The MC is garbage who wants to get his love interest pregnant and for her to service him forever. His advisor is the devil who wants to ruin the girl's life and goes as far as to say if she get pregnant with the mc/rapist baby, getting rid of it is murder to scare her. Shes says to a just recently s*xually abused high school girl. She has her past to explain her actions, but it just makes it worse.
The translator insists that you find the rape victim to be the bad guy eventually, maybe he's right, not because someone told me it had nothing to do with the rape victim but rather her father, but so what that wasn't the case?
If this was a revenge story where the MC rapes girls who physically and mentally abuse classmates, teachers, family and who get away with it, that would be a good story. Still evil and unacceptable in real life, but a good story. Not this. Its just a wimpy kid who gets to rape his crush which gets overlooked by future heroines who come one after the other.
Whatever the ultimate reasons for everything is, the wimpy MC raped and repeatedly rapes a girl because she was his crush and was worried her new boyfriend would take her virginity. And as someone points out in a review he doesn't love her. Just her body, and its like at best. He gets a harem of girls super easily who willing want to be with him and are better looking, but he just has to rape this girl over and over again. And it gets video taped and pictures taken by the devil advisor who laughs and laughs.
I can't say this clearly enough, so I wrote a review. The characters not being raped or wronged are the scum of the earth. No excuses. This has set a whole new low for the Japanese culture I grew to love and its popular just shows how messed up the world is. If this had a bad ending for the MC I might have endured by telling myself it was just fiction, but seeing as its 1300+ chapters and is ongoing, I can't expect such a ending. Some of you might say it just the one girl and MC improves as a person, but so what. I like Dragon Ball Z, but if Goku raped a girl over and over again as a kid I would never had watch it.
Author also has a odd outlook in rxxx and women. In the first mission, MC's group see a man forcing himself on a woman, and they all react by blushing and turning their heads for half a minute. You would think this group who can kill would have a better reaction. When they finally do chase the man away, the girl follows him, saying she's a weak girl who knows her place. This was all not even 24 hours after the apocalypse of this world.
The evolution works like this. You kill a monster and acquire Strange Energy/Qi/Experience in one small part of your body. You begin at level 0, and you collect energy to level up. As you level up, which is hard to do, you gain energy for strengthening the body and unique personal skills, and a mutation, starting from a part of the body like the hand, foot, head or chest, and grows as you level up.
Those with strange enery are called black iron warriors. There should be silver and gold after iron, but we have yet to get to it in the translations.
Also, power leveling a large group is impossible. Why will be revealed later, so don't question why don't they do it.
There is also a interesting twist to the evolution factor I've never seen done before where it explains why just by entering a fantasy world you can suddenly gain all these mystical powers. To support this rapid power of evolution and super powers, your life force gets drained rapidly. From the moment you become part o the KGGD system and gain powers you have three months to live. The first two months you don't notice a thing, but during the last week or so you begin to rapidly age and experience agonizing pain the makes you beg for death. The key to avoid this is to either acquire items to compensate the loss of life force, Time Money, or make a contract with a fallen God type creature who will suspend the loss of life force, although if it dies all the contractors will die as well. As one character described it, "Once you embark on the path of evolution, you either succeed and evolve, or die".
Some reviews talk about how unrealistic it was that the MC couldn't learn magic from threatening or buying someone off. They are right to think so as I did once, but it's complicated. Especially when he absolutely needed secrecy. And even if he did threaten someone it's impossible he would reach the level he needed to. He needed to reach the top 0.001% of magic users in a impossible time frame where as the few geniuses and fortunate who reached such a level took decades. And bringing a companion has risk since it is the demon king, so there is a high chance they would die even with our OP MC there. And as later chapters state, if he brought his magic teacher who is strong enough to kill the demon lord with magic, the demon lord would spot them and do everything in his power to kill the helper. The demon king may evenchoose to flee or resort to more drastic measures to survive, so it's impossible to bring a helper if you think about it.
There is also something readers like to complain about. He had a daughter not his own by blood pushed onto him by some woman. The MC appears to be aware from the start that she isn't related to him by blood, so he wasn't tricked like some suggest, but for currently unknown reasons he bonded with the daughter and his reason for fighting and saving the world is for her. I don't get why, but lots of people bring this up. Some even in the reviews which is stupid. We don't even know the full story as of yet.
It gets boring. K gets strong enough to cruze through 5 man raids alone along with the hidden bosses. And I know for certain the ending was rushed. To complete MHK to a satisfactory conclusion would require at least 300 chapters, but it ends in the 180's. And because by 160 we aren't even near where K died in his first timeline, we can assume a lot of things get skipped and brushed over in a shallow manner. K has only met 3 of his former final 10 comrades by the 160's, so don't expect much.
And even as the author redos the final chapters for English readers it doesn't get better. The author has no intention of fixing his rushed ending, only expanding it which is even more insulting to us readers.
