It’s a rather unusual question, one I had honestly never considered before, lol. As an archetype, though, I feel it is incredibly powerful because it embodies slow transmutation — true alchemical work — along with invisible growth, the kind of magic that acts quietly beneath the surface. It carries ancestral nourishment, the memory of the Earth itself, and a sense of genealogical continuity, since it is passed down, divided, and multiplied over time.
Sourdough starter is cyclical by nature: it is fed, it rests, it grows, it renews itself. For this reason, it can become a perfect symbol either for breaking a cycle or for initiating a new one, very much in resonance with the Wheel, the Major Arcana.
I will try to create a manifestation for a new cycle using the Wheel as the central archetype and a bit of sourdough starter as the element of Earth. Perhaps under Jupiter — I’m not entirely sure why, but I strongly feel a connection between this energy and him.
Let me know how things go, I do my work in the same areas so I'm very curious. I'll be doing my own tests with this soon, probably to start I'll try a meditative process as I'm caring for the starter. I'll figure out the best way to use it in kitchen magic and manifestations from there.