Kei'taro could feel his sword jam into Pikatok, and slice clean towards her belly button, a blow fatal enough that he didn't need to press the advantage he had gained. He was faintly concerned that he didn't tap her spine, so strong the swing, but he remembered her skin was harder than a normal person's, and she had defensive abilities that directly affected the skin. 

Crafty.

He could feel her press against the shield in an attempt to dislodge herself from the blade that bit deep. The snake Kusanagi sneered within him, urging him to push forward and finish the match.

He didn't need to be told twice. 

Kei'taro didn't need to move from his spot, but instead of dropping the blade, he tensed his arm and activatec Thunderbird, by speaking the self same name. From his right shoulder, a bolt of electricity with some extra oomph rocketed from his right shoulder, and followed the path downward with startling speed. The distance between them wasn't as great, between the starting distance, his reach, and that of a sword.

It's target was center mass, where the heart and lungs were commonly situated. 

His breath was reaching the stage of minor strain, he hadn't needed much exertion yet, whereas Pikatok had to be feeling the effects of a deep cut such as the one he had delivered. Now, however, they would both be aback at square one - magicless. He hoped this attack would end it, a physical fight with Pikatok, even with her weakened, was not a fight Kei'taro wanted. He was faster, she was stronger.