Fungus
The Game Government had already obtained detailed information about D07-013, and the fungi there must have been thoroughly studied. That was probably why the records were so comprehensive.
According to the records, District 013 was a place of dense rainforests and abundant waterways. Its land was scattered and made up only a tenth of its total area. Most of it was rainforest, hot and humid, and many areas were unsuitable for human habitation. On top of that, all kinds of fungi had evolved in abundance and at an incredible pace in this environment. In a handful of places, it was impossible to enter without a gas mask.
This showed the advantage of having scattered landmasses. The evolution of many fungi and mutant flora and fauna hadn't stopped just because the number of Players had increased. Their unchecked growth had allowed them to overrun many places that once belonged to humans, while waterways served as the best natural barriers.
The books about fungi alone filled a thick volume just with their Catalog.
There was no way to read all the books in a short time, so he chose to learn about the Poisonous Fungi and Strange Fungi sections.
The Poisonous Fungi section was easy to understand. It covered fungi with potent toxins—not just poisonous mushrooms that people generally knew not to eat, or metabolic byproducts produced by fungi growing in food, but a far broader and stranger range. Some could be seen with the naked eye, but there were many more that couldn't, making them even harder to guard against. After evolving, some could survive in extremely harsh conditions, remaining alive for a long time by traveling on the wind or clinging to tiny objects.
One entry described a highly toxic fungus called Fish-Eating Fungus. It could take up residence