This was also a crystal, but it had turned a pale gold color, and its interior was no longer visible.
The white light still didn't stop, continuing to extend downwards, and soon reached the fourth pattern.
Another pattern appeared, which depicted a pure golden crystal. Its surface had countless fine pores, through which one could vaguely see fine, hair-thin streams of golden energy shooting out.
Just looking at the pattern felt like a stinging sensation.
At this point, the white light finally slowly dissipated, no longer extending downwards.
Ning Fa was already somewhat dumbfounded.
His gaze darted back and forth between these four patterns, and he was particularly unable to hide his shock as he looked at the bottom two.
"Gold Thread Stone, Yaojin Stone, Geng Metal, Gold Source Crystal Core..."
Ning Fa murmured excitedly.
The Yaojin Stone aside, while rare, was only a third-tier material.
But the Geng Metal was a renowned treasure of sharp metal, even among fourth-tier spiritual items, it was considered top-tier.
The Gold Source Crystal Core, however, was not as famous as Geng Metal.
This wasn't because it was inferior to Geng Metal, but because it was a genuine fifth-tier spiritual item, and thus not widely circulated in the cultivation world.
Even for Nascent Soul Cultivators, obtaining such a top-tier spiritual material was merely a wish.
Now, the Source-Crossing Heavenly Book displaying the patterns of these four crystals made its intention all too clear.
That is, one could use this second-tier Gold Thread Stone to trace back to the other three crystals.
The reason for this was obviously that these four crystals shared the same origin, and the initial source was likely this Gold Source Crystal Core.
At this moment, a profound piece of information entered Ning Fa's sea of consciousness, confirming his guess.
"Tracing back to Yaojin Stone requires 100 second-tier source points, tracing back to Geng Metal requires 60 third-tier source points, and tracing back to Gold Source Crystal Core requires 2 fourth-tier source points."
Although Ning Fa had anticipated that tracing back the Gold Source Crystal Core would require fourth-tier source points, the surprisingly high cost of two points made the corner of his mouth twitch slightly.
After all, tracing back the Sword Soul Pearl to the Sword Soul Pearl previously had only required one fourth-tier source point.
However, Ning Fa quickly realized that this didn't mean the value of the Gold Source Crystal Core was higher than that of the Sword Soul Pearl.
Firstly, the Source-Crossing Heavenly Book had its own standards for the number of source points required to trace back various spiritual items, which did not equate to the conventional value system of the cultivation world.
Ning Fa had known this for a long time.
For example, tracing back top-tier cultivation techniques like the Ancient Source Thunder Scripture or the Moon God Art required very few source points in Ning Fa's opinion.
Yet, tracing back other items that Ning Fa considered not very valuable required a high number of source points.
Secondly, this was also because the starting point of this Gold Thread Stone was too low, only a mere second-tier.
The cost of tracing it back directly to the fifth-tier Gold Source Crystal Core would naturally be high.
Ning Fa believed that if it were Geng Metal tracing back to the Gold Source Crystal Core, it wouldn't require so many fourth-tier source points.
At this moment, Ning Fa was already incredibly excited.
Not because the Gold Thread Stone could potentially trace back to the incredibly precious fifth-tier spiritual material, the Gold Source Crystal Core.
But because the Source-Crossing Heavenly Book now possessed the ability to trace back pure spiritual ores.
Previously, the Heavenly Book's tracing back had significant limitations.
One of the important rules was that it could only trace back formed items, such as pills, talismans, cultivation techniques, magic tools, and treasures.
But it could not trace back the most basic materials, like these spiritual ores.
Now, however, the Heavenly Book could achieve this, tracing low-tier spiritual ores all the way up to higher-tier spiritual materials.
This was of great significance to Ning Fa.
After all, at his current cultivation level, ordinary spiritual items could no longer satisfy him, not even common fourth-tier spiritual items.
But top-tier spiritual items were inherently rare, especially spiritual ores, as every bit mined was gone forever.
For a long time, fourth-tier and above spiritual ores had become extremely scarce.
However, with the further recovery of the Source-Crossing Heavenly Book, this problem could be solved.
As long as he could find a low-tier spiritual stone of the same origin as the spiritual ore he needed, he could trace it back directly.
High-tier spirit stones were hard to find, but low-tier spiritual ores were much easier to find.
Moreover, Ning Fa now knew a stable source of high-tier source points, as there were quite a few Sea Race and Demon Race members in this world.
This meant that as long as he had enough source points, he could obtain some of the top-tier spiritual materials he needed.
Just thinking about it made Ning Fa incredibly excited.
This was because one of the important ways to improve his Divine Thunder of the Five Elements was to find some high-tier Five Elements spiritual items to absorb, most of which were spiritual ores.
Furthermore, he still lacked some key spiritual materials to craft the complete Divine Firmament Thunder Armor Set.
Under normal circumstances, even if he could find them all, it would definitely consume a huge amount of time and effort.
But now, by finding some low-tier spirit stones of the same origin, he had a chance to obtain them directly.
This made Ning Fa incredibly excited.
At this moment, Ning Fa gazed at the scroll, his eyes gleaming.
He suddenly thought, if he first traced the Gold Thread Stone back to Geng Metal, and then used that Geng Metal to attempt tracing back to the Gold Source Crystal Core, would he be able to consume fewer Tier Four Source Points?
With this thought, Ning Fa immediately put his plan into action.
As his mind moved, the pattern representing Geng Metal on the surface of the Heavenly Book lit up with a white glow. Simultaneously, the Gold Thread Stone in Ning Fa's hand was also enveloped by the white light.
After a few breaths, the white glow dissipated.
