A pale fox, white of fur and red of eye, that lurks between reality and dream, showing up in nightmares to feast upon the fear of mortals, then appearing in their waking lives to inspire deeper nightmares. They also eat the eggs of chickens, which they pass whole and leave rotting, only to hatch into new sionnach olc. They can appear much larger and more frightening when threatened. They are kept by goblin communities as symbols of their priests.