Lin Feng and the others made a passage on the mountainside, leading all the way to the mountainside. And before they could reach the halfway point, everyone didn't feel the heat of any strange fire, but they heard bursts of thunder.

Everyone frowned and looked at Lin Feng, now in this situation, it is almost certain that there are heavenly and earthly treasures. But could it be the strange fire that Lin Feng said before? A few people couldn't help but be a little skeptical.

However, when they saw Lin Feng's face, they began to struggle again. Lin Feng's face was not the embarrassment of being punctured by bragging, but a surprise that felt very excited.

The Extreme Dao Immortal Pot should have some deep connection with the different fires. Whether it is storing multiple different fires at the same time, or the bonus effect on the power of different fires, they all prove this to Lin Feng.

Because it hadn't been very long since Lin Wanshan had woken up, he hadn't had time to explain all of this and Lin Feng of the Extreme Dao Immortal Pot. But since Lin Wanshan said that he felt a strange fire, it must be right.

And since it has been confirmed that the Heaven and Earth Treasure inside the mountainside is a kind of alien fire, and if it is related to the thunder attribute, there may not be much left.

And among them is the worst, and it is also the Zixiao Burning Thunder Flame that ranks seventh in the Xuan Rank Alien Fire. The second worst is the Purple Mansion Thunder that Old Man Long once subdued. Then, there will be no Xuan-level thunder attribute fire.

Lin Feng currently possessed two kinds of Xuan-level Alien Fires, and the strength of the Ghost Ember Burning Fire was undoubted. It's the Netherworld Ghost Fire, and it's also quite helpful to Lin Feng. If it weren't for the fact that there was no trace of achievement in alchemy and refining. Even in terms of combat, the support effect is higher than the actual attack effect. Otherwise, the Netherworld Ghost Fire would not be able to rank so low in the Xuan-Rank Alien Fire.

If a monk subdues the Nether Ghost Fire as his natal true fire, unlike Lin Feng's situation, this weapon cultivator still has to wrap the enemy with the Nether Ghost Fire. Using the Nether Ghost Fire in the air like Lin Feng could only exert the effect of the Nether Ghost Fire's soul erosion. But in fact, the Nether Ghost Fire still has a certain mana erosion effect.

But on the whole, the improvement of the strength of a single Nether Ghost Fire on the strength of the monk is indeed inferior to those different fires that are ranked in the top ten of the Xuan Rank. Only when I arrived at Lin Feng, the situation was special. Most fires require contact with the enemy's mana to be effective. Therefore, for Lin Feng, with the Ghost Light Ember Burning Fire, even if he subdued the Seven Aperture Glass of the Second Xuan Rank, there would be no actual improvement for Lin Feng.

On the contrary, this Netherworld Ghost Fire can just match with Lin Feng's ghostly light ember fire.

In the past few hard battles, if the enemy was really strong enough, Lin Feng would generally mobilize the Nether Ghost Fire to carry out auxiliary attacks. And I have to say that the Netherworld Ghost Fire did have a strong effect in Lin Feng that did not match its ranking.

And the Netherworld Ghost Fire of the Nineteenth Xuan Rank is so strong, even if it is really only the weakest thunder attribute Alien Fire Zixiao Burning Thunder Flame in the belly of the mountain, its effect is definitely very strong.

Lin Feng also knew that even if he subdued the Zixiao Burning Thunder Flame or even the Purple Mansion Thunder, it would not have any actual effect on him. However, it is the treasure of heaven and earth that can best reflect the identity of an instrument cultivator, and it is the ultimate pursuit of instrument cultivation. Even if you don't use it, even if you don't use it to sell spirit stones, it's okay to collect it and take it out, and you feel like you're having a lot of face.

Besides, now it is only confirmed that the abnormal fire in it is related to the thunder attribute. What if it really wasn't a Xuan-level thunder-attribute fire? If it really encountered a powerful earth-level fire, even Lin Feng might not be able to subdue it now. When he reached the Earth Yuan Realm, as soon as he subdued the Earth Rank Alien Fire, his strength immediately improved by leaps and bounds.

Ji Sihan and the others looked at Lin Feng whose eyes were shining, and shook their heads helplessly, not blocking Lin Feng any more. They also understood Lin Feng's excitement. Just like the alien fire is to weapon cultivation, a demon beast with a high level of talent but still in the growth period has a similar meaning to beast cultivation. Several of them still remember what kind of state they were in when they subdued the Howling Wind Tiger.

The crowd went some distance deeper, and almost at the same time, several of them frowned.

"Roar...... A low beast roar came from the direction of the mountain. Lin Feng and the others hadn't felt the fluctuations in the spiritual power belonging to this demon beast before, and it was obvious that this demon beast had taken the initiative to hide it. However, Lin Feng and the others were busy opening the mountain, but they did not hide the movement, nor did they hide the fluctuations of spiritual power on their own bodies. The demon beast should have sensed the existence of Lin Feng and the others very early, but it was far away before, so it didn't make any rash moves. Now that it has been confirmed that the direction of Lin Feng and the others is to the belly of the mountain, and it is getting closer and closer, the demon beast has issued a voice to warn.

And after warning Lin Feng and the others with his voice, the demon beast immediately exuded his original strong spiritual power fluctuations.

Overall, it is still the spiritual power fluctuation of the late Mahayana level, but it is already much stronger than that of ordinary monks in the late Mahayana period, and judging from the level of spiritual power that is manifested by the spiritual power fluctuations, it has at least reached the level of about twice that of ordinary late Mahayana monks.

