Fastitocalon nodded. “Splendid. Now, instead of electromagnetic radiation, sub in something called mirabilic radiation, the quantum of which is not the photon but a thing called the esson. Damn, I did say I wouldn’t get into this, didn’t I? Sorry. Never mind essons for the moment. Mirabilic radiation is what ends up getting called magic. It works on a different plane of existence than physics does, but it behaves very similarly to EM radiation.”
“Nope, you’ve lost me,” Greta said. “Go back to ‘different plane of existence.’“
“—I need a piece of paper and a pen.” Fastitocalon reached over for the notepad she’d used to write down their shopping list. Greta had successfully managed to ignore the fact that it had very small clip-art bats printed along the margins, but Fass raised an eyebrow.
“Bat Conservation International is a very worthy organization,” said Ruthven, and cleared his throat. “Go on. You were saying?”
“I’ve no doubt. —All right, young Helsing, think of reality as being made up of a series of layers stacked one on top of another.” He sketched out something that looked a bit like a slice of layer cake. “This is the prime material plane, written out as =1. The particles that make up matter—protons, neutrons, and electrons—exist on this plane. We have a great many equations explaining how they behave, some of which I recall trying to teach you. The next plane up, =1+1, is where you start to find the essons, and I’m afraid I’m going to have to talk about particles for this to make any sense.”
*coos and rolls around in this* Everything, Everything, Just all of the everything I love it.