When the flesh and blood were flying, Lin Feng quickly withdrew the Yuan Sword, and then bullied forward, aimed at Yuan Qian's sea of knowledge that had not yet collapsed, and began to perform the Soul Searching Technique!

Yuan Qian was destroyed, and his bone demonic beast became ownerless, but it was still entangled with Lin Feng's two-winged crocodile viper, and the bloody demon took the opportunity to fly over, wielding the Wuzhu Axe to strangle it into a pile of broken bones.

After the tea time, Lin Feng withdrew his divine sense, took Yuan Qian's storage bag and monk's robe, turned his corpse and the bones of the bone demonic beast into ashes to eliminate traces, and then let the blood demon wear his robe, and then performed the Left Dao Imitation Technique, transforming himself into Yuan Qian's identity!

Next, Lin Feng quickly sorted Yuan Qian's storage bag, took the Winged Crocodile Viper back to the Sumeru Illusion Ring, and then turned into a light and flew towards the sky again, and returned to the Bone Demon City after a while.

With Yuan Qian's identity, the Blood Demon still followed closely behind Lin Feng, passed through the bustling crowd of the Bone Demon City, and went straight back to the Bone Demon Sect, with Yuan Qian's identity and status, Lin Feng easily entered and exited the major forbidden places of the Bone Demon City.

Through Yuan Qian's soul search, the location of that secret passage also had an idea in Lin Feng's heart, and through soul searching, Lin Feng confirmed a guess, that is, Huyan Ancestor had been staying at home for several months in that hall!

Huyan Ancestor put all his energy on refining the tenth-order bone demonic beast, judging from this point, the time for the Bone Demon Sect to leave the Bone Demon Realm must be imminent, and a large number of disciples are frantically collecting huge amounts of materials, preparing to make Zuihou preparations for the evacuation of the Bone Demon Domain.

And because of this, all the internal affairs of the Bone Demon Sect have also been dispersed, and even the death of the disciples under the sect is no longer concerned by the Huyan Ancestor, and the most coincidental thing is that the person in charge of the "Oath Palace" of the Bone Demon Sect is Yuan Qian!

In the oath hall, there are all the natal spirit cards of the inner disciples, and in each natal spirit card, there is a blood oath made by the corresponding disciple when he first entered, and once the disciple falls outside, the blood oath will be invalid, and the natal spirit card will be broken immediately.

Any Xiuzhen Shili, whether it is a large sect or a small Xiuzhen family, has its own oath hall, and the monk in charge of the oath hall must be the highest cultivator in the sect or family, or his cronies, so as to prevent other disciples from entering the main hall, stealing the natal spirit card to destroy the blood oath, and taking the opportunity to betray the family and sect.

Huyan Old Ancestor has been bent on the refining of the tenth-order bone demonic beast, and has not asked about the internal affairs of the Bone Demon Sect for several months, and Yuan Qian, who is in charge of the Oath Palace, has been staying by Huyanji's side and being driven by him, and the situation in the Oath Hall has long been ignored!

Therefore, Yuan Qian even included the four Kuang Yue before, their fallen Huyan Ancestor could not know, and he would not have expected that Lin Feng could actually attack and kill the four murderers of the Bone Demon and Yuan Qian of the ninth layer of the Golden Pill with the power of one person, at this time, he was still racing against time in that hall, refining a large number of fetal bone materials with the Golden Demon Pot, and making every effort to build a tenth-order Bone Demon Beast!

At this time, Lin Feng relied on Yuan Qian's special identity to frequently enter and exit the major forbidden places of the Bone Demon Sect, and the other disciples of Huyan Old Ancestor saw that Lin Feng was still led by Yuan Qian, constantly walking around the Bone Demon Sect, and this news reached Hu Yanji's ears, so naturally it would not arouse suspicion.

On the sixth day, Lin Feng and the Blood Demon explored dozens of forbidden places in the Bone Demon Sect, but they never found the secret passage, and the rest of the places were all involved in Yuan Qian's memory, but there was no information about the secret passage at all, and the only place that Lin Feng had never explored, that was the hall that Hu Yanji had been unable to stay in for a long time!

In Yuan Qian's memory, there has always been a hovering shadow in this hall, Lin Feng's soul searching technique entered it several times, and the images he saw were either pitch black or seriously distorted, and he couldn't get a clue at all, and it was for this reason that he paid a lot of attention to this hall, and because of this, he preliminarily guessed that the secret passage to the Yulong Realm was very likely to be in it!

However, Hu Yanwei personally sat in the main hall, and Lin Feng had no chance to go in to investigate, but in Yuan Qian's memory, Lin Feng noticed a secret mine newly opened up by the Bone Demon Sect in the Ethereal Valley, and at this moment, he entered this mine in the Ethereal Valley under the leadership of the blood demon!

Yuan Qian's identity is well known, and in the Bone Demon Sect, he is almost omnipresent, as Hu Yanji's personal disciple, this is his privilege over other disciples, the guards guarding the mine road, after seeing him, they are all respectful, and send him into the cave with a flattering face.

The mineral produced by this mine is not a common spiritual ore material, nor is it a spirit stone of real gold and silver, but a thunder nitrate sand that is extremely difficult to mine and collect!

The stock of thunder nitrate sand in the cultivation realm is very small, and the veins containing thunder nitrate sand are even rarer, but the ethereal valley in the Thunder Nitrate Realm has been a paradise since ancient times, and there are a large number of places where no monk has ever entered, and the vein discovered by the Bone Demon Sect is precisely because it contains thunder nitrate sand and has been highly valued by Hu Yanji, so he arranged for the inner disciples of the Bone Demon Sect to secretly excavate these spiritual mines.

However, the mining of thunder nitrate sand is very difficult, because its content is uneven, and it is very easy to detonate under the action of mana, so it is necessary to be 10,000 times more careful when collecting, in fact, the monks in the mine are not worried about being injured by the thunder nitrate sand, because the content of thunder nitrate sand is generally very small, and it is not purified, and it is not enough to threaten the life of the monk.

The reason why these monks are trembling is that they are worried that once they are detonated by mana, these rare thunder nitrate sand will also be wiped out, although the Bone Demon Sect is not familiar with the method of refining shrapnel bullets, but as long as a sufficient amount of thunder nitrate sand is collected, the threat and deterrent power it has is enough to annihilate a sect in an instant!

The value of the Thunder Nitrate Sand is no less than the best material of any Yuan Infant Stage, and it is the only sky-high material for the Left Daomen, and only the Left Dao Sect's Zuo Dao trickery can bring the power of the Thunder Nitrate Sand to the highest level, once the Thunder Nitrate Sand is refined into a thunderbolt, it will make any monk frightened!

Lin Feng searched for the information of the thunder nitrate sand from Yuan Qian's memory, and he was already excited at that time, but now Hu Yanwei continued to live in the main hall without coming out, and Lin Feng couldn't go in, so a flash of inspiration flashed in his mind, so he put his mind on the thunder nitrate sand .

The number of monks in the mine path was extremely small, but all of them were inner disciples of the Bone Demon Sect, Lin Feng and Blood Demon entered the bottom of the mine and saw dozens of monks gathered in a newly opened fork in the road, talking about a boulder more than ten zhang high.