very cool man, youre improving!
Here's some tips:
The cloak doesn't seem to curve naturally.
There should be highlights on the metallic things, (they have a sharper value curve), I would also expect much darker values on the front of the figure (I think that will also add to the mystery of the whole piece). But in the end, lighting stuff is your personal choice, you cause we artists don't have to always abide by the rules .
Good job on the moon and fog, but I think that with some reference for the clouds, you could've pushed it further.