"Hmm, so this is the prototype version? No wonder most of it is still undamaged even though this place is more than two millennia old…"
Once he opened his eyes, Neo found himself standing in a gigantic hall made up of silver-white marble with various ancient designs made on the floor and the walls in gold.
'Pure gold is used to make carvings on the floor and walls; moreover, silver and mithril have been used as materials to create this building...'
Silver and gold aside, the mithril needed to make all this alone would cost an immense fortune, and that's not even the most expensive thing.
Neo glanced all around him, and he noticed the presence of an invisible magic circle carved on these walls and the floor.
This magic circle is not only strengthening them but is also blocking any sort of mana fluctuation.
In other words, even an SS-rankers mana detection will be ineffective inside this place, and only a small area can be detected.