In truth, among cultivators of the same rank, Lin Xuan already possessed so many treasures that it would leave people dumbstruck. For other Foundation Establishment Middle Stage cultivators, having a single high-grade spiritual tool was already quite impressive, yet Lin Xuan had several supreme-grade spiritual tools.
But he also often ran into opponents whose realms were higher than his own, and compared with them, Lin Xuan seemed rather overshadowed.
The Jade Snow Ring had already been given to Yue'er, while the Hook Sword had come from the Fire Spirit Sect Leader and was already a supreme-grade spiritual tool. If he wanted to strengthen its power, mixing the Mother of Profound Iron into it was one effective method.
But the Mother of Profound Iron was a material for refining magic treasures. Even Core Condensation cultivators regarded it as a precious treasure, and ordinary Foundation Establishment Realm cultivators had never even seen it before.
However, the pages of the Heavenly Thunder Art book before him just happened to contain some.
Lin Xuan pondered for a moment, then took it in hand and came to the Alchemy Chamber. He cast out a spell seal, and from the beast heads on the floor, the blazing Earth Vein Fire surged forth.
Spirit Herb Mountain was famed throughout the world for alchemy, but in truth, it had dabbled in many miscellaneous arts, and had some involvement in tool refinement as well. There was no need to be surprised; this art had quite a few points in common with alchemy to begin with.
Lin Xuan had also read books on this subject. Of course, with his current level, wanting to refine a spiritual tool was absolutely impossible, but separating and tempering materials a little should not be much of a problem.
Lin Xuan formed a sword incantation