Cornflower has been around as a magickal tool for a long time.  It's purported benefits magickally include enhancing psychic abilities, fertility, love, sex, and abundance,  The flowers are used to decorate alters and the dried flower is carried in sachets or amulets to attract lovers.  One entry states that you should sprinkle the dried flower on the right shoe when looking for a new lover.   For enhancement of psychic abilities it can be combined with other psychic herbs and drunk in a tea.  Possibilities include Anise, Bay, Borage, Calendula, Lemongrass, Lovage, Marjoram, Mint, and Oregano.  

Cornflower petals also make a wonderful mystical blue-colored handmade ink - which certainly has more magickal properties than store-bought for use in hand-worked spell books, etc.  To make an ink out of the flowers, pick enough to fill a coffee cup, packed moderately.  Using a non-metal container, boil 2 cups of water and drop the flowers in.  Boil until the water becomes a beautiful blue and has evaporated down to about enough to fill a small jar, such as a baby food jar - do pick a jar that comes with a tight-fitting lid, of course.  Using a strainer, strain the liquid into the jar.  Add 2-3 drops of vinegar to hold the color, and a pinch of salt to prevent mold over extended periods.  Shake lightly and keep in a dark area.  Use an old-fashioned quill pen or calligraphy pen at any point thereafter for making your entries.