Royal Mausoleum 4F Hidden Room?

[elithiomel]

On Royal Mausoleum 4F, there is a hidden room reachable after completing the archive quests. You teleport there by interacting with one of the book stands near the entrance to the floor. Inside the room is a “Mysterious Cube” which, when interacted with, says “…x” where x is a random number from 1 to 6 inclusive…

Does anybody know what the cube does??

[Goldie]

Nothing apparently (at least at the moment).
People have been trying for months on every versions, and no meaning to it was found yet.

[elithiomel]

Ah thanks. I couldn’t find anything definitive, and it seemed to me to be a joke by the developers.