To influence and control the plant kingdom is the task of the twenty-fifth head of the Moon sphere. He reveals to the magician all the mysteries of life, of sprouting and growing, and shows him how to master this kingdom by moon magic. The magician is then able to accelerate, or to stop growth at will. Following the instructions given by this head the magician is able, by the help of moon magic and by applying cer- tain quabbalistic words, to make fertile in a supernatural way a whole field, no matter how large it may be, or, vice versa, to make it infertile and change it into a desert.