"A Skrull Walks Among Us"
The Skrulls have engineered a new weapon to take on the Fantastic Four. The Super Skrull possesses all the powers of the FF combined and then some, as he is sent to Earth. He claims the planet in the name of the Skrull Empire and immediately takes on, and defeats each member of the FF.
Reed pulls the FF back to come up with a plan as he discovers the true power of the Super Skrull is being beamed to him from the home world. Reed creates a jamming device and then lures the Super Skrull to a deserted island for the final battle.
Sue slips the jammer on the Skrull and then lures him into a giant crater where Johnny seals him in, ending the threat of the Super Skrull.
First appearance of the Super-Skrull.
Reprinted in Marvel Collectors' Item Classics #13.