Sigils can be used to draw down the gods, to call spirits from the otherworld, and raise up ancestors from the underworld. They are also used to leave offerings specific to what spirit or deity the sigil is aligned with. Sigils don’t just belong to the realm of ceremonial magic like those shown in The Key of Solomon and other ancient and not so ancient grimoires. Their use for magic has been found in preChristian Northern Europe, in Africa, and in Asia. Today outdoor immpermanent sigils are still found in use in Haitian Voudou as veves to call the lwa and in the sand mandalas of Buddhism and Hinduism.
Sigils drawn with powders are miniature maps of the cosmos and doorways to access specific points in the other realms. Most of the designs involve the use of an intersection of some sorts to represent crossing between worlds via the axis mundi also known to many as the World Tree. The rest of the design can be elaborated upon and created in the moment to match the deity or spirit being called or the realm being accessed. The best places to draw outdoor sigils and leave offerings at them are crossroads (especially dirt ones), graveyards, the foot of trees, or around a staff or stang driven into the earth. If you wish to use a sigil to leave an offering of food or drink make sure to draw it somewhere with earth and not a paved street as you’ll need to dig a hole big enough to bury or pour your offering into.
There are many different materials which can be used to draw sigils outdoors. It is best to use natural biodegradable ones no matter what – especially if you will not be destroying the sigil. Traditional materials include powdered white eggshell, corn meal, wheat flour, powdered barks, sand, and red brick dust. Even the material used can correspond to the sigil to be drawn. Drawing a sigil is itself an act of magic that can induce meditation and trance – think only of your intent as you lay out the design pinch by pinch of powder. Once drawn invoke the spirit or deity with a song, chant, or original invocation and commence with your intended working. Leave your offering in the centre of the sigil – whether it is alcohol, a lit cigar, food, incense, or fresh flowers.