Krona

Krona is a fictional comic book supervillain in the DC Comics universe. Created by writer John Broome and artist Gil Kane. Originally, the character was a member of the ancient extraterrestrial race of powerful, blue-skinned humanoid immortals from the planet Maltus. He first appeared in Green Lantern vol. 1, # 40 (Oct 1965). Krona was a Maltusian scientist obsessed with observing the creation of the universe, despite a Maltusian legend that said discovering that secret would cause a great calamity. Krona created a machine that allowed him to see into the moment of creation. Somehow, his experiment disrupted the process of creation, with terrible consequences. The exact consequences have been rewritten over the years; originally, it was the unleashing of evil itself in the universe; later, it was assumed to be the creation of the evil anti-matter universe of Qward. During the Crisis on Infinite Earths, it was also revealed to be the cause of the existence of all parallel universe in... full article at wikipedia