Val understands very little of math. Her homeworld had very little science, so they had no need for the higher forms of math. Sure she can do all of the basics, but a great deal on Earth had confused her. Percentages, even, had taken her forever to learn. There was no way she'd ever understand what Lucifer was doing.
Magic on the other hand, was....more simple. Once you knew a spell you knew it. That's all there was to it. Spells could be disrupted or broken, but it was more straight forward. Crafting a new spell, that was hard as is changing a spell you knew. Val could do that with time.
And that was what she dreamed about.
She was home, in the palace, working in the spelltower. There were many workrooms for the mages, depending on what element they needed. High in the sky where the wide cased windows caught the breezes was best when working with air. On the table were books, so many open books. She was working on an unfamiliar spell, one she'd never learned before. She needed azurite and eagle feathers....crushed beetle carapace and thyme ground into a fine dust. The stone, the powder together in a shallow bowl. Water from a high mountain poured over and the stone melted, the mixture swirling into a glowing blue ink.
She dipped the quill of the eagle feather into the ink and it sucked it right up, tinging the feather end to end blue and every bit as luminescent. That was it, this was what she was trying for. She stepped back from the table and drew in the air. Where the sharp quill tip passed a thin blue line was left in the air. She drew upwards in an arc as tall as she was then down to the floor and over. Up again and there was a doorway there, glowing before her. She'd never managed this before, had never tried. Few were allowed to learn.
The doorway didn't swing open like she suspected so she reached out, prepared to push it open, but when her hand met with the invisible plane she was pulled through instead, plummeted through endless darkness until...
...In reality she woke as she tumbled off the edge of the bed and let out a short shriek of surprise just before she hit the floor. And then a more quiet 'oof'.