The knife flies past Hisame's head, tasting only empty air where it had sought soft flesh and sails onward, slamming into the thick bark of a tree a few meters away.  There it sticks, vibrating gently.

Procella, meanwhile, is still circling, and it is clear from her expression that she is enjoying this immensely.  "Good, good, you dance well."  She whispers the words, speaking more to herself than to her opponent.  For a few moments, she moves slowly, with tension, as if seeking out a perfect spot from which to strike.  But suddenly, mid-step, she abandons this plan, and throws out her left hand towards Hisame.  Her knife remains clutched in her right, and she is nowhere near enough to strike- she simply points her palm at her opponent, fingers splayed.

For an instant, this seems to be just another strange gesture, an unexplained symptom of the spirit's insanity.  But in fact, she is moving with deadly purpose.  As her arm is thrust, Procella pulls negative charges from the air around it, focusing them into her hand, building them up to an unnatural density, until there are simply too many to reasonably exist in the same space together.

And then, less than a second after she had made her movement, a cracking blue bolt of electricity erupts from her hand, blindingly bright and furiously hot, ionizing the air as it streaks towards Hisame with incredible speed.  Opposite charges attract- and now the negative charges gathered by Procella are traversing the air with terrible energy, seeking out the positive charge that had been built up in Hisame's left arm.