She smiled to him watching him copy her jutsu entirely and could only give off a smirk towards him as she watched him avoid her attack. However as much as he could copy her move, it wasn't perfected and neither did he know all of it's use, only what he could copy. "Speed isn't everything...you may also want to defend yourself from time to time when speed fails." She saw him more than just enjoy himself in the battle but rather engorged himself into it. She continued to push the shield towards him to attack but at the same time knew she was running out of time.
She could only return his sentences to the chatter among the crowds yet not heard. "Thank you, it was completely crafted by myself, tested and used by myself, and just as you mentioned my knowledge of Uchiha...I will say it's not the easiest thing to control." She paused not giving off much intel however she knew if he was to try to replicate it, especially with the element he possessed, three possibilities existed. One was he ruined the Kanji and blew himself back because of it, the other was taking the time to write the letters, which was a moment of defenseless standing, no matter how fast he was one had to stay still to write the letters, and then lastly no hand sign jutsu whatsoever could be used with it in use.
If anything were to break concentration upon this and cause him to stop the process even when it's ready and working, he could have an extreme blowback. But more than that was the fact he was so fast, but the jutsu followed chakra and if that chakra isn't focused because of said speed, it would once again blow him back. This jutsu however versatile was also dangerous if done wrong, which is why she perfected it so well throughout her years as a genin.
She knew however if he did correctly use the attack, he'd win by a landslide due to her chakra reserves draining and dawning. This way she kept him busy and unconcentrated to really test and see how he'd react. It was one thing to perfect the jutsu alone and standing, but a brand new never known jutsu in the midst of battle with many drawbacks and more versatility than most jutsu made it damned hard to figure out in an instant, even for the more well known or even the higher ranked. Even her own sensei whom was an Uchiha as Lavii is couldn't completely perfect it, only use one as he saw before that Hitomi used. This didn't mean it would be the same for Lavii, but that it would be difficult to surpass that kind of power.
WC: 461
Total: 2288
CP 30-20=10 *20 is lasting jutsu cost*