The Last Void is where Last Planes are. Its voids only contain Last Planes or Itself. When These voids are smaller than Transuninfinite^^^^^^^^Transunfinite, they are contained in a bottle. If they are bigger, they are contained by itself until they are contained by a shelf, but usually these repetitions occour in steps.
Only one in every 50 voids are directly on a shelf, and the reason they're on the shelf is because Bongus knocked over one of his bottles and void spilled everywhere, taking up the whole shelf
