I read this online as a serial publication but it seems pretty clear where the books were divided up. In this first book a human soul is trapped in an experimental dungeon core pieced together from bits of other dungeon cores. A magician did this so he could have a dungeon core to run and repair his brand new magic academy.
Here is the headline: Read for yourself and make your own decisions. For me, personally, this was a one star book but I feel like at least some of that is personal to me and that the author does a good job writing, just not for me. I suggest you take that advice and skip the rest of this review since next I will be mentioning what did not work for me in this book.
First is the amazingly slow story telling. The author frequently tells interactions from multiple points of view so you get to re-live every conversation, fight, etc. two or even three times. And yet, even with this over-development, there are parts of the story that aren't convincing. Primarily I'm talking about the internal fight the MC has with the remnants of dungeon minds. I never found this convincing and the way it is described it seemed like the MC should have never have been actually inconvenienced by them at all.
Next is the MC, who is remarkable slow to come to terms with reality. The MC finds himself in a "might makes right" situation where the bad guy is a racist (speciesist technically) murdering rapist who the MC just [SPOILER] LET'S HIM GO. The MC justifies this as being worse for the bad guy but WHAT ABOUT THE PEOPLE THE BAD GUY IS GOING TO RAPE AND MURDER BECAUSE THE MC LET HIM GO????? (At what I'm guessing to be the start of book 3 we actually find out that this bad guy did in fact continue to rape and murder BTW.)
The author also has a secondary MC, Nanya, behave ridiculously stupidly. In a world where might makes right she first allows the bad guy to take away an insanely powerful weapon and does nothing about it. Why? Because the 132 year old Nanya was upset at being betrayed by the bad guy and apparently has daddy issues. BUT WAIT, IT GETS WORSE . . . Nanya has, for some insane reason (mommy issues), bound up most of her power. Again, she did this in a world where the strongest can rape and murder whoever they want since people like Nanya do nothing to stop them. BUT WAIT, IT GETS WORSE . . . Nany hasn’t unbound her power in years and the longer since the last unbinding the longer it takes to unbind her powers. So knowing the bad guy is on his way to the magic academy does Nanya take an afternoon and unbind her powers just so they are more readily accessible? NO. SHE BACIALLY WAITS UNTIL SHE IS IN COMBAT TO SIT DOWN AND ATTEMPT TO UNBIND HER POWERS RESULTING IN HER BEING SIGNIFICANTLY WEAKENED WHEN LIVES ARE ON THE LINE. Just moronic.
Bottom line: For me this is was not an enjoyable read but it does have its good points so perhaps others will be able to enjoy it.