The information that Tianqiaoyu had done everything possible to pass on to Chu Duan finally arrived.

"Xuanji Wudao's sister Xuanji Wuyue......" After knowing the Dao, Chu Duan remembered this information, but he didn't care very much.

"Thundercloud Storm!"

A sword swung out, rumbling, there was a terrible tornado raging, Zhong Muchen's face was full of solemnity, and he used the light whirlwind thunder wave confrontation, under the confrontation with each other, the two moves and four-grade sword skills continued to wear out, and finally the light whirlwind thunder wave disappeared first, and the weakened thundercloud storm rushed towards Zhong Muchen, which was offset by Zhong Muchen's one-move and second-grade sword skills.

This is in Chu Duan's Shizhong Building.

The ban on Shizhonglou can indeed resist the bombardment of the thundercloud storm, but the floor will be destroyed, so the thundercloud storm cast by Chu Duan was not infused with the sword element, and even the sword intent and the four mysteries were only controlled at the level of five turns, only releasing the thundercloud storm's intent, which seemed to be dark.

Similarly, Zhong Muchen also controlled the power of the Thunder Flame Wave, which was similar to the thundercloud storm in all aspects, and under mutual confrontation, the power was comparable, but Chu Duan's sword intent, with a trace of immortality, was still superior in the end.

"Senior Brother Chu, the comprehension and mastery of the four-grade sword technique has caught up with me. Zhong Muchen sighed.

What is a genius, this is a genius, standing alive in front of his own eyes.

It took him several years to constantly refine and sharpen the Light Swirl Thunder Flame Wave to this point, but the person in front of him only spent three months mastering and controlling the four-grade sword technique to the same level as himself.

"If I didn't have Senior Brother Zhong's help, I'm afraid that the time I spent would be doubled. Chu Duan said with a smile, this is the truth, in the past three months, they have fought with Zhong Muchen every few days, in order not to destroy Shizhonglou, they did not inject the sword element, but only used the sword technique to fight. In this way, we will continue to deepen our understanding and mastery of thundercloud storms.

After a few days, he fought with the intent of the four-rank sword technique, Chu Duan's sword intent contained a trace of immortal essence, so that his sword skill could last for three breaths longer, and under the repeated confrontation, it also brought some insights to Zhong Muchen, making his mastery of the light whirlpool thunder Yanbo more and more deep, more and more perfect, and the strength of the force more condensed. The higher the rotation speed, the more impact.

"I can't help you with the thunderstorm anymore. Zhong Muchen sighed, his tone was very complicated, happy and gloomy.

"Although I can't help in the thundercloud storm, in other four-rank sword skills, Senior Brother Zhong can still help me. Chu Duan smiled.

"The other four-rank sword skills...... Don't...... Could it be ......" Zhong Muchen's face was full of shock, his eyes stared at Chu Duan, and his fingers trembled: "Do you still have a second move and four grades...... Swordsmanship?"

This thought shocked Zhong Muchen very much.

Chu Duan has been a disciple of the Cupola Academy since he became a disciple. It was a year and three months, and it was three months ago that he became the chief senior brother of the Cupola Temple in a battle with himself, that is, within a year of becoming a disciple of the Cupola Temple. Chu Duan created a four-grade sword technique, and at such a speed, although he did not break the record of the Flying Heaven Pavilion, he could also rank among the top ten.

Within a year. To create two moves and four sword skills, for all generations, it seems that only Senior Brother Qin Tianyi has done it.

Agitated. I was very excited in my heart, Chu Duan was once again comparable to Senior Brother Qin Tianyi in a certain item.

If he knew that Chu Duan had actually created two four-rank sword skills in a year, but three moves, he would probably have fainted.

"Your second move, the Fourth Rank Sword Technique...... What is it?" Zhong Muchen asked after a while.

"It's a purely defensive sword technique. Chu Duan said: "Next, Senior Brother Zhong, you will use all your strength to attack me, and I will use the four-grade defensive sword technique to defend, and my comprehension will be deepened in defense." ”

"Good. Zhong Muchen hurriedly said, gathered his sword momentum, and once again cast a light swirl thunder wave, and in the sharp whistling sound, it rushed out, the space seemed to be broken, and the entire sword tower was trembling.

Chu Dui's divine light was clear, he stood straight, holding the hilt of the sword with both hands, standing in front of him, the whole person was like a sharp sword in the sky, all kinds of mysterious powers emerged from the body, entangled around, the human sword was one, and in an instant, in Zhong Muchen's eyes, Chu Duan seemed to have become a mountain, an eternal mountain, an immovable mountain.

Four-grade defensive sword skills: immobile as a mountain!

Calm, hard, unshakable.

Allowing the all-out attack to be powerful and terrifying, the thunder and flame waves of light continued to impact, Chu Duan's figure did not move a bit, like a mountain, eternal and immortal.

When the power of the light whirlwind thunder wave was exhausted, Chu Duan's figure shook and took three steps back.

"What a strong defensive sword skill!" Zhong Muchen was stunned.

The sword master attacks, therefore, the creation of offensive sword skills is easier than defensive sword skills, resulting in defensive sword skills are more precious than attack sword skills, and similarly, defensive sword skills of the same level are often able to resist the attacks of most attacking sword skills without breaking, unless it is a special very strong attack sword skill.

The power of the Swirling Thunder Wave is very strong, but it still can't break through the immovable mountain.

After all, Chu Duan's defensive sword skills were not perfect enough, and the degree of perfection of the Vortex Thunder Yanbo far surpassed that of the immovable Thunder Wave, and when the perfection of the Immovable Thunder Thunder Wave reached the level of the Vortex Thunder Flamewave, the Vortex Thunder Wave was helpless at all.

