Pitter patter…
Big, heavy raindrops fell to the earth, battering the roof of the verdant bamboo house, making brittle sounds.
The surface of the pond in front of the building was full of ripples as the rain fell, the fish in the water swimming lively around, the aquatic plants swaying about at the bottom of the pond. The sky was overcast; a thick rain curtain obscured the field of vision as far as the eye could see.
In the somewhat dim room the window was open, and Liu Yin quietly watched the heavy rainfall.
"Liu Yin, close the window and start refining Gu." She closed the door and window and sat cross-legged on her bed. She closed her eyes slowly and after breathing a few times, she calmed her state of mind.
In the next moment the vision of his primeval aperture appeared in her mind. The aperture may be positioned inside her body but it was mysteriously unusual, limitlessly big and yet infinitely small. The outer layer of the aperture was a layer of light. The white light gave a thin impression, but it still supported the aperture well.
In the aperture was a sea of primeval essence. The seawater was a green copper color, the surface of the sea clear and calm as a mirror. The water level was about half the height of the aperture. The entire volume of the sea occupied 100% of the aperture.
This was the green copper primeval sea of a Rank one Gu Master, and every drop of seawater was primeval essence. It was Liu Yin's life elementary force and the condensation of her essence, vitality and soul.
Every drop of primeval essence was precious, because it was the root of a Gu Master, and was the source of power. Gu Masters need to rely on primeval essence to refine and use Gu.
Liu Yang sat next to his sister and started to instruct her. This was the first time Liu Yin had used the primeval sea to refine Gu.
Previously, she was using primeval essence Gu to do so, so it was very easy, because primeval essence Gu could eat primeval stones and produce primeval essence very quickly.
Liu Yin already had vitality Gu now which was primeval essence Gu, but refining it was easy because it contained her brother's will.What she is now refining is Qi-blade Gu.
As she retreated her mind from the primeval sea, Liu Yin opened her eyes retrieved the Qi-blade Gu.
With a simple thought, the primeval sea in her aperture tumbled and a jet of primeval essence broke from the sea surface and transferred out of the body, finally rushing into the Qi-blade Gu. The Qi-blade Gu suddenly radiated fiercely in red light, slightly trembling in Liu Yin's palm, resisting the influx of primeval essence.
Gu are the essence of heaven and earth, carrying the secrets of the world, the bearers of the law of nature. They are living creatures that live freely under the sky, each born with a will of its own. Right now with Liu Yin trying to refine it, it would mean wiping out its will. Feeling the danger looming, the Qi-blade Gu naturally resisted.
The process of refining is a very difficult one.
Ten minutes later, Liu Yin's primeval sea had used away 10% of primeval essence. Yet on the red crystalline Qi-blade Gu's surface, the points of green copper essence on the Qi-blade Gu only expanded a tiny little area towards the center.
The resistance of the Qi-blade Gu was immensely strong. Fortunately, Liu Yang had anticipated this in advance and had given instructions to his sister, so Liu Yin was not surprised by what had happened. She persisted and poured in more essence into the Qi-blade Gu.
After another One hundred and forty minutes, the primeval sea in Liu Yin's body was only left with 15%. The green copper essence on the Qi-blade Gu had expanded about halfway, the surface of the Qi-blade Gu was covered by about 5/12. That is, Liu Yin refined 40% of the Gu worm. The rest of the Qi-blade Gu's surface was still the original color of light red.
"Refining a Gu is so hard," Liu Yin sighed as she looked at it. She broke the influx of primeval essence, stopping the refining process.
the Qi-blade Gu was still emitting its faint red halo. Even though Liu Yin had stopped refining, the Qi-blade Gu did not stop resisting; it was still driving out Liu Yin's green coppery primeval essence.
Liu Yin could clearly feel that the primeval essence that she poured into the Qi-blade Gu was being pushed out, bit by bit by the Qi-blade Gu out of its body.
Based on this speed of reduction, in about thirty hours later the Qi-blade Gu would be able to completely expel all of Liu Yin's primeval essence. At that time when she needed to refine this Gu it would make no difference from starting over again.
"Why do you look so dissatisfied? What you've done is really amazing." Liu Yang raised one eyebrow as he looked at his complaining sister.
"It is tiring for me to sit for two and a half hours without doing anything other than refining a Gu worm." This was Liu Yin's first time to try refining a Gu worm for such a long time. When she was using primeval essence Gu, it was much easier and faster.
"You have to get used to this, in the future you will have to cultivate for continuous days without interruption. " Liu Yang advised his sister and then began explaining about refining Gu worms.
"Every time when refining Gu, it is just like a fight between two armies, a battle of positional warfare, or war of attrition. Even though You refined 5/12 of the Gu, You wasted three quarters of your primeval essence. When refining Gu, a Gu Master has to replenish his primeval sea while continuously engaging the refinement process, consolidating his victory. The refinement of a Gu is a test of one's skill in shifting his primeval essence and the patience of an enduring battle."
When she heard her brother, Liu Yin took out a piece of primeval stone from her moneybag.
A Gu Master had two ways to replenish the consumed primeval essence. The first way was to absorb the natural essence directly from a primeval stone.
The primeval stone is a treasure from nature itself. As condensed natural primeval essence
The second way was natural recovery. After a period of time the primeval sea would naturally replenish the primeval essence. In the case of a C grade talent, it would take about one hour to replenish 4% of primeval essence. and in the case of the A grade talent, it would take about one hour to replenish 8% of primeval essence.
In the case of Liu Yang who had a grade A talent with a volume of 98% primeval sea, he could replenish 10% of primeval essence every hour.
However In the case of Liu Yin who had a Extreme Physique with a volume of 100% primeval sea, she could replenish 30% of primeval essence every hour. The speed of the replenish of the Primordial Sea of Liu Yin is three times faster than Liu Yang's.
Thus from here one can see the significance of the grade of one's cultivation talent. The higher the talent, the more primeval essence the aperture can hold, and the faster the natural recovery of the primeval essence will be.
"You don't need to consume a primeval stone, wait for the natural recovery of the primeval essence." When he saw that his sister was taking a primeval stone from her moneybag, he forbade her from using it.
"The primeval Sea would be replenished back to its original volume of 100% in less than three hours, So you don't need to use a primeval stone." in the same time frame the Qi-blade Gu could only expel away 1.5% of primeval essence. Liu Yin did not require the external help of a primeval stone. She could go on refining with a few rests in the process and successfully refine the Qi-blade Gu in a few hours.