Firstly, disregard any reviews from readers who havent read more than 30-40 chapters. They dont know that much about this novel to write in the first place.
Anyway, this novel is a light to read novel. There are no complicated plot lines or reasoning behind the characters. The story is simple: How to kill the heroes of the past using the greatest murderer of mankind, supported by the greatest black wizard and greatest white wizard. And oh, those 'heroes' they are overpowered as f*ck.
Before I detail about the adventures, let me just say this. Names are overly simplified. The protagonist is mostly called the Murderer. The enemy heroes, or rather the sidekick of the hero called 'The Braves', are called by their positions or role in the hero's team. Such as Warrior, Summoner, and Theif. Thats their literal names and how most characters are reffered as. If you can manage through the ugly naming system, then you may find nothing else that's problematic.
Back to our storyline and characters. To the reviewers who complained about the female 'love interest' of the MC, about how shes ditsy and annoying and overly kind. Of course, she's the Saint for christ sake. That's her role. And her actions of being ignorant/innocent is just a defense mechanism for reason that you readers will fond out. As for the MC, before anyone complains that he's too unemotional or too bland, of course he is. He doesn't have a 'heart' (funny how his skill is called Heart of Gold), that's how he is a genius who acts not because of emotions or anything. He is more likely to act as a robot than a human because that is his character. So dont expect him to feel, or cry or act as a human, because he isnt one.
Most of the beauty in this novel is how powers are utilized and explained. Unlike other stories where skills are used as is, in this story the abilities are explained in full detail (but not in battle, this is not Bleach) and the uses are novelty. For example, the MC's skill is heart of gold which allows him to buy anything, so what do you think the genius MC will do with this lame ass, low power, non-combat skill? Well, one example is how he planed to buy 1 million gallons of water to make a volcano explode, or buy buildings in the stratosphere to be used as meteors. You will find in this novel that skills and damage are not the most important thing in a battle, its the brain that matters, especially when the enemies are overpowered AF (the warrior is immortal, the summoner can reflect anything and almost everything, the thief can stop time and see the future, and the hero can alter reality and the laws of physics).
This is a short novel, less than a hundred chapters long, but you will find that most chapters are worth the read. The characters are simple, the plot is simple, the writing style is simple, but the details in the fights and story never lacks, and it all adds to a relaxing read that still manages to keep you on the edge at times and reaching g for the next chapter.