There are many types of dungeons in this world.
Some are filled with acidic poison; some are hidden in forests, while others are hidden underneath the ocean surface.
There are dungeons where thousands of monsters live, and there are also dungeons where only one strong monster resides.
Most dungeons have several floors, and the lower the floor, the stronger the monsters that reside there.
This isn't because strong monsters like living in dark and deep underground hell holes; it's because the stronger a monster, the stronger their intuition and intelligence.
Strong monsters who are in grade 3 or above can understand the benefits of hiding in deeper caves.
Ever since humanity conquered many races and became the overlord of the whole planet, they have been hunting and killing monsters like crazy.
Before humans, monsters roamed the land freely, and everything followed the law of the jungle.
