Copper, sulfur, water. Copper, sulfuric acid, water, in fact. Those are her reagents. Now, she shall make her product.
A simple heat engine, assembled by her hands and magic (- Sylvia conjures a single piston with a vent for heated air, before humming, reconsidering, creating a piston with no vents and asking Diana to Push for the ability to draw heat back out of things; Ophelia intends to synchronize the cycle to their breath -) powering the motion of a magnet through coiled copper wire to produce electricity, is the core of her process. The wire is in turn affixed to the flask within which her reaction will take place.
In one hand, the right hand, she holds the flame and engine close.
In the other hand, the left hand, held wide and askew, she holds the reagents. She holds them with magic, but they are still held, and stirred to even consistency.
All her attention, all of their attention, is on this process.
She closes her eyes for a second, and focuses.
Dream. Imagine. Resolve. Create.