In Ning Fa's hand, there was now a walnut-sized stone, emitting an extremely sharp aura. It was, in fact, a piece of Geng Metal.
Ning Fa suppressed his excitement and once again communicated with the Heavenly Book mentally. However, to his astonishment, the surface of the Heavenly Book remained completely still, showing no reaction at all.
Ning Fa's excitement faltered, and he frowned slightly.
After a moment's thought, he clapped his hands in front of him.
Instantly, a larger, pale golden stone appeared amidst a burst of light. It was also a piece of Geng Metal.
Ning Fa couldn't recall which Nascent Soul Cultivator he had obtained it from. Due to its scarcity, it wasn't enough for him to reforge the Heaven-Shattering Sword, so he had kept it aside.
As Ning Fa communicated with the Heavenly Book again, this time it finally responded.
On its third inscribed line, white light flickered, and the pattern of this Geng Metal appeared.
It then extended downwards, and in another pattern, the appearance of the Gold Source Crystal Core slowly emerged.
At the same time, a piece of information entered Ning Fa's sea of consciousness.
"Tracing back to Gold Source Crystal Core requires one Tier Four Source Point."
Ning Fa was stunned for a moment, then a wry smile touched his lips.
His attempt to find a shortcut had failed. It seemed that spirit ores that had already been traced back using the Heavenly Book could not be used for tracing again.
This was a great pity for Ning Fa.
However, he was still unwilling to give up. He rummaged through his Storage Ring and took out another glistening blue stone with layers of ripples on its surface.
This was also a Tier Two spirit ore of the water attribute, a Blue Pattern Stone.
The surface of the Heavenly Book once again flashed with white light, and on the second and third inscribed lines, patterns appeared, both resembling somewhat similar blue crystals.
Condensing Wave Stone and Ebb Tide Stone.
These were a Tier Three and Tier Four spirit ore respectively, but no Tier Five spirit stone appeared. Clearly, the origin of the Blue Pattern Stone was the Ebb Tide Stone.
Ning Fa then unhesitatingly used some Tier Two Source Points to trace back the Condensing Wave Stone. However, as expected, this Condensing Wave Stone could not be traced back again.
Ning Fa, still unwilling, took out several other types of ores to test, but the results were all the same.
Ning Fa finally gave up. Although he felt some regret, it was not a major issue. He just needed to find higher-tier spirit stones from the same origin in the future.
However, how to identify lower-tier spirit materials that shared the same origin as the top-tier spirit materials he needed was still a problem.
But it wasn't a big deal; he could experiment slowly.
Next, Ning Fa's eyes gleamed. He couldn't help but wonder if other initial spiritual materials, besides spirit ores, could also be traced upwards like this? For example, spiritual grasses and spirit flowers.
With this thought, Ning Fa suddenly grabbed his right hand, and a pale red spirit flower with five petals appeared in his palm.
This was a Tier Two Upper Grade fire-attribute spirit flower, the Fire Cloud Flower, which could be used to refine some fire-attribute spirit pills.
Furthermore, the Fire Cloud Flower in Ning Fa's hand was already eight hundred years old, making it quite valuable.
But to Ning Fa's expectant gaze, the Source-Crossing Heavenly Book showed no change at all.
Ning Fa sensed something was wrong and immediately clapped his right hand repeatedly. Instantly, dozens of spiritual grasses and spirit flowers, emitting various colored glows, appeared before him, ranging from Tier Two to Tier Four.
However, without exception, the Source-Crossing Heavenly Book showed no reaction whatsoever.
Seeing this, Ning Fa could only give up, realizing that the Source-Crossing Heavenly Book was unable to trace spiritual grasses. This made him feel a bit regretful.
He wondered if the Source-Crossing Heavenly Book simply lacked this ability, or if its current recovery was only for tracing spirit ores.
Or perhaps, if the Heavenly Book absorbed something similar to that white fragment again in the future, it might regain this ability.
In Ning Fa's opinion, the latter was more likely.
Ning Fa couldn't help but think of that white fragment, but it was a pity he didn't know its origin.
Judging by the demeanor of the Tianli people before, they seemed to intend to integrate that white fragment into the Nine Divisions World-Suppressing Pagoda.
And the fact that the white fragment could cause such a significant change in the Source-Crossing Heavenly Book was enough to show its extraordinary nature.
If the Tianli people really managed to refine it into the Nine Divisions World-Suppressing Pagoda, it would be an absolute disaster for Cangyuan.
Next, Ning Fa took out the many spirit ores he possessed and tested them one by one. As a result, more than half of the spirit ores could be traced.
This naturally overjoyed Ning Fa.
What surprised Ning Fa even more was that the Heavenly Book could now even trace spirit stones.
Tracing a Mid-grade spirit stone to a High-grade spirit stone required sixty Tier Three Source Points, and tracing it to an Excellent-grade spirit stone required two Tier Four Source Points, just like the Gold Thread Stone.
This made Ning Fa unable to help but laugh heartily.
There was no doubt that after this change, the Source-Crossing Heavenly Book would provide him with far greater assistance than before, especially at a time when he urgently needed to increase his strength.
Thinking of this, Ning Fa couldn't help but think of Huangfu Hong, Shen Xinlan, Pei Nanshu, and others who had harbored ill intentions towards him. A cold glint flashed in his eyes.
He flipped his right hand and took out a special silver paper, which was none other than the Silver Que Heavenly Book that recorded the Five Qi Returning Origin Sword Canon.
A strange expression appeared on Ning Fa's face.
"Now that I have enough Innate Five Elements Qi, three months should be enough for me to successfully cultivate the Five Elements Calamity Heaven Sword Array, shouldn't it?..."