Fan Casting Krona in Green Lantern

Krona, a scientist of the powerful immortal Maltusian race, blue-colored humanoids from the planet Maltus (later known as the Guardians of the Universe), obsessed with observing the creation of the universe despite the legend of Oa that whoever discovered the secret of the universe would cause a great calamity, created a machine that would allow him to see the moment of creation. Somehow his experiment caused a disruption in the process of creation, with terrible consequences; the exact consequences were rewritten over the years: