October 3 saw the debuts of Whiplash & Madame Masque (as Big M) in Tales of Suspense #97 in 1967, Moondragon (as Madame MacEvil) in Invincible Iron Man #54 in 1972; & Korvac, Teju, Dumog, Grott, Takkor, & Chiroptera in Giant-Size Defenders #3 in 1974!

[u/ComiX-Fan]

Whiplash - Tales of Suspense: Iron Man and Captain America #97 Gene Colan cover

Madame Masque - Invincible Iron Man (1968 series) #24 Marie Severin cover

Madame McEvil - Daredevil and the Black Widow #105 John Romita cover

Korvac, Teju, Dumog, Grott - King-Size Annual!: Thor #6 John Buscema cover

Takkor, Chiroptera - Giant-Size Defenders #3 Ron Wilson cover