Hi Revast,
Thanks for submitting the beginning of your novel. I can tell that you're a confident writer, and I can appreciate your gritty prose. You did a great job of setting the tone, and setting up your anti-hero. Killing him was a surprise, and that was certainly the highlight of the chapter.
Consider doing a grammar / ease-of-reading pass on your writing though. You were missing some commas, and some of your sentences felt overly dense. I'm all for descriptive prose, but I choked more than once on some sentences and had to go back to read it.
I agree with the others who said the first few pages didn't feel very engaging. Sweaty balls aside (the first mention was fine. The second was too comical), there's a lot of sitting, talking, swearing, and
internal thinking.... but not much else. There were a lot of names and references to things we have no idea about yet. I was a little frustrated by that and kept wondering why I was confused: was I just dumb, or were things intentionally not being clear?
Maybe I personally tend to be hyper-sensitive to this, but I noticed that you mentioned a Creator, putting people "to the question", and a war that has gone on for Ages and Ages. You're treading on commonly used Robert Jordan terms there. Unless those terms are important to your world and story, just consider alternative terms.
You mentioned a Creator, and later Brauv mentions "gods". That's fine. I just want to point it out in case your getting your pantheon mixed up.
I am always interested in a good magic system. And I love mages / magi. It appears as though your magic system links magic and blood. My initial knee-jerk reaction to that is "Eh, okay, that's cool. But I feel like it's been done before." Check out NAME OF THE WIND By Patrick Rothfuss. While it's not specifically related to blood, the magic system in there frequently has characters draw their own blood in order to use their natural body heat to power spells. Also, I can't think of a specific example, but somehow I get the impression that magic and blood being linked to one another is not something that's new to the genre.
After the explosion, it felt a little unrealistic to have Brauv talking so much considering what he just went through. The fact that he survived at all is tough to grasp (especially if the explosion fried people's eyebrows off a good distance away), but I understand that its good for the chapter to have him get a few more words in. Consider sticking to a few words though. He was pretty lucid and articulate for a mostly-disintegrated chunk of flesh. ;-)
So despite my tough constructive criticism, I see some good potential here. If this is, as you say, the end of the book, then that's pretty neat. It's always a gamble to show how a main character dies before we know their full story, so I'm looking forward to seeing what you do with it. I hope we see an interesting character arc for Brauv, rather than having him be a flat-asshole character the whole time.
I'm looking forward to chapter 1 and beyond. Good work!