"With my Grade C aptitude, the Primeval Sea I can store in my aperture is at most forty-four percent. The speed at which Gu insects repel Primeval Essence is much faster than the speed at which I recover it myself. If I want to refine Gu insects, I must borrow external force—meaning I have to consume Primeval Stones."
"The weaker a Gu insect's will, the smaller its resistance, and the easier it is for me to refine. However, every living creature possesses a will to survive. To refine the Moonlight Gu, I need at least five Primeval Stones, and at most eight." Relying on his rich cultivation experience, Fangyuan estimated the total amount of Primeval Stones he would consume.
"Now, to refine the Wine Worm, it will take at least eleven, and at most sixteen." Although the Wine Worm was a Rank One Gu insect just like the Moonlight Gu, it was undoubtedly much rarer, and the difficulty of refining it was correspondingly greater.
Chapter 17