The Dungeon of Niflheim was currently home to 15 floors -excluding the floors 5.5 and 10.5- and all but the final floor was fully stocked with environments and expansions. However only the top ten floors were in use by the public given that no one had ever reached beyond the tenth floor -bar the team from the federation of knowledge. This was primarily due to the vast sums of C-rank monsters prowling the halls.