Superman #7/1980

In "Die Eissklaven von Killerfrost!", Superman is called to the S.T.A.R.-Laboratorium to thaw out the icy criminal Killerfrost—only for her to seize control with a chilling kiss, enslaving the Man of Steel. With Professor Knudson and Cliff watching in alarm, only the fiery might of Feuersturm, born from the fusion of Prof. Stein and Ronnie Raymond, can stand against her frozen fury.

When a criminal secretly swaps Supergirl’s cape to study its mysterious properties, he quickly learns it resists every attempt at analysis—leading him to try selling it to a gangster boss, with deadly consequences. With Linda Danvers, Jason Janson, and Mr. Wells caught in the aftermath, the true nature of the cape’s power begins to unravel.