Different from the previous fierce cave, the nest of the Yin Netherworld Bat is located in a small spirit stone mine, which has a large number of low-level demon beasts, a large space, and abundant spiritual energy.

In addition, such forcible destruction will also cause great damage to this small spirit stone mine, and in the end, the gains may outweigh the losses.

Set up a formation at the exit just in case, and then the two walked down the largest passage together.

The demon beast of the Yin Netherworld, mainly wood, the means of attack is nothing more than the wind blade, sound waves, etc., itself also comes with a certain toxicity, there are a large number of Yin Netherworld bats in the mine to survive, after a long time, a poisonous area has been formed here, the air in the passage contains a large number of toxins, mortals will definitely die if they touch it.

Li Muchen and Song Yongxing, as cultivators in the foundation building period, have a high resistance to this low-level toxin, and they are only slightly dizzy, and if they take a poison repellent pill, they don't have to worry about poisoning, but the smell here can't be eliminated.

Of course, forbearance is over, and the two of them are not so precious, and they can still adapt to this environment.

Outside the crack, there are not a few spirit stones, the demon beast has no concept of sustainable development, the use of the spirit stone mine is very rough, the spirit stone outside is gone, so it drills inside, and when this spirit stone mine is completely destroyed, it will find other spirit places to build nests.

After entering the crack for more than ten meters, there are more ordinary Yin Netherworld bats, this kind of weak creatures that are not yet called first-order demon beasts, the strong among mortals can also be killed, but there are quite a lot, in order to avoid attracting the attention of the demon bat king in the depths, the two quickly killed the approaching Yin Netherworld bats.

Bat demon beasts, with special senses, acting in front of them, it is difficult to hide their figures, Li Muchen and the others did not plan to raid, so many Yin Netherworld bats, it is impossible to avoid them all, just interrupt their communication as much as possible, and reduce the reaction time of the Yin Netherworld Bat King in the depths of the nest.

Quickly passing through the outer layer, the non-advanced Yin Netherworld bats along the way were wiped out by the two without reacting, and after going deep into the crack for nearly 100 meters, the surrounding environment was obviously different, this was probably the dividing line in the Netherworld Bat population, and deeper, it was the gathering area of the advanced demon beasts.

When they got here, there were many forks in the road around, but the goal of the two of them was very clear, the Demon Bat King must live in the place with the most abundant aura in the ore vein, so there was no need to worry too much, just follow the induction to the depths of the ore vein.

"Senior brother, you and I will take turns to open the way, and kill these advanced demon bats as much as possible, so as not to cause trouble later!"

Song Yongxing said, the previous non-level demon bats can be ignored, but here, you can't ignore these low-level demon bats, otherwise in this closed environment, being besieged by a large number of low-level demon bats is not a small risk.

Li Muchen nodded, took out a defensive spirit weapon, followed behind Song Yongxing, and covered for him, while Song Yongxing controlled a spirit sword to quickly kill the low-level demon bats that pounced around him.

With the cooperation of the two, they quickly passed through this area and entered another passage.

At this time, a large number of low-level Yin Netherworld bats died, and the movement of the battle could not be concealed, I don't know how the demon bats were connected with each other, and after advancing more than ten meters, a large number of demon bats rushed over from various passages.

Most of the Yin Netherworld bats that attacked were more than a foot long, and their wings were spread out and nearly three feet wide, and the seemingly weak bat wings were drawn with a wind blade between opening and closing, which was their natural spell.

Under the command of the mid-level Yin Netherworld bats hidden in the dark, a large number of Yin Netherworld bats attacked from the top, and Li Muchen and the two had to stop and fight here.

Song Yongxing didn't seem to have a powerful formation weapon, Li Muchen didn't think about it, and took out a Xunfeng Banner from the storage bag, which was a formation weapon, so that the three-grade formation Xunfeng Array could be arranged.

In terms of the strongest formation on the body, it is naturally the four-rank formation covering the earth and the mountain formation, but this set of formations is slower and difficult to move, which is not suitable for the current situation.

