* The elves. They're sadistic {{Eldritch Abomination}}s that [[MindRape manipulate the thoughts and emotions of mortals into worshipping them]] and feed off the pasts and futures of other universes because their own is nothing but a barren eternity of ice and snow.
* Take the Dromes, monsters that look like humanoids made of dough which kill people by trapping them in dreams...Tiffany speculates that if a drome got into the real world it would make your life a living nightmare, warping the way you see the world until you want to die. And then she thinks "[[ParanoiaFuel I wonder how many have got in already and we don't know?]]"
** Which makes it recursive NightmareFuel AND ParanoiaFuel.
** We also find out that they aren't even native to fairyland, the Queen found them useful so she essentially kidnapped and enslaved ''the entire race''. One that finds itself in a dream it likes immediately stops being hostile, suggesting they are driven by raw terror at their surroundings as much as anything.