read the following lines from Poe's "The Raven":

"Doubting, dreaming dreams no mortal ever dared to dream before."

Which poetic device Poe use in this line?

Alliteration.

The poetic device used in this line from Poe's "The Raven" is called alliteration. Alliteration is the repetition of the initial consonant sounds in neighboring words. In this line, the repetition of the "d" sound in "Doubting, dreaming dreams" creates an alliterative effect.