dnmc - not a single, artificial light source. Though it's obvious, you used a spotlight to light the rock and, unfortunately, the foreground too, half of the scene is lit by natural light. In addition, there is nothing really sharp and the sky is full of jpeg artefacts. The plants colors looks unnatural too and crop/composition are uninspired.
Just think...not really a single light source! You have a light on the rocks but the "starlight" is showing also...which is a natural light source so I'm giving you a 1 for DNMC....
.......just kidding....great work....and I know how hard it is to get a good shot of the sky while getting some detail on the ground...8 from me. 10 if it were a little "crisper".
Various highlights and shading in the face of that cliff don't seem to bear any relation to moonlight, not the apparent shape of the stone, which is disconcerting to say the least; it makes it look as though it were variously lit with about ten different lights, whereas I'm fairly sure it's just processing. Nevertheless, its quite an intriguing image, and presumably successful to your aims.
I'm having a really hard time voting on this image. It is gorgeous, but I can't figure out how it is lit. Where is the single artificial light source? I'm giving the benefit of the doubt and voting an "8".
Dude, it says on the rules that you should "use a single, artificial light source to dramatically light the subject of your choice. I'm giving you the benefit of the doubt anyway.