It suddenly rained, and Xu Dong wanted to quickly cover the tube tiles, so as not to wash the hall to the ground.

He reversed the qi, and more than a dozen roof tiles "poof!" went up, "Bang Dong!", but one of them fell down and smashed onto the stone steps and shattered.

"When sending out a reversed airflow, first rotate in the gas field, and then slowly exert force, one seeks stability, two seeks strength, and three seeks accuracy. ”

Xu Dong thought that it was the Imperial Sword Master who spoke, but when he looked back, there was someone else who spoke, it was the old man in black who he had seen in Fucha Yuntu that day.

The old man took a moment in the black robe, took a breath, stretched out the ten fingers of his hands, and rotated parallel to each other a foot apart from each other.

"Hey?!"

Nearly twenty tubes of tiles flew up to the roof, and the rafters were covered with brushes, leaving no gaps.

In three lucky ways, the old man in black covered the roof and closed it tightly, so that it could no longer drip into the rain.

Xu Dong was about to thank the old man for his advice, but in a blink of an eye, the old man in black came and went without a trace, and suddenly disappeared again.

He guessed that he must have received divine help, and according to the method taught by the old man, he moved the stones to make the stone and train his eyesight.

In the afternoon, when the rain was raining and the sky was clear, Xu Dong tested himself again, and he was already able to "uncover the roof and roof tiles".

"Okay, the qi layer has broken through, and it is estimated that the spiritual power in your body is enough, it's time to prepare for bidding farewell to the mortal realm!"

"Farewell to the mortal realm? Haven't I been using the foundation building liquid every day? Besides, isn't Zhao Ke already ...... Did you build the foundation quickly?"

Xu Dong didn't know much about the words of the Imperial Sword Master, since Zhao Ke could build a foundation quickly, why couldn't he directly enter the foundation building realm?

"Zhao Ke's rapid foundation building is just a kind of forcible foundation building under the action of medicinal power, also known as false foundation building, which is still far from the actual foundation building, specifically two levels away. ”

"That'...... What preparations should I make before entering the Foundation Building Realm?"

"The first step is that you have to master the corresponding martial arts, have a certain amount of attack power, and also be able to withstand the attacks of people of the same realm. ”

The Imperial Sword Master continued, "The second step is to re-nourish the sea of knowledge, and if the sea of knowledge is not strong enough, it will not be able to enter the foundation building realm. ”

He instructed Xu Dong, "You find a chance to enter the cave of the rockery, and I will teach you the thunder fire technique!"

Xu Dongcheng took the opportunity of Zhao Ke's nap and quietly walked into the cave of the rockery, and the water attribute puppet of the imperial sword master appeared.

"The Thunder Fire Recipe is also known as the 'Three Tricks of Fighting God', the first recipe is the Thunder Spirit Recipe, the second recipe is the Wind Spirit Recipe, and the third recipe is the Fire Spirit Recipe, which is a high-level martial art of the Immortal Product, matching the eightfold realm of mortal births. ”

"Practice the three tricks of thunder, wind, and fire, and you can activate your divine thoughts at any time and summon the power of thunder, lightning, wind, and fire for your own use.

"The power of the palm is like a thunderbolt, like a thousand might, like a hurricane that destroys all things, like the power of fire, devouring living beings!"

The Imperial Sword Master continued, "The Three Tricks of Thunder Spirit, Wind Spirit, and Fire Spirit are the three spirit spells in Western magic. ”

"When you recite the mantra, the thunder, lightning, wind and fire are stimulated, turning from invisible to tangible, turning into a powerful force in your body, and striking at your opponent in an instant. ”

"These three sets of moves are similar, only the subtleties are a little different, in fact, as long as you practice the Thunder Spirit Technique, the other two tricks will be basically mastered. ”

"You have to pay attention to the connections and transitions between the moves, every connection is naturally generated, and the rhythm of each transition changes. ”

As he spoke, he patiently demonstrated one move to Xu Dong.

After the breakthrough of the qi layer and the growth of spiritual power, Xu Dong's spiritual root knowledge has improved a lot, no matter what kind of exercise knowledge, he can accept it twice as fast as before.

The Imperial Sword Master said, "The Three Tricks of Thunder Spirit, Wind Spirit, and Fire Spirit are a great technique, which will be useful for your future life, you can only be regarded as a beginner now, and your skills still need to be improved in the future." ”

"There is no end to this exercise, even if you practice it for decades or centuries, there is still room for improvement. ”

Seeing that Xu Dong had mastered the basic points, the Imperial Sword Master said, "You can practice by yourself, if you don't understand anything, ask me again, I will go and refine the warm cultivation liquid for you, and the next step is to cultivate the sea of warmth." ”

It only took more than ten days for Xu Dong to practice the thunder fire technique decently.

When Xu Dong practiced the thunder fire technique, he blocked the entrance of the cave with a heavy stone slab, and the sound insulation effect inside was very good, so no matter what you did inside, it was difficult for people outside to hear the movement.

Besides, the place itself is very secluded, and few people usually come here.

He shouted, "Lei Lingjue, the first three and the last four, on!"

"Rumble!"

"Rumble!"

Three times in front and four times in the back, first there was a flash of electric sparks, followed by a violent explosion of thunder that rose to the ground, shaking the ground and shaking the mountains.

Looking at it again, there are three cracks on the front stone wall, and there are four cracks on the back stone wall, and the cracks on each crack surface are like spider webs spreading out from one point. ”

The Thunder Fire Recipe and the Thunderbolt Soul Sucking Palm look similar, but the difference is that the Thunder and Lightning Soul Sucking Palm uses medicinal power, and the Thunder Fire Recipe comes from the physical and mental power, showing a simple strength.

"Wind Spirit Jue, on!"

"Fire Spirit Technique, on!"

Xu Dong frequently exercised, and the hollow of the rockery was full of strong wind, thunder, and fireworks......

During this period, the Imperial Sword Master had already refined the warm nutrient solution, and Xu Dong soaked his body in the warm nutrient solution every day, and gradually, he found that he had become deaf and clear, and could perceive the changes in things within a certain range.

On this day, Zhao Ke, together with the queen mother and the other two princesses, went out of the palace in plain clothes to visit V City, and Xu Dong went into the cave alone to practice.

His Thunder Fire Technique had been practiced to the point of perfection, and he shouted, "Thunder Spirit Technique, go!" like a ground cracking and a landslide, and a big hole was blasted open in the cave wall.

In the billowing smoke and dust, an illusory scene suddenly appeared, and a thick stone door was shaken open, and inside was a bottomless cave.

Xu Dong felt strange, the belly of this rockery was actually connected to another cave, and what other places did this cave connect?

He was wondering when there was movement from the cave, "Boom!", and a strange voice gradually approached the entrance of the cave, and his heart rose to his throat.

"Roar!"

A guy with green eyes and horns on his head like a wolf came out of the hole.

"Little cub!

Xu Dong saw that it was the red-eyed beast Chaochao he had taken in, and he was so shocked that he didn't know why, he never dreamed that Chaochao would suddenly appear in front of him.

At first, he even thought that his sea of consciousness had been opened up and he could see the objects outside the palace.

"Chaochao, where are you from? Do you know how to drill through the cracks?"

When he said "drill into the cracks", he thought of "tunnel" in his heart, is there a secret tunnel leading to the outside of the palace?

There must be a passage! Otherwise, how could Chaochao enter the palace from the outside?