## Chapter 2708: Two Levels of Array Integration into Runes
As the six individuals built the city, their state of mind began to stabilize, and their control over their power became more refined. Their aptitude was originally excellent, which allowed them to cross over and become saints in that era. Now, with the opportunity given by Lin Moyu and the help of the world tree juice, their innate aptitude had been significantly enhanced. Additionally, with a seventh-level origin spirit vein providing origin power, their cultivation was twice as effective with half the effort.
They were now enjoying the process of building the city, finding it to be a form of tempering. The thunder finally stopped after a full hour, and the formation group disappeared into the void. However, it remained clearly visible to Lin Moyu's eyes.
Lin Moyu remained motionless in the air, his mind constantly analyzing various details of the Wrathful Thunder Formation. In his soul world, the formation was repeatedly outlined, enlarged, and split into countless fragments as he considered where and how to improve it.
In fact, he had completely mastered the fifth-level formation, the Wrathful Thunder Formation, and his understanding even surpassed that of the Heavenly Thunder Taoist. If he were to take a formation master level test now, he would undoubtedly qualify as a fifth-level formation master. He was even qualified to learn sixth-level formations.
However, Lin Moyu did not move on. He continued to study and analyze the Wrathful Thunder Formation, aiming to merge runes with it and create a formation that was uniquely his own.
The Heavenly Thunder Taoist specialized in weapon formations, while some formation masters focused on rune formations. However, the truly powerful formation masters could merge weapon formations with rune formations to create even more potent arrays.
Lu Fengqing was such a formation master, capable of merging rune formations with weapon formations. Although it was a sixth-level formation, it could exert power close to the seventh level. Lu Fengqing had once wanted to take Lin Moyu as his apprentice, but unfortunate events had prevented this from happening.
At that time, Lu Fengqing lamented the lost opportunity, believing Lin Moyu's talent for arrays had been wasted. But was it truly wasted? Lin Moyu had never intended to become Lu Fengqing's disciple. If he wanted to learn array knowledge, he would do so in his own way, just as he was doing now.
He used that knowledge as a foundation, deducing from it, adding his own understanding of arrays and runes, and creating a methodology that was uniquely his. Lin Moyu dissected the Thunder Array, examining its various details, and then integrated runes into it one by one.
The role of runes was to enhance these details. Like a river with countless tributaries, the originally insignificant branches were artificially enhanced. When they finally merged back into the main river, all the enhanced tributaries combined to burst forth with unparalleled power.
"There are two levels of rune integration into formations," Lin Moyu mused. "The first level uses runes to enhance the array itself, with the runes playing an auxiliary role. The second level allows runes to not only enhance the array but also form an independent array, truly realizing the fusion of runes and arrays. Undoubtedly, the second level will be much stronger, but the difficulty will also be much greater."
Lin Moyu reflected on his previous attempts at fusing runes and arrays. "The rune fusion array I achieved before was actually at the first level. Those runes only played an auxiliary role and weren't truly independent arrays."
The same principle applied in reverse. If the rune array was the main body, the formation would in turn assist the array. Both approaches were similar. Lin Moyu sighed, "The path of arrays is long and boundless. How many can reach its end?"
Throughout history, countless array masters had come and gone, with only a handful reaching the ninth level. But was the ninth level truly the limit? In Lin Moyu's opinion, not necessarily. If formations had a limit, the first boundary must be standing on the avenue of the Dao itself.
Lin Moyu's vision and insight were now comparable to those of ordinary practitioners. Runes flew from his fingertips one by one. These runes were not powerful, but basic and practical, each with a single function to enhance specific details of the formation.
In Lin Moyu's view, the more complex the runes, the better, but they had to be suitable. Soon, in his soul world, every corner of a thunder formation was filled with runes. Lin Moyu used soul power to simulate the integration of runes into the thunder formation, and everything seemed normal.
However, he knew that real-world testing was necessary, as soul simulations were not completely accurate. After carefully checking again and ensuring there were no problems, Lin Moyu began to arrange the thunder formation in reality.
He did not directly modify the existing formation group but arranged another one separately. This precaution was to avoid causing a chain reaction in case of any issues. After only half a day, a beautiful and powerful Thunder Formation had been set up. However, Lin Moyu did not activate it immediately, letting it remain dormant.
Then, Lin Moyu began to draw runes, and simple yet practical runes flew out and merged into the Thunder Formation. In the blink of an eye, the Thunder Formation was filled with tens of thousands of runes. The runes shone, giving the entire Thunder Formation a distinct appearance.
"Let's try it!" Lin Moyu thought, activating the rune-filled Thunder Formation.
The sky, which had been clear, suddenly darkened. A ray of lightning appeared in the dark sky. The next second, a loud bang resounded, and a thunder dragon fell from the sky, striking the Thunder Formation full of runes.
The Thunder Formation was completely activated in the roar, and a thunder dragon rushed out of the formation, flying and roaring in the air. A few seconds later, the thunder dragon swallowed the dark cloud in one bite and then rushed back into the Thunder Formation, disappearing.
"The power is very good, not inferior to a sixth-level formation," Lin Moyu observed. A sixth-level formation could already threaten ordinary Dao Zun cultivators. While it might be difficult to kill them, it was enough to pose a significant threat.
Lin Moyu mused, "If the entire group of Wrathful Thunder Formations can be filled with runes, the power may truly make even the enemy's leaders retreat without a fight."
As he was thinking, Lin Moyu inadvertently glanced towards the city in the valley and couldn't help but show surprise. The city was already quite large, and its structure, similar to the God City, exuded an exotic style completely different from ordinary human cities.
But what surprised Lin Moyu was not the city itself, but the six Tian Zun cultivators. The six, including Hao Tian Zun, sat on the ground in various postures. Even the only female Tian Zun and Jian Tian Zun were in somewhat undignified positions. All six looked at the sky with expressions of awe.
Lin Moyu chuckled, guessing what had happened. When the formation was activated, the pressure from the thunder dragon had reached the realm of Dao Zun. The pressure from a Dao Zun was not something that Tian Zun cultivators could easily bear, hence their current state.
As for himself, Lin Moyu had long been accustomed to Dao Zun power, having killed many such cultivators, so he felt nothing unusual. Lin Moyu simply smiled and said nothing. It wouldn't hurt to let the six experience the power of Dao Zun; it might even arouse their competitive spirit. Often, only when one sees the summit can they find the courage to run towards it.
The Thunder Formation had successfully integrated the runes, albeit only at the first level. Still, the return was sufficient. Lin Moyu began to modify the formation group, and a large number of runes flew out at once, merging into the Thunder Formation.