The Unknown

The Unknown is a mysterious place with staircases leading to various rooms. You feel that this plane was once used for some very important purpose. There is a library, a vault, and what appears to be some sort of auditorium. Then there is an invisible staircase leading to a mysterious portal. What was the purpose of this place? Will the original dreamers that met here come back and claim it?

The Unknown is inaccessible to dreamers under fourth sphere.