Better not linger in her starting place too much longer. Yellow's faster than her and may have already come home to a wreck. Thorn might have a habit of checking up on the place, even, just in case. She's invisible, inaudible, unsmellable - that won't help if he sends someone thorough. Or comes in person.
She sets out.
She's been flying for about thirty minutes after her shopping trip when she falls through a tear and squeaks inaudibly and lands in the middle of -
"Depends on the end goal. Turn other fairies into animals, sometimes. Fire and lightning and ice. The opposite of healing is strictly speaking easier than healing, all else being equal. Occasionally rapid plant growth sees combat use."
After a few more iterations of seeing what changes the distribution of fairy lights, he feels like he has a decent grasp on what kinds of things affect harmonics. He moves on to testing the more promising ones for what kinds of changes they have.
She continues to map the square as they go, pausing once to get a new map of the unaltered region in case it has changed (it has).
Apparently unsatisfied with the pieces in his halberd, Armsmaster starts dismantling one of the less important observational equipment. He grabs a particular piece, reassembles the by now unrecognizable device, and tries it again.
"Truly flat harmonics would be amazing. If a potential liability once any other sorcerers noticed that was what was going on."
"Usually a fight between two sorcerers of similar skill is decided by who knows the territory better. A harmonics-flattener would destroy that advantage and replace it with an advantage from the person who knew the harmonics were flat, but only until that occurred to their opponent."
By now he has cannibalized part of his leg armor for a particular piece. Oh well, wasn't moving around much anyway.
"Or something similarly chaotic, yes. Then whoever has the machine would at least know which state the battlefield is in and when."
"Good sorcerers can adapt to conditions very rapidly, but yes, that might make a large difference."
After a particularly favorable result on the next test, Armsmaster asks "Can you try this one outside?"
It flickers and stabilizes, then winks out. "Two point seven seconds. Good, needs to be better."
"By a lot. Lights are the simplest thing. If it shredded a light that fast, invisibility or something like that wouldn't last long enough to be worth casting."
"Traditionally, the first test doesn't work at all. We can probably have one that lasts a useful time by... do fairies need to sleep?"
"That would be nice, especially if I'm going to be traveling back and forth and doing things here."
"The device won't last forever – maybe years, not centuries – but I can maintain it in exchange for sorcery training. Though I imagine the Protectorate would want me to keep it working anyway."
"I haven't fully decided how comfortable I am working with the Protectorate. It seems... well-intentioned, and I'm not sure how high a standard is realistic for human organizations, but..."