The best way to describe this novel for me would be, a more bloody, gory and dark version of konosuba.
The main character reincarnates in the body of the current guild leader of Invictus, a member of the Medusa race, and with some fragmented memories of his new body. And he has only a system ( with no personality or system store with stupid quests, thank God) to inform him of the names of the people around him, and there status and hostility level. And apparently it can analyse and copy the skills and abilities of other people and creatures...?
I love the character design of this novel, the characters in this novel feel more 'alive', the enemies aren't evil for the sake of being evil, they each have there own personalities, with there own motivations, ambitions and dreams.
There are however some problems, for example, the lack of explanation of how the power system works, how magic works, the difference between the races in this world, etc...
Like, it's fine if everything isn't explained to the last detail. But at least having a more detailed explanation about the race of the main character, the Medusa race, and about is strength, like, sometimes he looks super powerful and other times weak, tho he looks more like an assassin for the most part, maybe that's why.
One thing in this novel is the, sometimes, excessive pov change, like, you can pass 5 or more chapters following the other characters going throught aventures and life or death battles, finding love, etc... . And you start wondering if the main character started hibernating or something.
Don't get me wrong, the pov changes aren't bad and are very good even. It's just they are to God damn long, and when one ends, another starts. And that can be very frustrating, especially when you what to know the background and abilities of the main character.
All in all, it's a great story. :-)