“The caves are nearly identical to the ones in her home world—caves she grew up navigating. And Avallen, like her childhood home, is wreathed in mist. It’s a thin place as well. Judging by all the mists in here, maybe Avallen, these caves, are an even stronger thin place than the one in the Fae world. The Prison—the court it had been before that … Vesperus said that she chose it originally because it was a thin place, good for traveling between worlds. Theia knew this, too. She must have told Helena.”
