The reason why the Thunderbat Cave has always existed underground and has not collapsed is because of a special "rock wall" inside, and so far scholars have not studied what material this rock wall should belong to, and even if there is a real master, forcibly digging a piece and peeling off the fragments after the whole, it will lose its special effect.

However, when it is the rock wall as a whole, it is not only as hard as the defense of the shelled holy beast, but also has the ability to repair itself......

Of course, this kind of repair ability is also the limit, just the kind of white marks scratched out by Jiang Ruonan's previous experiments, which are naturally repaired instantly, but if the crack is too large, it will stop repairing because it exceeds the repair limit.

However, the part that does not have a special rock wall and is in direct contact with the underground soil and rock can be excavated......

If there are two passages, both of which come into contact with the earth and rock, it is naturally possible to connect the earth and rock.

It's just that neither the professional nor the abyssal bat will do this on purpose, and the professional has no reason to help the abyssal bat expand its living space, and the bat ...... There is no instinct to dig holes!

If there are burrowing-type abyssal creatures, they may do so, but due to exclusivity, there are no abyssal species other than abyssal bats in the cave.

Therefore, there are only a few unexpected landslides that will allow the two corridors to be connected......

And Guan Liyuan and others encountered this situation unexpectedly - the second group of bats that were originally led away, although in terms of absolute distance, is not far from the open area, but it takes at least two hours to come along the channel.

However, there was a collapse in the middle of the way, so that the two channels that were staggered up and down were connected, so that the bats came back early, and at this time, they also caught up with the "green-haired honest bats" crazy......

Guan Liyuan and the other five immediately decided to retreat! If they don't retreat, I'm afraid they'll have to put themselves here......

At the same time, in addition to Zhong Liqiu, who has a big heart, the other four people also have some subtle doubts in their hearts - first the personality is not at all like a boss who will "go crazy", but he actually went crazy unexpectedly, and then he collapsed a few times a year, and he was also touched by them, and it happened to be encountered in the most unfavorable way for them!

If it was all a coincidence, then Guan Liyuan felt that after going back, it was necessary to go to Old Man Tan once - he still had an exorcism service there.

If not by coincidence, then ...... Now they don't have time to think too much, it's important to run for their lives first!

"Go to the entrance of P9 Road and go in the direction of Q3 Road. Guan Liyuan said.

"Well, it's too 'spacious' over there, isn't it?" or N7 ......," Gu Yuanxi questioned.

"Listen to me! I have an idea!" Guan Liyuan didn't have time to explain in detail.

Gu Yuanxi didn't hesitate too much when he heard this, and chose to trust Guan Liyuan's "idea".

The situation suddenly became worse, the professional squad that was originally the main attack became a beaten water dog, and Zhong Liqiu's "Tiger Howling Cloud" also changed from dividing the battlefield to "covering and retreating".

In order to save the "power of the profession", Guan Liyuan has already lifted the "Nine-Tailed Holy Clothes" and fought separately from Dingchun, and at the same time summoned three rumbling rocks, and after rolling around, he used the "Big Bang" - clearing the retreat path for everyone to gain time to retreat.

Before, Guan Liyuan and the others tried to avoid fighting with the bats in the narrow passage, and specially led the boss to a wide place to fight, but now a few people are eager to come out of the ground and let them drill - because the purpose was to destroy the boss before, but now it is to delay the retreat as much as possible!

The road suggested by Gu Yuanxi is one that is extremely narrow and there is no need to worry about being copied.

Although Guan Liyuan's choice of this avenue is not a thoroughfare, it is also wider than that......

After retreating from the open area to the entrance of Road P9, Guan Liyuan summoned the Great Steel Snake and the Tutai Turtle again to delay time here, and there was no need to block the entrance on the other side.

After entering the Q3 road, Guan Liyuan waved his hand and summoned three Mountain Piercing Kings, including the one he originally cultivated, which has now reached the lord level, and the other two are all at the commander level.

At this time, there were already abyssal bats breaking through and chasing after him, and Guan Liyuan simply lifted the summoning of the Tutai Turtle and the Great Steel Snake - the professional power of the "Otherworldly Summoner" was very valuable at this time!

The three mountain kings did not join the battle, but after they appeared, they "rolled" backwards one step earlier than Guan Liyuan and the others......

On the contrary, Guan Liyuan's five people, as well as Chongming and Dingchun, teamed up to retreat behind the three mountain kings, delaying the pursuing bats.

Therefore, on the contrary, the three king of the mountain who retreated with all their strength soon disappeared.

At this time, Guan Liyuan's five people could only attack the abyss bat in front of them, and they could no longer see the figure of the mad green-haired honest bat, but at this time, they were not aiming to defeat the other party......

"This electrotherapy has become more difficult!" Gu Yuanxi also began to learn Guan Liyuan's words.

"It's true that the healing ability has not been weakened, and it also has a madness effect......" He Xigui also seemed to have a headache when he heard his tone.

Half an hour later, Guan Liyuan summoned the other three tailed beasts as well - it was pointless to lure another group of bats farther away at this time.

"This way!" Guan Liyuan said at a fork in the road.

"What? This is a dead end, are you mistaken?" Gu Yuanxi exclaimed.

"Don't worry......," Guan Liyuan said.

And Zhong Liqiu and Jiang Ruonan had vaguely guessed what Guan Liyuan's plan was!

The five of them followed Guan Liyuan's lead and retreated into an unnumbered cul-de-sac......

"Well, this is ......" Gu Yuanxi and He Xigui's eyes lit up at this time.

I saw that in what should be a dead end, it was not a dead end, but a small-scale cave......

That's right, although this is a dead end, it is not a special rock wall that blocks the road, but ordinary earth and rock, and the special rock wall is directly truncated here.

Therefore, the previous three mountain kings can use "digging holes" here, and the reason why Guan Liyuan bought time for them before was to let them "tailor" a "trench" that is easy to defend and difficult to attack!

Although Gu Yuanxi and He Xigui saw this ability for the first time in the King of the Mountain, they also understood Guan Liyuan's intentions, and immediately cooperated and retreated into the "trenches......

Five tailed beasts are in charge of the queen - they don't really die anyway.

Guan Liyuan no longer has the power of the "Otherworldly Summoner" profession to summon other rumbling rocks again, and the power of the remaining professions will be used to maintain the three Mountain Kings!

After the rhino dog and the brigade were broken and incarnated, the group successfully retreated into the "trenches......

The whole "trench" seems to be digging out a gourd shape, after everyone retreats into the gourd mouth, they find that the inside is very spacious, which is conducive to the people inside, and at the same time the entrance is narrow, as long as the entrance is blocked, the bats attacking outside cannot play a numerical advantage.

Although the other party's abyssal demon bats, one by one, also entered a quasi-crazy state under the stimulation of electrotherapy, they couldn't attack for a while.

At the same time, on the other side of the "gourd", there is a narrow "exit", and behind the road along with the exit, three kings are digging the second half of the "gourd" "on an empty stomach", and they don't know what they are going to do......