So, I like the story. I can't see my final rating so I derive this from my notes:
Enjoyment: 3-4
I'm a Khorne War fan, so you got me there. Short cool snippets from the various battlefield encounters (thumbs up). The part with the weapon selection book and the glyph was not for me. It felt a little to hack & slash computer game. Maybe that was the goal? Just my opinion and personal preference here. It took me a little out of the immersion.
Originality: 3-4
Live die repeat was not so new. But to be fair, I also struggled a bit to make something matching the theme that was not derived from something.
Theme: 5
I found the repeating live, kill, die sequence captured the infinity loop very good. One question thou. In Second last part, it indicates that the demoness is in her last "weapon" cycle? Did I read that correct?