And why so many reviews about water and ice magic being different is strange. Has no one seen a novel, game, or anime where that happens? Ice is usually seen as an advance level of water magic or fusion of like water and wind, so why be bothered? It's stupid.
After 17 volumes the main character Zheng had the following:
Intermediate Qi, Volume 1.
Vampire Baron, Volume 1.
Progressive Knife, Volume 3, bought for him and lost in volume 8.
Red Flame Blood Spell, Volume 4.
Nameless Movement Technique, Volume 7, could have gotten earlier in Volume 4, plot hole.
Advance Qi, Volume 9
Chaotic Unity Qi, Volume 13, not mentioned past Volume 14.
Tiger Soul - Sword, Volume 14, upgraded in Volume 17.
May not sound like a few things, but remember its 18 volumes and the store ends at 23.
He gets the Book of the dead in the Mummy. According to its description it contains dozens of black magic spells where you only need 1000 points to learn a spell, or if you know the language you can exchange them for free. The main characters don't do either vety much, but it doesn't matter. Latter in the story they barely use it, and the author changes it to that you actually need the Book to cast any spells at all. Well, thinking about it having the book to use spells isn't that bad, but still mad they barely use it.
They later get the Golden Book of Revival from the Mummy. It's original description was the Book contains multiple spells and not just revivals, but the author only writes them using it revive comrades.
The MC Zheng gets the Spear of Osiris. It's incredibly powerful, but he forgets to use it. In a latter volume the Author wrote that if you infused refined energy into the Spear it grows ridiculously powerful even with just a small amount, but not only did the MC only try doing so in the middle of a battle when just before he took almost a year to do self training, he forgets about it later.
They also get the scorpion king bracelet which can summon undead soldiers. It's a great item that's barely used even when having extra fighters around would help a lot.
The MC obtained The One Ring. It has the ability to refine energy or convert it to another type of energy. The MC only uses it to refine energy, completely not considering the various ways to use any other type of energy.
First Stage that bestows combat instincts is okay.
Second Stage physical and reaction speed buff is okay.
Third Stage skill copy is okay, but is later weakened and rarely used in combat.
Fourth Stage is game breaking. Its like going from level 1 to level 100, and destroyed the idea one needs to train and challenge themselves to become strong. In one instance it allowed the MC to rival a much, much stronger player who reached end game stage enhancements and who is the embodiment of talent and hard work.
Its original explanation was pure genetic manipulation, where you just adjust your mutations and body to suit the user, but the more we learn the more stupidly broken it is. You don't even need enhancements in a sense long as you reach 4th stage. The story actually shows one character without enhancement reaching the fourth stage and having strength to rival the MC in some ways. It even gets more broken as it allows a MC who never trained his magic to gain high level magic powers outside the system.
Around volume 14 his plot armor kicks in and any guess he makes ends up true even without evidence. In addition he makes Zheng look bad. They would originally have conflicts over plans and methods, Zheng is the human side of the argument and Xuan is the extreme logical side of it. It was interesting to see them contrast with one another which is good writing, but then author writes Zheng to be a spineless bitch and Xuan ignores rank and acts as leader whenever he likes. And people allow him to do this because it's too hard to think for themselves. Xuan also lies or stays quite for no reason. He may give a reason, but I can argue and win against him.
He also gets actual power plot armor latter on. Xuan somehow without going through much danger reaches the fourth stage. It stupid since he only experienced 1 minor battle and 1 major battle after unlocking his constraint.
The male and more dominate half. After learning martial arts from a god (While rare they aren't so few that it's impossible to meet one) that can only be learned by someone with dual processing he becomes extremely strong despite having weak Qi as he hasn't cultivated yet and later its shown his cultivation speed is below average, so for now he is only relying on his frightening sword skills. And when I say strong he isn't god tier or close to it, but is strong enough to challenge and beat people above his cultivation level to a extent which is very impressive. Has no talent for magic, yet may possibly have some for dimensional magic. Also his body repels seals, so he is OP against seal masters.
The less dominate half. The author goes back and fourth if she is just Tyre in a female body, or develops her own identity by living as a girl, but it mainly reads as seeing herself as male so far. Has the same talent with the sword as Tyre, but because of her lack of combat experience she developed slower than her male half. But unlike her male half she had OP potential for magic in all areas to varying degrees except dimensional magic, and so becomes a duel practioner. And as opposed to her male half she cultivates Qi much faster, to the point she worries the balance of the two bodies will break one day.
Its my personal opinion, but because there are things like Lunaria has the same talent for the sword, but falls behind Tyre due to a lack of combat experience even though they are said to have one mind, leads me to believe they both the same yet still individuals. If they were the same then so long as their isn't a physical or spiritual problem, like how Tyre isn't physically/spiritually compatible with magic, Lunaria should be just as skilled in the sword as Tyre even without fighting as much since she should have his/her combat experience. Lunaria even learned Tyre's sword skills from his memories, yet the combat experience didn't cross over. This leads to the conclusion while they share knowledgeable and memories, personal experience which form their own identity won't pass over.