Unlike the mirror image technique cast by Mages, the Sword Shadows created by the Qingyun Sword Art were capable of inflicting damage, although initially their power was only a tenth of the wielder's. However, as one's mastery of the Sword Art increased, the shadows would grow stronger, and he could summon more of them, overwhelming the enemy. Lancelot tried applying the key points from the cultivation technique, and to his surprise, managed to easily create a Sword Shadow.
Ordinary Cultivators generally fight bare-handed, manipulating Magical Treasures, talismans, or spiritual beasts as needed, but since Lancelot didn't have the means to do so, he was accustomed to using his Qingyun Sword Aura in conjunction with a weapon. Therefore, the Sword Shadow he created resembled a hazy Longsword.