[Oh, yes, she has to tease and withhold it. It wouldn't be fun if she didn't after all and Primo does look more pleased than if she had praised the cicadas immediately. He also clearly enjoys the dance, she's probably, with difference, the most graceful dancer in the party.]

I think energy would be the simplest solution. They serve as a kind of optical representation of my magic, which is nothing but energy shaped in ways normal humans are incapable of. They tend to appear whenever I use my magic, or in this place, my home, as it was built with my magic as well.