Oh no, I only call it that because the witches said, from the other universe--I think you call it dark matter, or dark energy, it's the same really, 'cos of relativity. It's what keeps everything together and lets you do magic--it's just the part of the universe that talks to you, when you ask. They say it looks like glitter dust when you can observe it, like quarks.

[she pauses.]

I bet it's the same as the stuff you look at. Like, it makes it up. Like waves or atoms, but for magic stuff.