Compared to the Cold Marrow Jade Cave at the beginning, it was undoubtedly far more frigid now.
Even merely approaching it, Ye Jingcheng felt a wave of icy chill rushing toward him. An ordinary Nascent Soul Cultivator might not even have been able to endure it.
This left Ye Jingcheng somewhat astonished, but considering that Jade Spirit had advanced twice and frequently absorbed the Jade Qilin Dragon's cold energy, it became understandable.
At the very depths, chunks of cold jade had been piled together to form an enormous jade trough. Within the trough lay a small pool of cold marrow.
Ye Jingcheng lifted a drop with his spiritual power and immediately felt even his spiritual power beginning to freeze. A bone-piercing chill entered his body.
"This could probably be used even to break through to Void Refinement!" Ye Jingcheng truly had not expected this.
The Ten-Thousand-Year Cold Marrow obtained in the mortal world could assist in breaking through to Spirit Transformation.
But from the looks of it now, the cold marrow before him was absolutely not something Nascent Soul Cultivators could consume and refine.
"How many years does it take you to produce a drop?" Ye Jingcheng looked toward Jade Spirit.
"Master, under normal circumstances, it takes one hundred years to produce a drop. But if I catalyze it with all my strength, I can produce one drop in thirty years!" Jade Spirit answered respectfully.
Although its master had come to see it when it broke through to the Sixth Stage, it had only been at the early Sixth Stage then and had only just begun producing cold marrow. So many years had passed since then, and with cultivation techniques and spirit pills assisting it, it was naturally no longer what it had once been.
Although this cold marrow was