Greetings! It is of some interest to note here that your current use of 'sigils' is very much like those used in Reiki...ie power symbols that now have attached vortices. The danger (and the usefulness) of said symbols is that they can be used by the maker as batteries to draw power from. The larger the popular use is the more power can be poured into the vortice. Such symbols can have an astral key or control which is known to the maker and/or the users so that they may 'tap' the vortex for energy when needed. There are other uses for the inventive mind. Group magic of witch covens and magic lodges use such devices. These can be classified (if one wants...) as astral machines. (IMG:
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