From a purely mood perspective, this might be my favorite of the bunch. For me, it really evokes some of the surreal/horror artworks I've seen, like from H.R. Giger or the like. There's a really strong feeling of symbolism that gives the piece a sense of heft.

Thanks for arting!

At first I thought those were actually skulls of some sort, but skulls don't have cutouts through them like that, so instead I (agree with Bachi and) see this as a symbolic landscape of some sort. After looking at it for too long, I'm still not sure what that figure(?) in the foreground is supposed to be – I could be just not getting it. Also interesting to note that the shadows seem inverted – the areas that are "lit" are shaded.

The inverse shadows are curious, especially as the skulls themselves have their own diffuse shading. The angles of the ‘shadows’ also suggest that the ‘light’ source is close by; just over the hill and not on a far horizon. The piece breaks the usual expectations of a landscape in unsettling ways.
The ambiguity of the foreground figure adds to the sense of unease. A creepy sketch, thanks for creating it, Artist!

The Shadows Retrospective Here

>>GroaningGreyAgony
>>KwirkyJ
>>Bachiavellian

Thanks for the comments! I did the initial sketch for this in a somewhat frenzied haze, and ended up liking the mood of it enough to try to expand on it better. It's certainly not very realistic with the skulls being hollow or the shadows being inverted on the ground, but those things just felt right to the mood I was making and I had a lot of fun doing it. It's been a long time since I did something with a ton of pencil shading, or really drew in pencil at all, and I'm actually still happy with it. I'm glad this prompt inspired me to do something, and this drawing inspired others to write!