There are none. At least, this is what is commonly believed. In the deep sense that all of them - centaurs, brownies, harpies, ghouls - once existed, but a very, very long time ago. And then they died out, were reborn, evaporated, and so on down the list. Who Then howls so alarmingly in the night, behind the window glass? Ringing and thin, with inhuman melancholy in the voice? Just like the full moon... And in this world there are also ancient Mirrors. They are so dull, as if cast from pure silver. You shouldn’t look in them for a long time, especially before going to bed...