It is also possible you are asking about the (specifically the card named "Arei" or cards depicting similar archetypes), as "Symbolon" is a famous psychological astrology deck.
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A correct plan allows future owners or electricians to safely locate and repair circuits. Core Categories of AREI Symbols It is also possible you are asking about
Ritual use involves drawing a sequence of Symbolen Arei on water-soluble clay disks, which are then placed in running water—allowing the “sentence” to dissolve as the forces disperse into the world. symbolen arei