Right, I'm going to be frank about my initial impressions - I'm iffy about it. I open the doc, and all I see are some tentative mechanics for how this thing is going to work. No history, no role in the overall story, no background, we don't know where this new enemy faction comes from, in what locations they can be found, what they are, what ties they have to the world at large. The names and monsters all feel more like they came out a cyberpunk/steampunk magitech setting, rather than the one that Savin's set up.
My suggestion is for you to go back and flesh out this enemy faction and the backstory of your sentient weapon, how it ties into the setting, maybe reflavour things so that it fits better into Bronze Age Scandinavia. It might very well save you a lot of wasted writing down the line. I would also strongly suggest you come onto the Fenchat Discord to work things out in real time.