The Megastructure (originally chou-kozoutai (超構造体?)) - These are large plates that lie between levels of The City and are made out of an unknown, nearly-indestructible material. They are part of some kind of major isolation system between the gargantuan floors of The City. Attempts to approach the megastructure result in a massive safeguard response so as to prevent trespassing. Bypassing the safeguard is pointless, as it is nearly impossible to even scratch the megastructure. Only a direct Gravitational Beam Emitter blast is known to have been capable of tearing a hole into a megastructure.