 He first appeared in "Justice League Europe" #15 (June 1990), and was created by Keith Giffen, Gerard Jones and Bart Sears.Originally, it had been thought Dreamslayer was simply a robotic version of a previous living entity, like his comrades, but it turned out he was real, or at least his mind was.As part of the group, Dreamslayer killed most of the people on Angor, his alternate Earth.