His assault had landed, without a doubt, he'd felt it. It may not have done one hundred percent of the overall damage he had expected it to do, but it was still sufficient enough for now. The issue at the moment wasn't the attack's fruition so much as the resounding counter which Chidori presented Kazuma with. He had expected such a response to begin with, but theory and practice are vastly differing concepts; experiencing it was in a world all on its own. With out any regard for his potential and feeble ideals of him happily keeping his feet flat on the ground, he was flung backwards relentlessly. It was very reminiscent of one of those tasteless human films to which they defy all sense of physics and make a last ditch effort to jump out of the way to absolve themselves of the concussive force of some warehouse exploding. Except, as it were, Kazuma must have missed the memo saying to jump away from the blast; seeing as how he was riding the wind backwards.
This wouldn't be so bad, if it were any other situation in which he wasn't facing a trained killer in a duel when both fighters have a bit of an ego when it comes on their combative abilities. It was in the seconds following his traversing across the air that he felt a chill rocket up and down his spine seething its way into his very core. It felt to him as if Chidori had some how teleported directly behind him and slammed her hand into the flesh surrounding his spinal cord and maliciously tugged against it in attempt to rip it out. (OOC; FATALITY!~) This feeling was so real, as was the innate fear of this that it cause him to physically turn around mid-air in a cold sweet. But then, it happened; he regained composure. This killing intent had simply taken him by surprise, but the feeling itself, the feeling of his life being threatened; was not something that was stranger to him.
Having willed himself back, he had no time to dawdle over something so trivial. "Hadō, number one. Sho." he mumbled, having stolen this idea from Chidori during the few seconds he has been in flight, the killing intent he felt was awful but not enough to dull his sense of hearing how she responded to their encounter. He was now sprung upwards, still airborne; but not quick enough. It was enough to avoid the tendrils of energy gunning for him, but not the mass of crimson energy. Hit the very tip of his foot. Damn, he almost had it. However, to counter this particular Kido was easy enough and it hadn't halted his plans to avoid her onslaught and counter. In order to counter this Kido, one simply had to overwhelm it's Reitsu output with their own. Charge up, as it were. And the quickest way to do that was....
"Corrupt, Bokoseido." he spoke these words almost tenderly as his Reitsu fluxed well more than enough to break the Kido and just in time for the gas to make its way through the air that Chidori just bolted through. His Zanpakutō was poison themed, once more one of its best attributes was that it altered shape to best suit the most efficient way to administer this poison in combat; which most often stayed as some manner of pole-arm like weapon. This time it was a large spear with the end opposite to the normal edge having the shape of a combat scythe, the two opposite ends met in the center by a black ring which allowed it to separate and the entire form of it was covered in holes; even the blades had holes in them which was obviously placed tactfully so that it wouldn't cause the blade to be brittle. With holes in the whole weapon, the sheer volume of gas being billowed out was staggering. More than enough to completely fill Chidori's lungs as she passed through the cloud that led up to his form which was practically floating over her head.
Shunko was many things, it had many things, but the ability to turn at the very second of a drop of a hate was something it didn't have. Which is why she was caught off-guard by this stage of his plan. Shunko could dilute damage from physical attacks among other things, but it didn't mean that the user didn't have to breath and use their respiratory system. Having dashed directly to where Kazua would've landed, Chidori had sealed her fate. This wasn't just any gas, it was a type of nerve gas. Which consisted of compounds similar to the human components that comprised Hydrogen Cyanide and Arsenic poisoning. This compound was odorless, colorless, etc. The only evidence of its existence was the gas's physical presence which seemed to be remarkably like heat waves coming off of a surface. The immediate reaction to such a strong dose would be her respiratory system going into shock, followed by pulmonary edema. Given that she still had the somewhat potent anticoagulant in her system this combo would be, without a doubt, lethal in minutes if left untreated. A fine example would be that she would first start by bleeding into her lungs, even faster than usual due to the anticoagulant and made worse that now her own body was working against itself.
Even now, he wasn't willing to risk it. She had minutes to live unless treated, but he knew her well enough to know she would keep fighting. Which is what he was afraid of. He hoped that one of the many side effects, unconsciousness, would take effect as quickly as possible. She was too goal oriented to give up. Which would kill her. Especially if she made a last ditch effort, since that would agitate her already sketchy state of being. But to be sure, he flashed stepped away from her, on the opposing side to her position. Near where she was previously, actually. Now, at this point, he was watching how his plan turned out. At this point, it was more about keeping her alive than winning. In terms of the actual fight he had already made check mate. But just in case, he got into a posture which meant his guard was up.