Showcase: Regor of Uuz: 1969: The Menace of Bantor
by Dan Swanson, partially adapted from Superman #57, by Edmond Hamilton and Wayne Boring 
When giant robots from another world come to the planet Uuz for the rare and valuable mineral potassium, the only one standing in their way is the great hero, Regor. But as it becomes all too evident, this is a ruse concocted by Bantor, who holds the hero’s friends hostage. Can Regor put a stop to his arch-enemy’s plans without letting his friends get hurt in the process?