I've not done a November contribution thread before and I might never do it again, but I've had fun digging up ideas for strange vis over the last few days and I'd be glad to share what I've written so far. These are sources of vis which are more than fuel for a single Art; much of this is based on the rules for Extraordinary Vis (Realms of Power: Magic, pg. 119) but I may just pull from all four Realms books for inspiration. I'll also take inspiration from real-world mythology whenever possible, unless an anachronism would be both A: caused by the Order of Hermes, and B: really funny.
I'll be doing themes for each week that passes, too. from November 1st to 7th, the theme is Minerals. Let's start with something medieval bestiaries inexplicably called a "stone"...
1: The King of Pearls
Vis: Creo Aquam, 1-4 (quality varies)
In the Eastern land of Taprobane, there lives a truly titanic oyster the size of a man’s head. On the first day of Autumn, this king of oysters opens its shell to absorb the chill morning dew. If the skies are clear on this day, their pearl’s luster is clear and it contains 4 pawns of vis which are Dedicated for Creo Aquam; if the skies are overcast and stormy, the resulting pearl is dull and contains only one pawn.
These grand oysters have been imported to Mythic Europe with varying levels of success. While Hermetic magic can provide clean seawater, the sun is beyond the sphere of Earth and cannot be counterfeit. On the other hand, sabotaging the pearl’s growth with a conjured storm cloud is a simple plan.