eaten by the Martians as a delicacy. It was in the gladiatorial pits that Jonathan Raven earned the name of Killraven. Killraven was created by Roy Thomas and Neal Adams and first appeared in Amazing Adventures issue 18 (1973).