Song Jian plummeted from the sky and, in the process of falling, wielded the Sky-breaking Sword to execute the Thousand Swords Art and then immediately used the Sword Control Skill to resume Sword Flight Art. This maneuver was incredibly risky, considering that during free fall, one cannot control their body at all; it's essentially like being a moving target.
Fortunately, the Sword Flight Art was so rapid that it could easily evade the poison spitballs from the Double-headed Poisonous Jiao. However, the Sword Qi consumption was massive. Every second of Sword Flight Art drained Sword Qi Value, and because the Sky-breaking Sword was not a flying sword, it consumed double the Sword Qi Value of a regular flying sword.
Thankfully, after learning the Sword Control Skill, Song Jian's Sword Qi Value had increased by five hundred points. Otherwise, he really would have been at his wits' end.