Bella runs into her a bit later, accompanied by a bright-eyed Red Dwarf. "This is Teggin and he says the castle is magic," she reports.

The dwarf bows.

"The Witch couldn't rule from here because it wouldn't let anyone in while there wasn't a legitimate ruler to be had, and the dungeons are inescapable if we find any extra Witch's creatures who we want to lock up, and the whole place is self-cleaning which is why there weren't great snowdrifts' worth of dust everywhere even though it's been empty for a hundred years."