The Ghost World Treasure Compendium he had bought at the Ghost Market had mentioned this Yellow Springs Crystal. This item was harvested from the Nether River and had many uses; it could concoct elixirs, assist in cultivating illusory powers, and refine dazzling magical instruments. Although it was not as rare as Netherworld Bamboo, it was still extremely precious.
As he toyed with the Yellow Springs Crystal in his hands, he was reluctant to part with it.
However, in the next moment, he cut off his reluctance.
After all, no matter how precious this item was, it could not compare to his life-extending elixir.
Shen Luo put down the Yellow Springs Crystal and turned his gaze toward the three luminous white skeletons.
Strong waves of Yin Qi emanated from the skeletons, far surpassing the material for his previous Ghost Wailing Ring.
