At one point, this character existed in separate Red and Blue electromagnetic forms, but they merged to restore his original 
At one point, this character existed in separate Red and Blue electromagnetic forms, but they merged to restore his original form after they fought the Millennium Giants. A being created by Bertron was the only being to ever slay this man. After his death, figures such as Hank Henshaw, the Eradicator, John Henry Irons, and Kon-El attempted to replace him. Mr. Mxyzptlk ("mix-yes-pit-lick") created a red substance that causes his powers to go haywire. Metallo is powered by a green version of that substance, which under a yellow sun is his greatest weakness. For 10 points, name this defender of truth, justice, and the American way and Last Son of Krypton, who works for the Daily Planet as Clark Kent.
At one point, this character existed in separate Red and Blue electromagnetic forms, but they merged to restore his original form after they fought the Millennium Giants.
Superman [accept "Kal-El"; accept "Clark Kent" (either name) before it is read]