Sorting door contain vestige of a servant who sorted the newly acquired subjects for the master.
The cell was inhabited by a subject who was blinded in an experiment by the master of the laboratory.
A large yard with numerous doors leading to different parts of the laboratory.
CN Haunt (a 50-ft. × 50-ft. yard with numerous doors)
Caster Level 5th
Notice automatic (the doors start to shake and rumble)
hp 10; Trigger the yard contains more than three creatures for more than 1 minute; Weakness does not affect creatures hidden from undead; Reset 1 day
Effects All the doors open, all the creatures in the yard vanish affected by mass invisibility for 5 minutes or until they attack someone (Will save against DC 20 negates the effect), and the door close loudly. As usual, the affected creatures can't see each other, making the scene look like if their companions where pulled into the doors.
Destruction All the doors at the yard have to be nailed shut using splinters of metal from chains and manacles that were used to bind the test subjects.
At this yard, the master and his minions split their test subjects sending them to be held or processed in the various parts of the laboratory.