It started because it was interfering with my offensive borderline. I kept wanting to blast, instead of cut--because that was one of the skills I was used to. Since then, I've been learning to sense it in others and refining those blasts.

[A pause, and a hint of grin.]

You'd theorized at one point I could somewhat use it to shield myself. And you were right, but I'm glad we didn't find out by testing around your windows. I found out on accident, and there would've been a lot of broken glass.