I'm not entirely sure if it's a widely popular light novel genre. Some light novels with rather extreme or edgy concepts like 'poisoning the world' can gain a dedicated following, but they often don't reach the mass popularity of more common genres. It could be that the nature of the theme is a bit too dark or complex for the general light novel reader.
Sorry, I can't directly recommend a 'poisoning the world light novel' as it's not a very common type that I have ready - made suggestions for. You could start by looking at light novel review websites. Some lesser - known or indie - published light novels might deal with such a concept. You may need to do some digging through different tags and categories related to dark or unusual themes.
Light novels usually had less words, usually between 1 million to 3 million words. Although the word count wasn't the only standard to measure the quality of a light novel, a small word count could allow the reader to finish the work faster and allow the author to better control the plot and rhythm of the story. Some of the best light novels even had more than three million words and reached more than four million words.
Poisoned novels usually referred to the appearance of certain plots or elements in the works that caused the readers to be poisoned or addicted to a certain degree. These elements could be fictional characters, plots, worldviews, etc., or they could also be music, pictures, sounds, and other elements in the work.
In the case of novel poisoning, readers might have a strong emotional resonance with the fictional world and characters in the novel, and even begin to imitate the plot and characters in real life to a certain extent. This kind of behavior could be reading addiction, game addiction, music addiction, film addiction, etc. It might even have a negative impact on health.
Poisoned novel is one of the common plots in fictional works. It can stimulate the reader's imagination and creativity, but at the same time, it needs to be read in moderation and used reasonably.
On average, a light novel is typically between 60,000 - 100,000 words. But this is just a rough estimate. Some light novels in the isekai genre, for example, which often have to build an entire new world, tend to be on the longer side, sometimes reaching up to 150,000 words. While others that are more focused on a single, simple concept or relationship might be shorter, closer to 50,000 words.
Since we only have this one line 'the golden word master read light novel', it's really hard to determine who this 'golden word master' is. It might be a self - given title by an avid reader who thinks they have a special way with words. Or it could be a character in an unheard - of fictional world where being a 'golden word master' is a significant role and reading light novels is one of their activities.