I rated this three stars because of the effort that was put into producing a book. Producing 600 pages is not a simple thing to do; therefore, it's fairly impressive.
However, effort alone is not substantial enough to make a book good. Good is subjective, but to me it means planning out a story that is actually going somewhere and characters that are interesting and a world that is interesting, but nothing is really interesting in this book. The character is boring and the magic is okay, I guess. I don't really care about that.
The next thing is the character is so special. I mean, this man gets something super rare in the multiverse, like what ?
Yes, characters can have unique things, but not like the way this character has special things. It just makes me feel like he's the chosen one or something, and I really don't care for stories like that because there is no tension. You know they're going to win just because they have some unique item. Yes, it's the main character; obviously they're going to win, but I don't want to think that while I'm reading a book. I want to feel tension, but there is no tension.
Also, I would never recommend this to anyone since this is not a story; it's just something with some concepts and some fighting; there's no real main plot or anything; it's just mindless action, and I wish the author would spend more time writing an actual story.