Lin Feng frowned, because this spiritual power fluctuation was already very problematic. Like a human monk in the late Mahayana period, no matter how strong his actual combat power is, the spiritual power fluctuations he exudes are at the level of the normal late Mahayana stage. What magic weapon grade, natal true fire or not, whether it is a different fire or not, has little impact on the fluctuation of the spiritual power of the monk's origin.

And as soon as he broke through the Earth Yuan Realm, the spiritual power fluctuations would immediately rise to the level of the Earth Yuan Realm.

However, the spiritual power fluctuations in the belly of the mountain are still quite different from the level of the Earth Yuan Realm, but they are already much stronger than the spiritual power fluctuations that ordinary demon beasts in the late Mahayana stage should emit. Lin Feng was a little confused for a while.

Lin Feng looked in the direction of Ji Sihan, Simiao, and Zhuo Wanjiao. In the end, these three people are the most upright beast cultivators, and the Qionglong Valley is a little downtrodden now, but the sect is definitely the top layer of the Beast Emperor Domain. Regarding the question of demon beasts, if there is something you don't understand, it's always right to ask these people directly. If they don't know, they won't necessarily get any good results by asking others.

The three of them were all frowning like Lin Feng, but their eyes were not Lin Feng's kind of doubts, some were just extremely obvious solemnity.

"King beast?" Si Miao's voice hesitated. Lin Feng was stunned when he heard this, he seemed to have heard such a title before.

"At least it's a king beast. Ji Sihan is sure. It wasn't until he noticed that Lin Feng and Eldest Sun Yuzheng were looking at them with puzzled expressions that Ji Sihan explained to the two.

There are many criteria for evaluating the strength of a demon beast. If it is said to be the third grade of the ground level or the upper grade of the Xuan rank, this is referring to the talent level of the demon beast, and if it is for the mature demon beast, it can also be used to indicate the actual combat effectiveness of the demon beast.

Generally speaking, in the case of the same realm, the demon beasts with a high talent level are generally stronger than the demon beasts with a low talent level.

And now, the problem arises here in this "in general".

Just like those heavenly treasures that Xiao Hei enjoyed in the Firmament Dragon Valley. The strongest effect is, of course, the kind like Jing Lan Shuxin that can activate the bloodline of the demon beast and thus improve the talent level of the demon beast. Such an effect, of course, is something that can be encountered but not sought. The Firmament Dragon Valley has collected so many heavenly and earthly treasures for Xiao Hei over the years, and none of them have succeeded in allowing Xiao Hei to activate his bloodline again.

The effect is inferior to this kind of heavenly and earthly treasures, which are those heavenly materials and earthly treasures that can increase the total amount of demon beasts' demonic power, and the final result is to improve the actual realm of demon beasts. The realm of demon beasts has improved, and of course the strength has also risen. Xiao Hei enjoyed this kind of heaven and earth treasure in the Firmament Dragon Valley, and Lin Feng's breakthrough speed was already outrageously fast, but Xiao Hei's realm has been closely following Lin Feng's pace, relying on the Firmament Dragon Valley's offerings.

And there is another kind of natural treasure that directly improves the physical fitness of a certain aspect of the demon beast, or a certain aspect.

The realm has not been improved, but the strength, physical strength, flexibility, mana resistance, and so on have been greatly improved. It is not impossible for a high-grade demon beast that has reached the Mahayana stage to compete with a talent level that has reached the first grade of the earth level, but the realm is also a demon beast of the Mahayana period.

Therefore, it is the same Xuan-level high-grade demon beast, an ordinary demon beast, and it is almost as strong as a normal human monk in the same realm. Elite demon beasts, but they are already invincible to the vast majority of human demon beasts. If it is a king beast, it often already has the ability to defeat ordinary human cultivators by leapfrogging.

Judging from the fluctuations in the spiritual power of the demon beasts in the mountain's belly, the demon beast in the mountain's belly is very likely to be a king beast in the late Mahayana period. Of course, the barrier between the human element realm and the earth element realm cannot be crossed. If this demon beast is a king beast, it should not have much problem defeating a human monk in the late Mahayana period when it is in the middle of the Mahayana period. However, in the late Mahayana period, it was completely impossible for it to be an opponent of the masters of the Earth Yuan Realm.

Of course, the king beasts in the late Mahayana period, in the combat power of the Human Yuan Realm, are not much worse if they are not invincible. Don't look at the spiritual power fluctuation, the degree of spiritual power represented by the fluctuation of spiritual power is twice the level of a normal late Mahayana demon beast. However, in terms of actual combat effectiveness, I am afraid that the two late Mahayana demon beasts joining forces may not be the opponents of the late Mahayana king beasts.

After knowing the strength that the opponent they were about to face might have, Lin Feng and the others had a certain amount of worry in their hearts. But there's certainly no backing down. If you don't fight a battle, how can you know that your group is not the opponent of the king beast inside?

Not to mention anything else, Lin Feng himself is a super master in the late Mahayana period, plus several other people and the demon beasts that everyone subdues, even if he is against the king beasts in the late Mahayana period, he has no power to fight.

Even if you can't beat it, it should be no problem to run away when the time comes. The king beast stayed here mainly for the wisp of fire in the belly of the mountain. There was no need to give other people or other demon beasts an opportunity to pursue Lin Feng and his party.