Dream Layer Twelve (adjacent to the final layer near Nightmare Town).
The complexity of this layer has peaked, still modeled after the interior passageways of a power station.
The spatial-physical structure is utterly chaotic, with various Penrose stairs and arbitrary doors linking the interactive spaces together.
An ordinary squad would quickly get lost within it; decrypting it could take days, if not a week.
However, the special squad that arrived here took only twenty minutes to observe and contemplate the spatial structure before analyzing the dream route with complete accuracy.
The one who finished the structure analysis was known as "The Dual-Faced Union - Marko and Martin," more precisely, it was "Rear-Face Marko" who accomplished this task; "Front-Face Martin" hadn't yet revealed himself.