Even though Elena was able to counter all the moves that the large man was making with her elevated power level, she was not really having an easy time. Fighting without her hands as a sword user was extremely troublesome and Elena was taking continuous damage. If this went on, Elena's HP would reach zero very soon.
As for her hands, they still needed some time to regenerate. But unfortunately, the large man was unwilling to give Elena that time. So Elena decided use another one of her trump cards. She had actually wanted to hide this card of hers as if this man could somehow leave this place alive then her secret would be out for the whole universe. But seeing that no other option was available to her, Elena decided to use that powerful trump card.
