He did make mistakes, but she ignored them as none of the mistakes she'd made so far allowed for a killing blow. Irine kept applying pressure with her Sword Arua that filled the sky and flowed like water in her hands. Xasha's Sword Aura was a copy of the one he saw Qingo use a few years back.
So far, he only knew how to coat his blade in sword aura and release a crescent blade aura to attack from a distance. Despite this, he combined it with the Sword Art he learned from Jackle, and the ones he learned in Sutherland. His sword skills were practiced and mastered for over two decades. The Aura coat was all he needed to match Irine.
Xasha marveled at the Aura Arts Irine displayed. He realized he had barely scratched the surface of this discipline. This did not discourage him. Instead, he was extremely excited. He could just picture himself raiding the Kou Collective's vault for Aura Arts after the war.