It's very difficult to delve into the Mirror Hall, but leaving it is quite simple—you just need to think in your heart 'I want to leave', and after at most three spatial shifts, you will return to the entrance.
This is also why it's called Mirror Hall, and not the Mirror Maze.
Once they left the Mirror Hall, Aiwass set up a ritual to summon the Moon Deer, Arnold.
They didn't have the Dreamworld Navigator, so they had to rely on the Moon Deer to stabilize their crossing through the cracks between dreams. However, with Arnold's true name, this was not a particularly difficult task.
But what surprised Aiwass was...
—The summoned Moon Deer Arnold turned out not to be the Playful Sky Department, nor did it recognize them.
When it spoke, it still had that sharp voice like a jester, but it wasn't as manic and excited as the 'Moon Deer Arnold' when it left earlier. Instead, it spoke softly, deliberately, just like how they were before the Shadowy Celestial Marshal before setting off.
