The fairies, besides being vengeful, are also very arrogant, and allow no interference with their old-established rights

Get a raven’s heart, split it open with a black-hafted knife; make three cuts and place a black bean in each cut. Then plant it, and when the beans sprout put one in your mouth and say—“By virtue of Satan’s heart,And by strength of my great art,I desire to be invisible.”And so it will be as long as the bean is kept in the mouth.