The fourth layer is a world of thunder, and the entire space is filled with the power of thunder and lightning, and there are silver lightning bolts falling and rumbling sounds!

Seeing the scene in front of him, Zhou Yifeng was overjoyed, since he summoned that black thunder arc in the Sky Illusion Realm, Lei Yuanzhu's energy has not been replenished, and he is also missing one of the most powerful hole cards!

As soon as he felt the violent thunder breath, he rushed out with a "whoosh" without waiting for Zhou Yifeng to make a sound, just like a bachelor who has been doing it for decades and sees a beauty!

As soon as Lei Yuanzhu rushed out, the thunder and lightning in that space were pulled, and suddenly several lightning flashes around him, slashing towards Lei Yuanzhu!

But these thunderbolts did not pose any threat to Lei Yuanzhu at all, and they were all incorporated into the internal space, and even deliberately exuded traction in order to attract more thunderbolts! For a while, Lei Yuanzhu was surrounded by dozens of thunderbolts, forming a huge thunderball in mid-air! And the originally dense thunder and lightning actually appeared to be sparse.

Zhou Yifeng also wanted to try the power of this thunderbolt, except for absorbing and refining thunder and lightning on the earth, after coming to the cultivation realm, he never absorbed the power of this heaven and earth.

After taking a few steps, Zhou Yifeng tried to draw a thunderbolt down, and at the same time run the Tianyan Thunder Technique, and found that this thunder and lightning seemed to be more powerful than the spiritual power contained in the thunder and lightning on the earth!

Since Zhou Yifeng's current cultivation has been strengthened too much compared to that time when he was in the South China Sea of the Earth, his refining is also much faster. And he also found that the true yuan obtained by refining thunder and lightning was even more condensed! Even after promotion, he didn't have any feeling of unstable foundation.

Therefore, Zhou Yifeng no longer had scruples, and also began to absorb frantically!

On the fourth floor of the Nine Sources Tower, there was a stunned scene, one person and one bead were frantically connecting thunder and lightning here!

And Yuan Lao, who was originally bored, once again paid attention to Zhou Yifeng's situation here on the tenth floor of the Nine Sources Tower. When he saw such a scene, he also showed an incredible color!

This layer, although in ancient times, there were also many disciples who passed, but all of them followed the most sparse place of thunder and lightning and passed quickly. Where there is a situation like Zhou Yifeng now, where there is a lot of thunder and lightning, run wherever you go!

And that bead, which can be described as swallowed by a whale, and the thunder and lightning are directly absorbed by it!

Squinting his eyes slightly, Yuan Lao mobilized the power of the Nine Sources Pagoda to observe carefully for a while, and his expression, which was originally just a little surprised, immediately turned into a look of horror:

"Lei Yuanzhu! How is it possible?"

As a machine spirit that had existed for an unknown amount of time, of course he knew about Lei Yuanzhu. And he also knew that this Thunder Source Bead was originally a thing of Lei Zu!

But now he saw Lei Yuanzhu, still with such a kid, and he could also see that this Lei Yuanzhu seemed to be a little damaged, and it didn't look like a chaotic spirit creature at all!

Could it be that something happened to Lei Zu?!

This thought set off a storm in his heart: Who is Lei Zu? That is the person who stands at the peak of the immortal realm! Who else can make him fall?

But the bead that continuously absorbs thunder and lightning in the four-layer space is definitely the thunder source bead, and he can feel the power of the thunder origin from that bead!

Moreover, as a chaotic spiritual creature, it has always been unique, and there are simply two thunder source beads between heaven and earth!

In other words, this Lei Yuan Zhu is the one that Lei Zu has!

Although he couldn't believe it, he had to accept the fact that Lei Zu had really fallen! Otherwise, this Lei Yuanzhu would never have appeared here!

Yuan Lao looked at Lei Yuanzhu in the fourth layer of the trial space again, and muttered:

"It seems that it is time to return that trace of origin power!"

