Here's an oddity. We have here almost an all-Jim Mooney issue. Mooney had drawn the Robin feature in STAR SPANGLED for ages and the occasional BATMAN story as well. Not sure if he had ever drawn a solo SUPERMAN at this point. The story is written by one Jerry Coleman, forgotten today but a pretty good SUPERMAN writer in his day. Basically, crooks are using these ancient alien pseudo-life forms to drain Supes' powers one by one until he finds the way to stop them.