Fantastic design work. The font, color choices, layout are all superb.
I appreciated that this was all straight to the point, with no unnecessary fat. I liked the artefacts you provided, especially the idea of Shadowbane being able to sever shadows. It was nice you provided images for each of them in a separate PDF.
If I ran this I think I would try and add some traps or puzzles to some of the rooms for a bit of variety. It's already a very usable dungeon though.