Mr. Mxyzptlk app.
Swan was a house artist at DC working on titles like Tommy Tomorrow, he began gravitating towards Superman and his related books, Superboy, World's Finest and Jimmy Olsen, he would eventually leave DC thanks to his personality issue with Editor In Chief Mort Weisinger. He would eventually return and go on to be the artist that defined the look of Superman in the Silver Age, eventually becoming the editor of the title, but after thirty years of keeping up standards of all things Superman, Swan was given the boot in favor of John Byrne's Superman reboot, Swan's comic work began to taper off after this dismissal and he eventually retired, but will forever be recognized as the Silver Age Superman's finest artist.
James Noel Mooney was an American comics artist best known for his long tenure at DC Comics and as the signature artist of Supergirl, as well as a Marvel Comics inker and Spider-Man artist, both during what comics historians and fans call the Silver Age of comic books. He sometimes inked under the pseudonym Jay Noel.