Most materials for refining ordinary swords and sabers are not even considered by sword cultivators.
Even the Deep Sea Cold Iron that Gui Ruquan and others obtained was only barely acceptable as a material for Yuan Spirit Flying Swords, but for many high-level sword cultivators, it was still not esteemed enough.
However, suitable materials for sword cultivators to forge flying swords are extremely scarce, and a sword cultivator's entire ability rests upon a single flying sword.
Thus, there were quite a few sword cultivators who, seeing no hope of finding appropriate materials, had no choice but to use common materials to refine their Yuan Spirit Flying Swords. Naturally, they were extremely cautious in combat and dared not use this flying sword lightly.