The 18th floor of the underground city is a special place.
Like the 50th floor, it is a safe floor where no monsters spawn, and it is the first safe floor in the dungeon.
However, unlike the 50th floor, which resembles a grey wasteland, the 18th floor is known as the "Maze Paradise," similar to the Big Tree Maze and the Water Mysterious City, rare sights within the dungeon.
Here, there are boundless plains that seem just like nature itself.
There are broad lakes and forests located all around.
There is also an island situated in the center of a large lake, and right in the middle of a distant prairie, there towers a huge tree. The hollow in this tree is the entrance to the 19th floor, the Big Tree Maze. All of this is a spectacle only found in this paradisiacal place.
Of course, the most remarkable feature here is the ubiquitous blue crystals.