The opening up of the third heart trick caused Xiao Mo's cultivation speed to suddenly surge.

If it was said that when cultivating the heart element, the cultivation speed was one, now it is at least one point five, or even two.

With the original second-skill qualifications, if Xiao Mo wanted to cultivate to the early stage of the health realm, it would be ten years, and now it might only take seven years, or even five years.

The changes between these are visible at a glance.

Therefore, the impact of adding a new heart trick on Xiao Mo is huge and far-reaching.

Opening his eyes and looking around, Xiao Mo's eyes couldn't help but be full of amazement.

The power of refining the heart chamber is indeed true, and the cultivation and enlightenment in it does have magical effects that ordinary people can hardly imagine.

Think about it, in the wind stop Jingshe, Xiao Mo worked "Zhao Theory" and "Reassuring Map", but he didn't gain anything. But after entering here, in less than ten days, he successfully understood the secrets of a book and a picture, broke through the realm of Qiwu, and opened up a third mind, greatly increasing his strength.

Among them, the role played by the heart refining chamber cannot be erased.

However, Xiao Mo's heart refining room access token has a full one-month period, and it is impossible to come again if he enters it once.

Therefore, even though the goal has been achieved, Xiao Mo has broken through the Qi Realm of Things, and even unexpectedly opened up the third mind, but Xiao Mo did not stop there and left.

The rest of the time, he also has to make good use of it and will not waste it.

So, after only a moment of silence, Xiao Mo cleaned up his mood and began to continue cultivating.

With a wave of his hand, a pale cyan secret book suddenly appeared in his palm, and a large black flower was carved on the pale cyan secret book.

This secret book is the special sound attack secret technique that Xiao Mo spent 300,000 meritorious services to exchange from Zhenlong Palace, and the spirit-level inferior "Mysterious Howling".

Others call it "Mirage"!

Before, Xiao Mo spent a lot of time cultivating the Void Heaven Thunder Step, but his cultivation had reached the ninefold peak of the Freedom Realm, in order not to stagnate his cultivation and waste time, Xiao Mo came here to refine the heart chamber first and break through the realm of Qiwu.

Originally, I thought that even if it was a month, it might not be enough, but I didn't expect that this heart refining room was worthy of being a cultivation treasure land that could only be used by high-level monks in the Daoist Palace.

Therefore, for the remaining twenty-one days, in order not to waste time, Xiao Mo naturally wanted to take out this neglected secret book of "Mysterious Howling" and take it out for enlightenment and cultivation.

Opening this pale cyan ancient book, Xiao Mo's eyes fell on the detailed interpretation of "Mysterious Howling".

An hour later, Xiao Mo finally finished this secret book.

Immediately, he closed the scroll and began to think.

From this "Mysterious Howling" secret book, he finally knew what was the secret technique of sound attack, and what was the difference between it and other heart techniques?

There are so many attack heart skills in the world, how can sound be used as an attack and carried forward?

And in order to understand why the secret technique of sound attack, we must know, what is sound?

Sound refers to the moment when an object begins to vibrate, while sound refers to the process by which sound travels.

Sound is the starting point, the moment of explosion, and sound refers to the wave formed after the sound bursts, so it is also called sound wave.

Sounds come together to become syllables that people hear in their daily ears.

So, if you want to understand how sound can be powerful and become a weapon against others, you have to understand that there are different sounds.

Normal sounds, such as human speech, water dripping, and light breezes, do not cause much harm to the human body, and it is even more impossible to attack others as a weapon, but that refers to normal sounds.

If the frequency of the sound is exceeded, the result is very different.

All things in the universe, including the interior of various life forms, are constantly vibrating and fluctuating, so appropriate sound waves are not only harmless to people, but may even have the effect of promoting qi and blood circulation and health and healing.

Like the melodious flute sound, Qingyue's guzheng can not only soothe people's spirits, boost people's emotions, and even have the ability to prolong life. However, the harsh sound can be annoying, even painful.

This book "Mysterious Howling" uses its principle to combine some syllables that are not suitable for ordinary people to hear, and even feel uncomfortable and painful when they hear them, and the sound they make has the power to kill.

These syllables are unique characters, and many characters are combined together through different permutations to form a string of sound waves, which is the mysterious roar.

As long as a practitioner memorizes these notes, learns them, and can use their mouthpiece to induce them to come out, then they will be able to attack others.

When the character slows down, the attack is soothed, and when the character is shortened and the volume increases, the sound is shorter and more destructive.

Thinking of this, Xiao Mo looked at the secret book in front of him, "Mysterious Howling", and his expression became calm.

This book of secret techniques of sound attack, 'Mysterious Howling', records a total of 33 unique sonic characters.

These characters, one by one, are very peculiar, like dragons, they don't look like words, but more like ghost drawings, if ordinary people see them, they will definitely not be able to memorize and understand them, because they don't know their pronunciation at all.

But since it's a secret, there are naturally ways for people to interpret it.

Next to these dragon-shaped notes, their pronunciations are marked separately, so although it was very difficult to remember at first, as the characters slowly became familiar, Xiao Mo finally discovered the beauty of these characters.

It took three days and three nights for Xiao Mo to memorize all the characters and all the thirty-three notes in his mind, like thirty-three little dragons with different expressions, rolling in the soul world.

However, although there are only thirty-three notes, there is not only one way to make a sound, but a total of nine.

