Cosmology Explanation. Very rough diagram showing the structure of the Hierarchy of the World of Witches. Umineko follows higher dimensional theory depicted by "endeavors", steps on an infinite ladder that leads to the realm of the Creator that transcends all lower layers (and is in itself, layered).
Umineko consists of a metaphysical evolutionary journey of being from where all beings are placed somewhere between two poles: The side that creates fate, and the side that follows it.
Dimensional Tiering
Higher layers (from which the lower reality is seen as fiction) and physical higher dimensions are not the same things Higurashi
Hanyu's Game
Like Lambdadelta, Bernkastel was a piece to a great witch on a gameboard Beatrice's Fragment
Game Board
Beatrice's World is a higher dimensional construct consisting of a plethora of pocket worlds Witch's Theater/Heaven/Bernkastel's Game Board
Bernkastel's gameboard is massive higher dimensional structure that dwarfs even Beatrice's own in sheer size Aurora's Study
Where Aurora resides whilst observing the Umineko story City of Books
The largest structure shown The Sea of Oblivion/Depths of Oblivion/Abyss of Nothingness
When erased, destroyed or conceptually denied Realm of The Creator
Not only does this realm consist of several layers