DOCTOR STRANGE (1974) #65

Strange stands off against an unusual threat—while protecting innocents and scrambling for his own survival! A chariatan is performing some shows as a magician. What he doesn’t know is that the spells he used to summong are real and that for years he’s been calling Pohldahk, a demon of Nightmare himself. When Doctor Strange discovers he tries to stop the show, but isn’t able to do it before a horde of demons enter our world from Pohldahk’s spiritual plan. At the end Strange succeds and send every demon back.