I did something like this by diving deep into seizures and gut disorders and eventually found myself researching ancient Sumerian herbal remedies. Found out they used to use FMT to treat a 'curse' in Ancient Babylonian . Sure enough, an FMT fixed me.

I took some pills full of magical powder and was blessed by Inanna after taking on a dog's spirit to rid myself of a curse upon my bloodline. academic.oup.com/brain/articl...