He is the world’s most powerful being. The sole survivor of a doomed planet, he has made the protection of our world his life’s work. And though his never-ending battle for truth and justice continues to this day, one question has always haunted his shining legend: how would the story of Superman finally end? SUPERMAN #30 Originally published in September 1944 In the first appearance of Mr. Mxyzptlk, Superman encounters a mischievous trickster imp from another dimension.