"Yeah, I know about genes," Saturday says confidently, coming from a world that's figured out that much science, at least. "Where does your original body go? How do you not get confused and end up with like, bits of other bodies combining?"

Then she stops herself.

"I mean, if it's not a trade secret, that is." And she clears her throat. "I honestly dunno how magic works either, really. No one seems to. It's got something to do with mana count, with is like - how inherently magical the world around you is, and that's something to do with essence, which is - not a soul, exact, its the latent magical energy that every living thing has because it's alive. And those two things work together somehow to make magic, or at least have for the last fifty years. But beyond that...." she shrugs. "Hey diddy ho diddy, no one knows. Just that it does, and how to use it."