I'm enjoying your writing style a good deal; you have good control over your style, and you know how to use inverted and cumulative sentences. I would probably recommend considering thinking about some variety in the rhythm of your prose--the longer descriptive sentences in the first and third paragraphs would benefit from sometimes being broken up, pacewise, by a few shorter one-clause sentences or short additive sentences. That will give the bravura sentences you are writing here more punch. You actually do this in the sixth paragraph really well--the pacing of the sentence structure is quite good there.
This looks like tons of fun so far. I can't wait to play it! It's so vivid, and you are hitting the theme perfectly.
My only large-scale comment is about the smartness of entering an active, magical battlefield to loot the dead. It seems like a pretty bad idea on the face of it, and considering that one of the two options looks like you'll choose *not* to do that, perhaps you could acknowledge, in your penultimate paragraph, that this could be unwise?
The muscles of the left arm always tighten when you sleep as phantom pain from your amputated hand is a frequent visitor of the night.
Meaning, I assume the wrist part of the arm tightens? Or is there some other aspect of phantom pain that involves tight muscles that I don't know about? I couldn't 100% picture how the tight muscles and phantom pain connected.
Minor stuff: "The plain west of the city is a battlefield." -- I would reword that to avoid a misread of "plain west" meaning "ordinary," which is how I read it twice. Maybe "The plain, west of the city, is a battlefield."
Not sure about "flashes of light spring to life" followed by the "taken up grudges"--something about that feels like a mixed metaphor, of the light suddenly born, but also having been dealing with long-simmering hostility. Maybe it's me.
"With all the chaos...flying about" hits my ear oddly.
Typo: Has the endless war found it's way here? (its/it's)
moderately sized --> moderately-sized
built such wonders --> build such wonders