The Magic Mirror, from the fairytale of Snow White. Owned by the villainous Queen in the story, it was the all-knowing mirror.
Also a passenger in room 301 of the Dream Cruise.
This information was gleaned from Mad Kangaroo, when he was trapped and saw Li Changhe.
The first abnormality that came to his mind was the Magic Mirror from 301.
This is human nature, after making a regrettable decision. The first thing that comes to mind is regretful thoughts like 'if only...that would be nice'.
Unfortunately, there are no ifs.
As for the Magic Mirror, if it's really all-knowing like in the fairy tales, that indeed is a being worth contacting.
Li Changhe put the Bird Beak Mask back on, sparkled the space in his hand and took out the Magic Bullet Shooter Rifle. Together with Little Red Riding Hood, they left room 409.
On the fourth corridor, Li Changhe scanned the hall, many people who had noticed movement on the fourth floor were giving him wary and dodging looks.