With Song Yongxing's cooperation to temporarily block the demon bat group, Li Muchen arranged the formation in two by three, put a medium-grade wind attribute spirit stone, plus more than 20 low-grade wind spirit stones, and a cyan formation unfolded, Song Yongxing saw this and retreated into it, and the two of them used the power of the formation to block the attack of the demon bat group.

In addition to the demon bats with the talent spell of the wind blade, there are also some demon bats with special physiques, who rush fearlessly, but they are not steel and iron bones, and hitting the wind wall on the outer layer of the Xunfeng Array is tantamount to hitting a stone with an egg!

It is necessary to know the power of Xunfeng, but it is the sharpest attribute, the wind wall on the periphery of the Xunfeng Array is actually a fast-rotating Xunfeng, like a meat grinder, which will grind the rushing demon bats into a piece of minced meat in an instant, and soon the periphery will become a blood red, and even the wind wall seems to be dyed with a layer of blood.

Seeing this, the mid-level demon bats controlled behind him withdrew those melee demon bats and controlled those demon bats with long-range attack capabilities to attack.

Li Muchen didn't let them besiege him, he pinched the law, the Xunfeng flag fluttered in the wind, and the surrounding wind wall suddenly unfolded, turning into a violent wind that swept in all directions, blowing away the demon bats around him.

At the same time, Song Yongxing also cooperated with the attack, using a set of flying needle magic weapons, a little red light flew out along the wind, with his cultivation in the middle stage of foundation building, against the dense group of demon bats is a quasi, under the covering attack, a large number of demon bat corpses crackled and fell, outside the area shrouded by the formation, there were already corpses of demon bats.

With such a big loss, the Demon Bat King in the depths no longer watched from the sidelines, let out a low hiss, and came out of shape, accompanied by the appearance of the Demon Bat King at the peak of the fifth order, and other middle-level demon bats also flew out.

A fifth-order peak demon bat king, a fifth-order early demon bat, plus three fourth-order demon bats, this is the high-end combat power of the demon bat group.

However, in Li Muchen's induction, the threat to him from the fifth-order peak demon bat king is not as good as the previous iron-crowned dragon eagle, the bloodline difference between the two is too great, in terms of racial talent, the population of the iron-crowned dragon eagle belongs to high-level demon beasts, and the yin bat is just an ordinary demon beast.

The middle-level demon beast made a move, and the offensive suddenly changed, Li Muchen didn't dare to be careless, and the Xunfeng array retracted, protecting the space within a zhang around him, and at the same time deploying a defensive spirit weapon.

"Senior brother, you are in charge of defense, and I will take care of the rest!"

Seeing the appearance of the Demon Bat King, Song Yongxing snorted coldly, took out a rune treasure, injected mana and set it aside, and at the same time controlled a superb spirit weapon flying sword to attack.

Five middle-level demon beasts participated in the battle, the defensive pressure increased greatly, and the wind system spirit stones in the formation were consumed faster, Li Muchen hurriedly replaced the new spirit stones, infused mana to control the formation, and did not forget to be distracted to observe Song Yongxing's attack methods.

When two people team up, the pressure is reduced a lot, otherwise it is not so easy to take care of defense and attack at the same time under the siege of a group of demon beasts.

Now with Li Muchen's help, Song Yongxing was able to shoot with all his strength and spit out the depression of being seriously injured by the demon beast before!

The set of flying needle magic weapons outside is just a top-level magic weapon, and the consumption is not too big, Song Yongxing controls the flying needle to kill the low-level demon bat, and at the same time controls the best attack spirit weapon Floating Leaf Sword to entangle the demon bat king.

From Li Muchen's point of view, Song Yongxing's mana control was quite exquisite, and thirty-six flying needles chased and killed low-level demon bats from different directions, until they forced a fourth-order demon bat to chase after the flying needles.

The best magic weapon, in the hands of the cultivator in the foundation building period, the control is naturally more convenient, it is really good as an auxiliary weapon, controlling multiple spiritual weapons, the requirements for the cultivator in the foundation building period are greater, one main attack spirit weapon, with a superb magic weapon, it is more convenient to control.

On the other battlefield, the Floating Leaf Sword conjured up countless phantoms to meet the strongest Demon Bat King in the Demon Bat Group.