When I flipped the Hourglass, I saw a large owl-like creature appear out of nowhere on level 0. It had some weird slot machine looking thingy where it's stomach would be. It had some Japanese Kanji that I do not know.
Im safe now, Im writing this post from a cafe in Level 11.
Whatever you do, do not bring an hourglass to Level 0.
I did not take a picture, but if anyone, including MEG wants a sketch, let me know.
Here is a quick sketch.
Side note, I think time passes quicker when near this entity. Apparently, I started my experiment 2 days ago in front rooms time.