Performing the four-grade sword technique, the consumption of the sword yuan is very large, and the consumption of the power of the divine mind is not small, the previous confrontation has consumed a lot, and then, the two of them recovered.

After recovering, Zhong Muchen continued to cast the Cyclone Thunder Flame Wave attack, while Chu Duan cast an immovable mountain defense.

Confrontation again and again, for the comprehension of immovable like a mountain, deepened little by little, Chu Duan's harvest was great, and Zhong Muchen's harvest was not small.

Later, after an interval of about five days, Zhong Muchen took the initiative to come to Shizhonglou to find Chu Dui, and spent a day using his sword skills to fight, and then returned to his sword tower to comprehend and absorb, and Chu Dui also took the opportunity to constantly modify and strengthen.

In the five days between them, in addition to the comprehension of the defensive sword skill that is not moving like a mountain, the comprehension of the thundercloud storm has not fallen, and the body sword skill Rainbow will also be used a few times, although the progress is the slowest, but it is also gradually improving.

Day by day, the three moves and four sword skills gradually perfected and deepened.

The intermediate sand of time, Chu Duan has not used it yet, he plans to improve the three moves and four grade sword skills first, and then go to the Pingtian Courtyard to challenge after reaching a certain level, after sweeping the Pingtian Courtyard, realize the wish of the Cupola Courtyard to soar into the sky, and after that, calm down and use the intermediate sand of the time to improve the alchemy technique.

......

In the fourth month, in the middle of the stone building, Zhong Muchen once again cast the light swirl thunder flame wave, which was more condensed, faster and more powerful, and the air seemed to be pierced, leaving a faint trace.

The terrible impact hit Chu Duan's body, and Chu Duan seemed to turn into a mountain, immovable, and unbreakable.

The sharp sound roared out in the collision, and countless sparks were as bright as fireworks on a summer night, shooting in all directions, Chu Duan's body did not move at all, the sword in both hands was erected in front of him, his eyes did not blink, and the breath of the whole person and the sword in his hand fused into one, turning into an eternal sword mountain.

With the last blow of the light whirlwind thunder wave, Chu Duan's body still inevitably shook, his steps shook, and he almost took a step back, although so, it was a significant improvement compared to taking three steps back in a month.

You must know that Chu Duan's sword skills are improving and improving, and Zhong Muchen's sword skills are also improving and improving, although the progress is not as good as Chu Duan, but it is indeed improving and improving, the most important thing is that Zhong Muchen only has one move and four sword skills, and he can only use this sword skill, and again and again, it will be more profound.

"Senior Brother Chu, your defensive sword skills have become even more perfect. Zhong Muchen smiled, with admiration.

"Being able to enter the country like this is inseparable from Senior Brother Zhong's help. Chu Duan also smiled.

In the fifth month, it was still in the stone building, and it was still Zhong Muchen and Chu Duan, standing opposite.

The same four-grade sword technique, the Light Swirl Thunder Flame Wave, was once again unleashed from the sword, the sound was sharp to the extreme, and in front of the Light Swirl Thunder Wave there was an awl-shaped sharpness, which was like a drill bit under the high-speed rotation.

Chu Duan's eyes flashed with an astonishing coldness, holding the sword in both hands, standing in front of him, the sword intent condensed and gushed out, and the human sword was one, immobile like a mountain.

People seem to have turned into an eternal mountain, standing still.

The Swirl Thunder Flame Wave hit Chu Duan's body again, and the terrifying collision sounded with a terrible whistling sound, and the force that was as immovable as a mountain blocked the impact of the Swirl Thunder Flame Wave, causing the Swirl Thunder Flame Wave to shatter.

Until the power of the Swirling Thunder Flame Wave was exhausted, Chu Duan's body only shook slightly, and his footsteps did not retreat a bit.

"Come again. Chu Duan's voice was low, and there was a pressure as thick as a mountain.

Zhong Muchen nodded, he understood what Chu Duan meant, he was planning to try the defensive limit of the defensive sword technique of the immovable mountain move, and how many four-grade sword skills could he withstand.

Once again, he cast a light whirlwind thunder wave, and once again rushed out, but he was still resisted by the immovable mountain, and Chu Duan's figure shook slightly, and his footsteps still did not retreat.

Immediately afterwards, Zhong Muchen made his third move, and another light swirl thunder wave bombarded out.

Under the third light whirlwind thunder and flame wave, Chu Duan's figure shook obviously, he looked serious, his hands held the no-return sword hard, and he resisted the impact with immobility, and when the power of the light whirlwind thunder wave was consumed, Chu Duan's figure also stopped shaking, and most of the defensive power on his body was also disintegrated.

Now the defense ability of the mountain is not moving, and it can only withstand three ordinary four-rank attack sword skills, and the fourth move will be injured by the broken person.

However, there is still time to continue to improve.

The sixth month, that is, half a year after Chu Duan became the chief senior brother.

"Senior Brother Chu, my Light Vortex Thunder Flame Wave is only one line away, and it can reach the point of perfection, and its power is much stronger than before, you have to be careful. Zhong Muchen said.

"Come on. Chu Duan said.

The whistling sound sounded first, and before the sword skill came out, a vision was born.

With a sword swing, the light swirls thunder and flame waves, earth-shattering, it looks smaller than before, the impact speed is faster, the speed of rotation is faster, the force is more condensed, and the power is significantly improved, and Chu Duan's immobility is like a mountain, and he also does not stand still. (To be continued......)