The vestibule allows you to enter different worlds. You can look into the peaceful Nirvana, the abode of paranormal philosophers. Try to survive in the ship city on distant Dzuar. Take a walk through a rainy forest filled with monsters. But who will save the Vestibule itself from the face-changing Outsiders, the Tandradians hacking into space and the reapers coming in the darkness? Perhaps a knife master who has received Knowledge-at-Crossroads.