What mood does the setting of the raven create

Melancholic perhaps.The narrator is sad because of the loss of his beloved one.He tries to concentrate in reading to forget his sorrows but he cannot.He is alone.Loneliness after such a loss surely indicates nostalgia and melancholy .there is a lamentation also so the mood is gloomy as usual in Poe.

- "is not only a luminous passive watcher in the night sky, but it is a powerful force.

it does symbolizes love,   lust   and dreaming and is seen as a power symbolic force that determines and affects human behaviors and reactions.

in the context of the question it does remain you that he events are only taking place at night and the reader of the passage of time."

it the climax in the poem