Thirty-three characters through different permutations and combinations, forming nine sounds of different lengths, this is the true meaning of 'Mystic Howling', otherwise, even if you know the thirty-three notes, it is useless, just like only learning to split, tease, stab, slash and other postures, but will not combine them into moves.

Thirty-three notes, arranged and combined, naturally there are more than nine patterns, but the owner who created the secret of "Mysterious Howling" should have tried thousands of combinations, and refined these nine most powerful and special sound wave chains, and then recorded them.

Nine groups of characters, each on behalf of a function, just like a boxing scripture, in which the moves are not the same, if this mysterious roar, as a boxing scripture, then these nine groups of characters, is the boxing of nine different moves.

The first group, called 'Dragon Yin Valley', after it was issued, the voice was low, tactful, and the initial power was not strong, but in the later stage, the sound became more and more dull, like a volcanic eruption, and finally it was full of echoes in all directions, and suddenly erupted together in the form of a ring belt, and it is said that the cultivation was extremely extreme, and finally even a mountain could collapse.

The second group, called 'Dragon Roar Nine Days', after the sound, the sound is like a dragon's roar, directly rising, suddenly erupting, the power can be called extremely great, between a roar, the real dragon soars to the sky, can stun a group of people.

The third group, called 'Thousand Dragons', made a sound like a thousand dragons roaring at the same time, but the syllables were much softer and soothing. Its attacks come in waves, and if you think it's too powerful at first, you're going to taste the bitter fruit in no time.

Group 4, Group 5, Group 6...... All the way up to the ninth group.

Each group has a unique name, and its power is not the same, but one group is more difficult than the other, and if you want to cultivate this "Mysterious Roar", you must first memorize all the thirty-three notes, and then remember the order in which they are composed.

Thinking of this, Xiao Mo didn't waste any time, and started directly from the first set of notes.

Since I had memorized these thirty-three notes before, now that I had combined them, I had to memorize the order of each group, which was still painful, but much faster.

Three days later, Xiao Mo finally memorized all the nine different sequences, and then Xiao Mo began to really try to cast the Mysterious Roar.

However, because of the special location in the heart refining chamber, Xiao Mo did not dare to let out a long howl, otherwise, if the destructive power of the Xuan Xiao was really as amazing as he introduced, this refining chamber might be destroyed by him.

If Xiao Mo really dared to do that, it is estimated that he would only be able to spend the rest of his life in prison.

After all, this heart refining chamber took the painstaking efforts of many predecessors of the Dao Xue Palace, and it is the important place for those elders and deputy mountain elders of the Dao Xue Palace to cultivate, with a great role and a noble status, if it is destroyed by Xiao Mo's third-generation disciples, it is self-evident how serious the consequences will be.

If the Lord of the Confession Hall knew, it was estimated that he would have the heart to kill him directly with a sword, it would have been hostile, and it would be good if Xiao Mo could not be deliberately framed, it would be impossible to make his subordinates merciful, Xiao Mo would be cold for the rest of his life.

Therefore, Xiao Mo only dared to try softly, using his lips to utter independent syllables one by one, and the voice was extremely low, which would definitely not cause any damage.

In doing so, the cultivation speed is naturally extremely slow, and you can't feel its specific power, so it's difficult to compare horizontally.

However, Xiao Mo is not in a hurry, he is just trying to keep these nine groups of combinations in his heart, master the vocal skills that are familiar with them, and when he leaves the refining chamber, he will naturally practice real cultivation again.

Memorizing the notes does not mean that you can really make its sound, after all, these dragon-shaped notes, one by one, are very esoteric and unpredictable, and it is one thing to memorize them, and it is difficult to find out when you really get started.

It took four days for Xiao Mo to finally be able to use his guttural voice to make thirty-three notes softly, although he couldn't see the power because it wasn't a real sound, but Xiao Mo was already very satisfied.

It took another day to familiarize himself with the syllables after their combination, and this "Mysterious Howling" was a preliminary introduction, Xiao Mo looked up, and suddenly woke up, it had been almost twenty days since he entered the heart refining room.

There were still ten days left, and he couldn't waste it, so Xiao Mo put away the secret book of "Xuan Xiao" and began to cultivate directly in it, consolidating the early realm of the Qi Realm, and trying to hit the bottleneck of the great success of the Xuan Ming True Skill.

Breaking through Qi Wu, although it can in turn act on his exercises, but the Qi Wu Realm is a little different from other realms, it is more of a breakthrough in the state of mind, and it does not have much impact on his exercises, so although the Xuan Ming True Skill has improved, it is still the peak realm of Xiaocheng, and there is still a short distance from Dacheng.

The Xuanming Heart Yuan was running slowly, and the momentum on Xiao Mo's body was increasing point by point, although he did not officially break through the Xuanming True Achievement, but the cultivation in the early stage of the Qi Matter Realm was completely consolidated, and he was one step closer to the true Xuanming True Achievement.

I believe that as long as you persevere and practice unremittingly, it won't be long before Xiao Mo can truly break through.

And once the Xuanming True Skill is completed, it will react on Xiao Mo, and his cultivation will naturally rise and reach another height.

Thinking of this, Xiao Mo was more motivated.

Ten days passed in a flash, and in the blink of an eye, the time for Xiao Mo to enter the heart refining chamber was over, and with a soft sound of "dong" above his head, like a morning bell in the evening, Xiao Mo suddenly woke up from the deep retreat.

PS: I'm so sorry for being delayed by some trivial matters these days. From today, there will be more than two changes today, and this is the first change.