As the battle reached a new peak, Xuan Hao found it increasingly difficult to keep up with his opponent without having to rely on the Drifting Cloud Steps, as even though his own comprehension of the Dao of the Sword far surpassed that of his opponent, he couldn't entirely keep up with the greatsword due to his limited cultivation.
Something that only became more difficult as his opponent's comprehension of the Dao of the Sword neared the Perfection Realm. Making it obvious that continuing the current pace of the battle would end up with him losing the second, his opponent broke through to the Perfection Realm in the Dao of the Sword.