I have heard the plane known as the "Macrocosm" mentioned. All I know of it is that it exists outside of the conventional boundaries of the multiverse, is home to the chososion, and since the chososion are only seen in the Inner Planes the Macrocosm is likely most easily accessed from there. The name "Macrocosm" suggests the possibility that the Macrocosm could be a "larger" representation of the conventional multiverse. Since "larger" means nothing in regard to that which is infinite, [insert several intuitive leaps] it seems possible that given its relation to the Inner Planes, which are the building blocks of the larger multiverse, that the "Macrocosm" could be a "representation" that the rest of the multiverse was based off of; though what this entails is unknown.
Anyone else have any ideas or further knowledge of the Macrocosm?
My theory was that the Macrocosm was where the Ethereal Plane touches the Far Realms, which the Far Realms are 'the outside' of the Multiverse and are a collection of planes rather than a single plane.