Rauh Civilization utilized kidney stones for magic.
This started when someone on the Smoughtown Discord had mentioned the possibility of Marika's village being a family of Dryads (Credit to Mangolovers for this observation). I went on, further claiming that they were likely inspired by the Hesperides; Greek Dryads of The Golden Evening. in Roman texts, they're noted to be the daughters of Hesperus. In other sources they're said to be the daughters of Atlas. (completely aside but possibly useful info: Atlas is claimed to have invented the "Celestial Sphere" which supported their understanding of being "fixed upon a starry sphere.")
Hesperus is the "Evening Star," or the planet Venus as seen in the evening, and the brother of Atlas. Hesperus was often confused with his brother Eosphorus, aka Phosphorus, the "Morning Star," because they were both represented by the same planet. Phosphorus translates to mean "bearer of light." (this phrase also translates to "Lucifer," which is also known for giving the gift/curse of knowledge to humans)
In the Ruins of Rauh, we begin to find Spirit Calculi. A Calculus in the biological sense, is a stone, like say, a kidney stone. The Spirit Calculus is noted to smell bad and give off a white light. The stench is supposedly a sign of a strong spiritual presence.
Kidney stones are compound crystalline masses typically comprised of calcium-phosphate; Phosphate just being an ion of Phosphorus.
Phosphorus, in Alchemy, is the element that can harness Light itself. I imagine a crystal stone of calcium-phosphate would be much more controlled and manageable as a substance than pure phosphorus, which would just combust upon contact with air.
Following this line of reason, I believe the Ancient Meteoric Ore Greatsword (or the Amogus as i lovingly call it) is not Obsidian as ine might expect, but a massive chunk of Iron-Nickel Meteorite that contained veins of Schreibersite.
Schreibersite is a rare earth mineral that's currently understood to be an original source for life on earth, and the precursor to "Pyrophosphate" which is a key ingredient in the production of ATP; a chemical considered key in the existence of life. (Pyrophosphate as a name could also be superficially broken down into "fire-light-spark" as well, which i feel is appropriate)
The Amogus was a weapon of very old gods, who perhaps recognized the power and usefulness of Schreibersite..
Or perhaps, It's possible that these old gods were borne of the meteor itself, and veins of Schreibersite created concentrations of Pyrophosphate which coursed across their bodies?
Consider, the wild life-giving power of the Crucible's source traces back to Rauh, and the first Crucible Knight is there to make that clear. I believe new life borne of the Crucible, began to try and imitate the old gods which granted them life. The Rauh would learn to extract this lifegiving power from their own bodies as they began to learn/realize ways in which their bodies contained remnants of the source of their gods' power; from harvesting bones, to possibly contracting/passing kidney stones as a manner of ritual practice.
This information and the stories revolving around Rauh civilization have been nearly completely lost to time, even if the original ideas were expanded upon and simply lost their roots, or accidentally rediscovered through other means-- There's already a hermit we meet in game, who has rediscovered forbidden magic all on his own, wielding copper heads on a stick as a flail.. who's to say that harnessing lost magic doesn't come to the odd person serendipitously or through deep independent research like this?
but allow me to go even further, just to solidify some aspect of this idea from within the game
While doing a bit of the usual, initial perusing of wikipedia pages as one does.. i noted something deeply peculiar; a poignant phrase with its own little section: "Hesperus is Phosphorus"
this boils down the entirety of Goldmask's quest. Goldmask was trying to use "a priori" knowledge to understand a flaw in the logic of the Golden Order, but he's an outsider looking in. It is only when the Tarnished comes to him with new, empirical evidence that he begins to understand what is happening. you use the literal Law of Regression on a statue of Marika to understand that "Radagon is Marika," and this tidbit of information is something that aligns with what Goldmask was suspicious about. he points at the Erdtree, not knowing the solution to his problem, but knows what variable is throwing his solution through a loop. giving him information that confirms his views, reinforces his perspective.
HAHAHA
PYRO, PHOSPHOR, "-ATE" IONIC CHARGE
RECLUSE USES PYROPHOSPHATE MAGIC
















