A horror story from WEB OF MYSTERY #7 (Ace Magazines, to be found here) springs to mind:
"Mark of the sinister cat":
Ross Bridger visits a balkan land and a spooky castle. There he meets Chorta, a she-devil who can transform into a cat. Chorta wants Ross to be her prince of evil. Ross escapes but is followed to the United States. In a showdown on a stormy night he can kill the cat with a magical dagger.
But it's a magic cat...