In chapter 18, the demons of the 36 decans appear, with names that sometimes seem to be conscious distortions of the traditional names for the decans. The decan demons claim responsibility mostly for various ailments and pains, and they provide the magical formulae by which they may be banished. For example, the thirty-third demon is Rhyx Achoneoth who causes sore throat and tonsilitis and can be driven off by writing the word "Leikourgos" on ivy leaves and heaping them into a pile.