Several days later, at night.
Swish swish swish…
Waves surged in the aperture and thousands of white silver snowflakes swirled up.
Under Fang Yuan's will, the peak stage rank three primeval essence rushed at the aperture walls.
Like the prancing of ten thousand beasts or the movement of the galaxy, the seventy six percent primeval sea swept through everything with a force majestic and boundless, far above lower grade aptitudes.
Primeval essence continuously cleansed the aperture walls.
The cleansing slowly and quietly caused a hidden change in Fang Yuan's aperture walls.
When this change accumulates to a certain degree, it would cause a qualitative transformation and cause his cultivation to breakthrough rapidly to another realm.
This realm was rank four!
"Rank four, I am only a step away…" This sensation was becoming more and more intense in Fang Yuan's heart.
Snow silver primeval essence violently attacked the borders of rank four realm, consuming huge amounts of primeval essence. 76% primeval sea was of no help and the aperture walls were already cleansed to sparkling pure, but there was no change.
Although rank four was only a step away, this step was like a deep gully which was very difficult to cross.
No one knew how many Gu Masters were stumped at the border between rank three and rank four and how many grand ambitions were stifled.
But Fang Yuan didn't give up, he was already absorbing the primeval essence from primeval stones and he tried once again.
Two whole hours later,
Crack.
Following a soft sound, tiny cracks started to appear on the aperture walls.
Dazzling white light burst out of the cracks.
The cracks continued to enlarge and the crystal walls started to collapse like the collapse of an iceberg; pieces started falling towards the bottom of the primeval sea and turned into nothingness.
The crystal walls were no more to be seen, replaced by a layer of thin light membrane. However, this white light was even more dazzling and shone upon the whole aperture.
A drop of light gold primeval essence floated up from the bottom of the sea.
Yellow gold primeval essence!
Fang Yuan advanced into rank four realm!
"I have finally reached rank four! In just a year, I made such huge progress." Fang Yuan slowly opened his eyes; bright, sharp light flashed through them and drew a ray of lightning through the dark secret room.
He was pleased with this result.
To be able to advance to rank four using a short period one year, he had to give entire credit to Flower Wine Monk.
It was all thanks to that recording. Without it, he would never have advanced this quickly in this life.
Advancing to rank four meant stepping into a whole new world! In the mortal world, rank one and two were only low levels, rank three was middle level, while rank four and five were the high levels.
After reaching this stage, Fang Yuan could be said to have grown and exceeded most Gu Masters.
"Since rebirth, my cultivation has now reached rank four. Compared to my previous life, this speed is faster by countless times. By taking a step first and then moving step by step, I have accumulated my advantage continuously and reach today's accomplishment. All these were due to the help of my previous life's experience."
"However, although I have advanced to rank four, there is still something I need in this mountain…."
....
"It is time." Fang Yuan willed; the sea waves paused, and a portion of primeval essence surged up and poured towards the Yellow Golden Relic Gu.
The Yellow Golden Relic Gu immediately shook and flew up, giving off bursts of golden rays of light.
It was like the slowly rising sun, its rays of light shining upon the aperture wall.
The rays of light were as hot as fire and as dazzling as a sword.
For Fang Yuan to advance to rank four middle stage with normal methods, he could only use the method of grinding; using his light gold primeval essence to cleanse the light membrane aperture wall.
But now, Yellow Golden Relic Gu gave off majestic yellow light which replaced the light gold primeval essence and poured directly into the aperture wall, giving astonishing results.
Fang Yuan could see the whole light membrane thickening at an astonishing pace.
The light on the light membrane condensed into streams of light, gradually changing to a water membrane. The white shimmering rays flowed continuously; becoming clear one moment and bright in the next.
Right now, Fang Yuan had advanced to middle stage!
However, the Relic Gu was still bursting with golden rays of light.
The rays of light filled the whole aperture; it replaced the primeval essence and continuously injected its essence and foundation into Fang Yuan's aperture.
The water membrane accepted it all and the shimmering rays of light on it was like water as it flowed freely.
This continued on for about fifteen minutes.
Yellow Golden Relic Gu had thoroughly exhausted all its energy; its body turned transparent and disappeared in the golden light.
The penetrating golden rays of light also suddenly dissipated with its disappearance.
The aperture recovered its tranquility once again.
However the water membrane had become much thicker. Using the Yellow Golden Relic Gu had saved Fang Yuan from wasting a lot of time and effort.
A thread of bright gold primeval essence appeared in the primeval sea.
This was the rank four middle stage primeval essence. It was more condensed than the light gold initial stage primeval essence. It sank to the depths of the primeval sea and lingered around the White Jade Gu.
A Yellow Golden Relic Gu could directly strengthen the foundation of the aperture. To a Gu Master, this meant advancing by a small realm.
This type of Gu worm was naturally better if used early.
After reaching the middle stage, Fang Yuan took several primeval stones and started recovering his primeval essence. He stopped only after the 76% percent primeval sea in his aperture had completely filled with middle stage bright gold primeval essence.
Fang Yuan took out another two Yellow Golden Relic Gu and started cultivating.