Magi Babble/Quotes

Long Version: The missing term is called the Sharma transduction tensor, also known as the thaumic flow transduction potential: the amount of nearby matter and energy which is enchanted and/or arranged in a mystically significant way. Flowing electrical lines will contribute to this factor. So will static or charmed magic rings, static or charmed staffs, electromagnetic waves, large electrically neutral masses and, in the smallest quantities, all other mass-energy in the universe out to an infinite range, give or take the inverse square law.
Short Version: A Wizard Did It.