The Lost Area is an underground place and the center the Second World. It is also the place where is located a chip called the Underbalance, controlled by the Grand Master, the computer that controls the system of the War time and the Second World.
Description[]
Three keys, also called as Parasite Keys is required to open the door of the Lost Area. It is also revealed that the Professor Eisuke Mito is in the Grand Master, in other terms, the computer itself that controls the Second World.
Known events[]
It appears officially in the episode 33. It is opened by Seredy Kreisler by the three Parasite Keys.
In episode 34, the final battle between World Union and World Saber is announced by Seredy Kreisler.