"There is only one, as a Witch cannot share a title, and her name is Lambdadelta." She pronounces it as two greek letters slurred into one word. "Her powers govern the likely, the probable, the inevitable, the 99% chance. Mine govern the black swan taking flight, the million-to-one chance, the virtual impossibility. The Miraculous."

She smiles. "There are other Witches with other purviews, but Lambda and I are counted senior among their ranks."