She first manifests this blade when she stabs Erat at his back before she is, in turn, killed by her brother.
She used this to try and drain all of Erat's powers but failed, only managing to retrieve a small fraction of her powers.
In the altered timeline, Kara is fully aware of her powers and is able to use it to the best of its ability, though it can be easily canceled out by other Chrono Gang members. This ability may or may not be inherited. After learning to accept herself for what she was, she is able to control her ability at will, having used it to save innocent civilians from being crushed by falling debris and allowing allies to move within the confines of her time freezing. Her ability is powerful enough to even freeze Erat himself, something that both Infinn and Dura cannot do as they have weaker versions given to them by the former.