In the hour astride midnight, the corridors are completely dark. This is the assassin's hour, spiritual reflections of political killers stalk the halls. At this level, Assassin Umbrood are divided into ideological camps, not nations. The cabal is an unknown element, so the spirits try to ascertain their affiliations. Taking a side is extremely dangerous, as the other factions will temporarily ally to eliminate the side with the "unfair advantage"
Of course, clever characters will realize that in Latin, Nowhere is Utopia. The assassins respect characters who declare this affiliation. Naturally, regardless of their side, they're the Real defenders of that principle. They can lead the characters down the correct corridor, though they all swear that it can't be found at midnight.
Nevertheless, it's there-and it's the only time that it appears.
The Utopian hallway is dusty and cobwebbed with the work of tiny, sickly Pattern spiders. No Umbrood will follow them. At the end of the hall is an ornate set of wooden doors, inscribed with the rose and cross. When opened, they lead to a hill surrounded by what appears to be French countryside. Below the blazing Red Star and ringed by seven walls, the White Tower of Languedoc glitters in the astral night.