The wind itself was the blade, and Tang Shaoyang was under constant assault by the wind blade. They came from all directions while Malrus hid from him. The flow of mana was more chaotic, and it was much harder for Tang Shaoyang to find Malrus in this situation. Battle Sense did not help at all because it kept warning him of the incoming danger from the wind blade which was all the time. As long as the wind storm was raging, Battle Sense was useless.
Tang Shaoyang constantly moved in the middle of the storm, constantly blocking all the incoming wind blades. He smashed the wind blade easily. His movement was smooth, and he read all the incoming wind blades. Even the one that came for his blind spot. Even though it was his first time swinging the bladed shield. But it looked like someone who had been practicing with it for years.