After Wei Wuji rested and recovered, his body swept towards the cave.

A figure came out of the cave, the figure of a middle-aged scribe. He sensed Wei Wuji and walked out.

"Senior, I've already taken the key to Thunder Pattern. Wei Wuji stepped forward and took out the key to the thunder pattern and motioned to the middle-aged scribe.

The middle-aged scribe stepped forward, looked at the key of the thunder pattern with a pair of blood-red eyes, reached out to hold it in his hand, and turned around and walked towards the cave. Wei Wuji followed closely behind and walked in as well.

Before coming to the stone gate, the middle-aged scribe put the key of the thunder pattern into the round hole, let go of it.

Click, two soft sounds, the key of the thunder pattern inserted in the round hole, actually turned slowly, and the whole body fluoresces, like a pillar of light. A majestic aura rose from the stone door, and the dust on the door fell in a stream, revealing the cumbersome runes engraved on it.

The light of the Thunder Pattern Key stretched out in all directions along the rune trail on the stone gate. In an instant, all rune trails glowed. The runes on the two stone doors were all displayed in front of Wei Wuji.

The whole stone gate looks like it is completely devoid of the dust and decline just now, and in the divine light, it exudes a vast momentum, just like the gate of immortal light in ancient times.

Wei Wuji looked at the cumbersome runes on the two gates, and his face also showed a look of shock.

At this moment, the key of the thunder pattern retreated from the stone gate and fell into the hands of the middle-aged scribe.

Bang! The two doors opened to the side, and the fluorescence on the doors slowly faded, revealing a passage behind them. An innate thunderous aura rushed out of the passage.

"Innate aura! Pure innate thunder aura, without the slightest mixture. If you can use such an innate thunder to refine the root bones and cultivate the Creation Sutra, it will be ten times better than the outside world! What the Great Hall Soul Cultivator said is indeed true. Wei Wuji felt this thunderous breath, and his heart was shocked.

The middle-aged scribe looked at the key of the thunder pattern in his hand, waved his hand lightly and threw it away, and the key of the thunder pattern flew towards Wei Wuji. Then, he turned and walked towards the passage behind the gate.

Wei Wuji took the key to the Thunder Pattern, put it away, followed the middle-aged scribe, and walked into the passage. The stone door behind him slowly closed and closed.

In the passage, the aura of innate thunder is even stronger. Tiny arcs of electricity flashed on the cave wall from time to time, like fireflies on a summer night.

Wei Wuji followed behind the middle-aged scribe, and the further he walked along the passage, the more intense the aura of thunder became.

The trace of thunder breath that filled the void seeped into the skin from the pores, making Wei Wuji's whole body numb, and he had an urge to immediately sit down and exercise and refine the root bones.

"Standing here, I don't know what it will be like at the end of the line. Wei Wuji followed the middle-aged scribe and continued to walk forward.

A moment later, the two walked through the passage and came to the entrance of the cave.

Wei Wuji saw a snow-bright white light in the direction of the cave entrance, and even his eyes, which were accustomed to thunder and lightning, felt a tingling pain. He hurriedly closed his eyes, ran the exercises to adjust his eyes, and continued to walk forward.

Walking out of the cave, Wei Wuji saw that there was a huge cave outside, and he couldn't see the edge at a glance. Above the top of the head is a rock that looks like a dome. In front of him was a vast and vast lake, and there was not water in the lake, but thunder. As the soul cultivator told him, behind the gate was a lake of thunder.

The innate thunder is like a lake, quietly condensing there, like a huge light source.

One after another, the innate thunder breath emanated from the light source, like a layer of waves, rippling outward. If it weren't for Wei Wuji's body, he could fuse with thunder and have the essence blood of the thunder clan. When you step into the cave, you will be blasted into powder and reduced to ashes by the power of the supreme thunder.

For ordinary cultivators, the Thunder Lake in front of them was undoubtedly a place of death. But in Wei Wuji's eyes, it was tantamount to a huge spirit stone, an excellent cultivation resource. Shocked by what he saw, he stood still, motionless.

The middle-aged scribe was silent, slowly walking into the thunder lake, walking step by step, until it was not topped, and sank into it.

It took a while for Wei Wuji to retreat from the shock of great joy.

He stepped forward, walked over to Thunderlake, and reached into the light source.

In the thick thunder, there is no texture of an object, and it feels as if it is stretched into the clouds. It's just that what is felt in the clouds and mist is moist water vapor, but what is felt here is the power of thunder.

Wei Wuji continued to move forward, and also walked into the Lake of Thunder, sinking into it.

Submerged in the Thunder Lake, Wei Wuji felt as if he was walking in the vast mist. In this piece of innate thunder, the divine consciousness and mind were strongly compressed, and it was difficult to extend out. He tried, but at most ten zhang of distance, it was difficult to continue, and he could not extend any further.

The middle-aged scribe was nowhere to be seen, and Wei Wuji groped forward alone, finding a place to sit down.

He sat upright with his eyes closed for a while, then took out the jasper gourd, hid it in the sand and stone, and then entered the gourd fairyland and comprehended the thunder rune technique in the key to the thunder pattern.

The art of thunder runes is mainly to cultivate the ability to control thunder and use thunder arcs to outline runes. There are also some magic circles and attacks.

"With this, I can use the rune formation to gather the power of thunder to refine the root bone!"

Wei Wuji comprehended the artistic conception of Thunder, fused the essence and blood of the Thunder Clan giant, enhanced the affinity with Thunder, and could ignore a certain degree of Thunder Strike. But he had no way to gather and condense the thunder and compress it to a certain extent, which was used to refine the root bones.

Among the sects, there is a magic circle that can be used to condense thunder, but the cost is too high, and a large number of spirit stones are needed, and the gains and losses for cultivation outweigh the losses. The magic circle in the key of the thunder pattern does not need spirit stones, and it can also detain thunder, but the effect is ten times better than the magic circle of the sect!

"This kind of rune array surpasses the rune technique of the sect, there are too many! I didn't expect that the Lei Sect thousands of years ago would have such a mysterious magic array. ”

Wei Wuji was surprised, and there was also a trace of confusion: they are also sects, why is there no Guiyuan Sect, and the Lei Sect will have such a mysterious magic circle?

Naturally, there is no answer to such a question.

Wei Wuji didn't bother to think about these thousand-year-old puzzles, what happened to Lei Zong had nothing to do with him. At the moment, the Thunder Rune Technique is of great use to himself, as long as it is useful, everything is fine.

He entered the gourd fairyland and began to practice the art of thunder runes.

If it is an ordinary person's cultivation, it is estimated that it will be difficult to succeed in cultivation for a hundred years. But for Wei Wuji, who has the essence blood of the Thunder Clan, it is not that difficult. In the three years of the gourd fairyland, it was only three days in the outside world, and Wei Wuji was all repaired.