The raw material of darksteel epee is actually Fuxing, which falls from the sky. A piece of darksteel is extracted from meteorites and then smelted to form darksteel epee. No matter in ancient times or now, the meteorite itself is very precious, so there is no doubt that the darksteel epee is a very precious sword, and those who can own it must be very powerful.
Yang Guo chose black iron epee because Yang Guo had many choices, because the sword buried alone was not only black iron sword, but also heavy, which might not be suitable for brokeback Yang. But in fact, Yang Guo's situation at that time can be said to have reached the bottom of his life. After Yang Guo's arm fracture, he basically became a cripple and needed to exercise his left hand again. If you use wood blade at this time, it won't actually play an exercise role.
Although it may be difficult for Yang who has just been injured to pick up this sword, if Yang uses this sword flexibly, his left hand strength can be well exercised. And in the process of fighting, even if Yang Guo has only one arm, he can rely on the weight of the black iron sword to increase his lethality.
And dugu's predecessors also rely on the dark iron sword to increase their strength between the ages of 40, and when his martial arts cultivation is already high, even with a wood blade, he can be world-beater. Therefore, it is the best choice for Yang Guo to exercise with black iron sword at this time.