Ouyang Changxun's brother and sister looked at the pill bottle in Liang Feng's palm for a moment in a daze, and shouted in unison: "High-grade Zimai Pill?......! How come you have so many high-grade elixirs?"

Liang Feng said with a smile: "Of course, there are a lot of transactions without capital. Then he asked, "What's the matter? Is there a secret book for refining the 'Magic Compass'? If you can refine an ordinary 'Magic Compass', it will be done." ”

Ouyang Changxun's face changed a few times, and he slowly turned over the palm of his hand, and there was a piece of jade with excellent quality in his palm, and responded: "Yes, but at least four high-grade 'Zimai Pills' are needed." ...... Hey, hey, Senior Brother Liang, you gave me two elixirs just now...... , so why don't you give three more?"

"Okay!" Liang Feng readily agreed, the selling price of this top-grade 'Nourishing Pulse Pill' in the Holy Fire Sect was much more expensive than in the Shenmu Sect, but in fact, the cost of refining a spirit pill was less than 10 million high-grade spirit stones, so it was very cost-effective to be able to exchange the renewable spirit pill for the cheats or other treasures he needed.

So, he exchanged the pill bottle containing four high-grade 'Zimai Pills' with Ouyang Changxun's 'Skill Seal Compass' jade slip, and said with a smile: "One of these elixirs is the guidance fee, Senior Brother Ouyang, you have to guide Liang to refine the first 'Skill Seal Compass'." ”

With this secret book of the 'Magic Compass', Liang Feng felt that he would definitely be able to learn the refining of the 'Magic Compass'. It's just that he knows that his refining foundation is very poor, relying on self-study alone, it will take a lot of time and energy to learn this relatively advanced refining method, and if there is a teacher to guide him, then the learning time can be greatly shortened, so he is ready to pay a spirit pill and ask Ouyang Changxun for guidance.

“...... Alas, Senior Brother Liang, you are so polite, if you have any questions, you can always come and ask Senior Brother and me, what else do you need for guidance?" Ouyang Changxun smiled and quickly put the Dan bottle into the storage bag.

"It should be!" Liang Feng laughed, and said secretly in his heart: "When I came to Dongqi City at the beginning of the year, for the registration fee of the entry Danbi of the two thousand high-grade spirit stones, and in order to be able to learn the alchemy of the Great Dan Furnace, I tried my best and risked selling the secret book of the embellishment technique of my previous life to achieve my goal, and now, I can get the refining secret book of this precious 'Magic Compass' just by talking and laughing." ...... With the first pot of gold, the second pot of gold is much easier, and now that I have a hundred pots of gold, it is really just a small matter to get another pot of gold. ”

After chatting some more gossip, the three of them practiced and rested.

He rested in the cave for three days. This morning, Ouyang Changxun took out his compass with fifteen pillars of light and measured it for a long time, then calculated it in detail, and shouted: "Let's go! The seventy volcano four hundred and fifty miles to the west must have a 'Crystal Flame Stone'!"

Ouyang Lanlan said with a smile: "Big brother, you said the same thing a few times before, but you didn't even find a seventh-level 'Crystal Flame Stone'. ”

“...... Hey, hey, it won't be wrong this time!" Ouyang Changxun smiled awkwardly, and said with confidence: "In the past two days, I have discussed with Senior Brother Liang the measurement method of the 'Technique Compass', and I found that the original method is a little off, and now it should be right!"

Liang Feng smiled: "Then let's go there and take a look, maybe the current algorithm is still wrong." ”

In the past three days, he has been studying and studying the refining method of the Spell Compass every day, of course, the first thing he learned is how to use the Spell Compass, so he now also knows how to calculate the balance of the five elements of the aura within a certain range according to the eight sets of data measured by the compass.

There are two calculation algorithms recorded in the 'Compass of the Spell' secret book, and the second algorithm is a simplified version of the first. However, in Liang Feng's eyes, even the first algorithm is very simple, which is a two-dimensional eighth-order matrix calculation plus point differential calculation, so he only read the cheats once and understood it. But when he was studying, he was not as enthusiastic as Ouyang Changxun, and he still listened patiently to Ouyang Changxun's lengthy explanation, although the method explained by Ouyang Changxun was the second simplified version of the deduction algorithm in the cheats.

According to Ouyang Changxun, the first estimation algorithm in the cheats uses a very deep fixing technique, and few people know it anymore, and the estimation contains calculations under various special circumstances, which is too complicated, so it is difficult to learn one and it is useless to learn the other. He also advised Liang Feng not to waste time and energy to study the first algorithm, and it was enough to learn the second algorithm. At that time, Liang Feng smiled and even claimed "yes!".

"Then let's go!" Ouyang Changxun waved his big hand, and the three of them rose into the sky at the same time, heading towards the No. 70 volcano four hundred miles away

According to Liang Feng's estimation using the first estimation algorithm, within these five hundred miles, the most vigorous fire aura should be the No. 61 volcano in the southwest, followed by the No. 70 volcano that is going to be now. However, because the main purpose of his treasure hunt here is to experience the Dao Heart, he doesn't mind how many 'Crystal Flame Stones' he can find, and he doesn't want to show too many hole cards, so he doesn't say much, just according to Ouyang Chang's goal.

More than 400 miles away, they only took more than two pillars of incense to reach the 70th volcano. Circling around the bare and majestic extinct volcano, they landed in front of a cave that was constantly emitting white mist, and as a rule of thumb, the steaming cavern usually reached the cave in the magma pool at the belly of the mountain.

After arranging the mouth of the cave, they went into the cave.

After running along the zigzag cave for a long time, the original gray cave walls gradually turned dark red, and the end of the cave was red. Liang Feng followed Ouyang Changxun in front of him and stopped.

Ouyang Changxun searched around, and said with a smile: "Senior Brother Liang, Lan Lan, you are waiting here." I'm going to get something this time!" and with that, he sped away into the depths of the cavern, turning into a ball of fire and disappearing into the depths of the cavern.

Ouyang Lanlan watched Ouyang Changxun's back disappear, and after a moment of distraction, she sighed faintly and said, "Senior brother, why do you say that our cultivation path is so difficult? ”

"Where is there a path to advancement that is not difficult?" Liang Feng asked rhetorically.

Ouyang Lanlan's face changed slightly, and she was silent and responded, "I heard...... I heard that there is a very powerful divine skill, and when cultivated, not only does the True Yuan advance rapidly, but it can also integrate other people's Dao heart realms, so the advancement is very fast, and it takes at least fifty years for ordinary people to advance from the ninth grade of the Dao to the first grade of the Golden Pill, and it may only take twenty years to cultivate that exercise. And for example, it usually takes thirty or forty years for a genius monk to advance from the first grade of Jindan to the third grade of Jindan, and I heard that it only takes twenty years to cultivate that exercise. ”

"It can't be such a powerful exercise, right?" Liang Feng was retorting, and his heart moved and said secretly: "It seems that there is such an exercise......