Then he looked at Zhou Yifeng:

"This kid, it's not simple, not only does he have a Void Ray, but Lei Yuanzhu is also involved with him!"

Zhou Yifeng and Lei Yuanzhu didn't know anything about Yuan Lao's thoughts, and they were still on the fourth floor of the Nine Sources Tower, unscrupulously absorbing thunder and lightning to improve their strength.

Unconsciously, half an hour passed, and the thunder and lightning in this layer were much rarer, and it took a long time before a thunderbolt was generated!

Half an hour later, there was no thunder and lightning to be seen, and at this time, a roar sounded, and Zhou Yifeng followed the sound, and a lion surrounded by thunder and lightning appeared in sight, roaring at him non-stop!

"Thunderbeast!"

Zhou Yifeng knew that the final trial of this layer had appeared!

Feeling the cultivation that was almost at the peak of the seventh layer of the foundation, Zhou Yifeng let out a clear roar, and the thunder dragon spear appeared in his hand, raised it high, like a stick, picked it down, and smashed it into the lion-shaped thunder beast!

The thunder beast also roared, and did not avoid it, and rushed straight over, actually trying to shake the thunder dragon spear!

With a "boom", the spear smashed firmly on the top of the thunder beast's head, making it stagnate, and it took two steps back, with a fierce light in its eyes!

Zhou Yifeng only felt a huge force coming from the thunder dragon gun, his body was blasted out more than ten zhang away, his chest was as if he was hit by a hill, and a mouthful of blood spurted out, and his face became pale!

Hurriedly sent a healing pill into his mouth, and with a thought in his heart, the Zhentian Monument was already grasped in his hand, and after activating the two prohibitions, he shook his hand and threw it out, smashing it towards the attacking thunder beast!

"Zhentian Monument!"

Yuan Lao exclaimed again! This kid, how many hole cards do you have? Void Ray, Lei Yuanzhu, and this Zhentian Monument, any of them, if you take them out, they will cause a bloody storm!

The thunder and lightning that was originally used as food by itself was absorbed by Zhou Yifeng and Lei Yuanzhu, which made the thunder beast angry in his heart, and then it was smashed in the head by that shot, which made it even more angry, watching Zhou Yifeng being repelled by himself, and wanted to take advantage of his unstable foothold to kill again!

I didn't want to just jump up, a swarthy stone tablet fell from the sky and smashed into the top of its head again! Although it felt the danger, but now that it was in mid-air, it was no longer able to borrow strength, so I had to raise my claws and face the Zhentian Monument that was smashed!

The tens of millions of catties of Zhentian Monument, under the extreme speed of the flight, burst the air and fell straight down!

With a "boom", the thunder beast was smashed to the ground, and the thunder arc on its body was much thinner!

Before it could get up, Zhou Yifeng controlled the Zhentian Monument to fall again! At the same time, Lei Yuanzhu conjured up the size of the house and suppressed it!

The poor thunder beast, which had no power to fight back at all, had been blown out of its body, turned into a trace of thunder arc, dissipated, and was all absorbed by Lei Yuanzhu and Zhou Yifeng!

After the thunder beast dissipated, the reward stone platform reappeared along with the portal, and this time the stone platform was still a jade box!

Zhou Yifeng no longer hesitated, walked forward directly, picked up the jade box, and his heart was full of anticipation!

The jade box opened, and a thunderous bead appeared in sight, exuding a violent aura.

Zhou Yifeng was stunned for a moment, Lei Zhu, wouldn't it? How could this thing be worthy of a fourth-layer reward! For him, this Lei Zhu had no value, not to mention that it was not as good as Wind Pattern Grass, and even Pei Zhen Dan was not as good as it!

Wrong!

According to the reward setting, the quality of the prize should increase layer by layer, and the prize of this fourth layer will definitely not be a simple thunder bead!

Zhou Yifeng held up the thunder bead, and his divine sense swept it in:

"Ahh

This moment, his eyes suddenly widened, and inside the thunder bead, there was a black thunder arc!