Fantastic Four (1961 1st Series) #36 GD
Published Mar 1965 by Marvel.
Cover pencils by Jack Kirby, inks by Chic Stone. Intro and first appearance of Madam Medusa (of the Inhumans) in The Frightful Four!, script by Stan Lee, pencils by Jack Kirby, inks by Chic Stone; Reed and Sue announce their engagement. The Wizard forms the Frightful Four and attacks the Baxter Building. The Frightful Four include Medusa, the Wizard, the Sandman, and Paste-Pot Pete. Brief appearances by the Avengers, the X-Men, and Spider-Man. Letter to the editor from comics artist Dave Cockrum. 36 pgs. $0.12. Cover price $0.12.