Krona is a supervillain appearing in comic books published by DC Comics. Publication history Krona first appeared in Green Lantern Vol. 2 #40 (Oct. 1965) and was created by writer John Broome and artist Gil Kane. Fictional character biography Born on Maltus, Krona is an Oan, scientist who became obsessed with observing the origins of the universe itself, despite an ancient legend that said discovering that secret would cause a great calamity. Krona constructs a machine that pierces the temporal barrier and views the beginnings of time itself. Krona catches a glimpse of the hand of creation depositing the speck that would become the entire cosmos. His machine explodes at that instant, and the universe is shattered causing the creation of the Multiverse as the universe replicates into an infinite number of parallel universes. At this same moment, the Anti-Matter Universe is created, unleashing evil into the cosmos; thus, the Monitor and the Anti-Monitor are born. As punishment for this act, Krona is transformed into pure energy by his fellow Oans and is sent to forever wander the cosmos. Krona's actions are what caused the Oans to become the Guardians of the Universe. Krona returns to a physical state using the energies of Alan Scott's mystical power ring, but is again turned into his energy form by the Guardians. Krona is finally restored to his original form thanks to Nekron—who gained additional power due to the anomaly of an immortal entering the realm of the dead when the Guardians kill him—and attempts to kill all of the Guardians, only to be narrowly defeated by the weakened Green Lantern Corps. Krona later resurfaces as the manifestation of Entropy itself and battles the New Guardians. Cross-universal threat While trying to discover the secret of universal creation, Krona destroys entire universes, eventually arriving in the Marvel Universe. There he confronts the Grandmaster, who, in an attempt to save his own universe, informs Krona of the existence of a being in the Marvel Universe who has witnessed the Big Bang. In exchange for Krona not destroying this universe, the Grandmaster and he will play a game; two teams, one from each universe, seek out 12 items of great power, six from each universe. Should Krona's team (the Avengers) win, Grandmaster will give the knowledge Krona seeks to him in return for not destroying his universe. But when Grandmaster's team (the Justice League) wins—thanks in