Invisible to the naked eye Meyda-marks subsist so long as the Soul or False Soul which created them maintains the Strand which binds the two. The Meyda-flow required for this is extremely low, even those with untrained Soul’s can maintain dozens of Meyda-marks without truly noticing a dip in the amount of Meyda they can process during Meyda-work.
Meyda-marks are used primarily in spells who’s information target’s something vague or abstract. If one preemptively marks the target with a Meyda-mark, and incorporates said mark into the Meyda-work, then the targeting becomes explicit and efficient. This is exceptionally useful in the case of combative spells if you have been able to mark your opponent before the battle begins. The spell is altered from being used like a bow and arrow, to that of a String and Hoop.
Meyda-mark’s have historically been used to invisibly guard against forgery. The Master Cruthmen of Daurk Brionnaigh have been using Meyda-mark’s for over a thousand years to ensure their work cannot be effectively plagiarized. Their Meyda-mark’s involve complex patterns, difficult to replicate without a guide or trained hand. A similar type of mark is used in the underworld and among the political elite to ensure a messages deliverer is who they say they are.
Variable Complexity
The mark itself can be as simple in pattern as a single open circle, or as complex as the Meyda-work of Fractalworkers. The decision ultimately lies in the mark’s purpose. Those used in targeting for spells and Meyda-circles are often a balance between simple for ease of use, and complexity for unique identification. The more complex the mark the more difficult its incorporation, but the more likely the targeting will succeed.