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if you set up the contrasts and set the hue/saturation to a dark blue color with low saturation.. it would give it a colder feel to it seeing as you are adding fog. Also, you can get some ambient forest sounds with a wolf howling in the distance.
There's alot you can do.. check out some movies or some Supernatural/vampire diaries/Goosebumps as these kind of scenes appear often.
Good luck ;)