[Lady, That’s My Skull] [original; page from #169; cover of Wonder Stories] Apparently swiped from a classic science fiction image, drawn by the great pulp and sci-fi artist Virgil Finlay for the reprinted S.S. Held story, “The Death of Iron” in the 01952 Wonder Stories Annual.
(Update: The great Skull post above originally credited Marie Severin as the renderer of the first interdimensional fanged mouth, but Neilalien’s Agamotto Eye spied a fanged mouth in another dimension with a mystic path passing through it in Strange Tales #116, “Return To The Nightmare World”, by Ditko.)
Also from that Skull post: Neilalien likes: Let’s start calling the mid to late Strange Tales Dr. Strange run “Ditko Unleashed!”
Dan Adkins page from Doctor Strange #169 shown to be a swipe!