Liu Qingsheng nodded: "Yes." But I still say that it is useless for the heavy artillery unit to cover and bomb the entire underground river. Because the shells only destroy the surface, and the retrograde channel inside cannot be destroyed at all. ”

"Unless, according to the previous plan, a team of elite demon suppressors is dispatched to escort the explosives into the retrograde passage and detonate directly from the inside, so that the retrograde passage can be completely destroyed."

As early as after the Du'an Dissu underground river became the outlet of the retrograde channel, Xu Yan united with rocket forces to try to carry out a devastating blow to the Du'an dissu underground river.

But the result is very disappointing, heavy artillery can destroy everything on the battlefield, but after all, it is a retrograde passage that cannot be helplessly hidden underground.

Only by escorting explosives into the interior of the retrograde passage can the passage be completely ruined.

But that's only a palliative solution, and if it takes a while, the Fallen will open up a new pathway.

It is even possible to open up underground passages to residential areas, or to open up more points in order to avoid being hit by heavy artillery.

The current Duandisu underground river is still more convenient for the demon suppression soldiers to defend, once the new passage exit is changed, I don't know how many people have to die to form an effective defense circle again.

Xu Yan was silent for a while and said, "Admiral Liu, I have a very bad feeling. Please order the heavy artillery troops to be on alert, if there is really an unforeseen accident, we still have one more insurance, right? ”

Liu Qingsheng replied quickly: "No problem, the heavy artillery brigade of the rocket force is originally to cooperate with you in the operation, and I will arrange it." ”

"That's all."

Hanging up the phone, the white-robed academician next to him said in a deep voice: "Is there really something bad going on?" ”

Xu Yan took a deep breath and said, "It's just prepared, I hope I feel wrong." ”

After he finished speaking, he reached out and took out two rune war knives, one long and one short, from the side, carefully hung them on his waist, and then looked at the battlefield stained with blue light.

On the surface of the underground river in Du'andisu, there was already a black gas and a dead air.

It was a phenomenon caused by the death of hundreds of A-class degenerates, and because of these black gases, even the influence of high-voltage currents was weakened a lot.

I don't know when, four black shadows were already standing on the water. They tread on the water as if they were on the earth, and let the water stir under their feet, but their bodies did not move.

Everyone knows that they are four super S-level fallen black angels.

Super S-level powerhouses no longer have to be afraid of high-voltage currents, and even when they are on guard, it is difficult for even snipers to hit them.

Unless it is a sniper of this level made by the former Shanhaiguan guard, it is possible to succeed in a sneak attack.

Xu Yanshu said to the academicians beside him: "I'll leave it to you here, I'll go over!" ”

There are no super-S-level powerhouses on the battlefield of the Fallen, only a few S-level peak town guards are struggling to maintain the situation.

With the blessing of the high-voltage power grid, with the power of the red battle flag, and with a spirit that is not afraid of death, they repelled the attacks of the fallen black angels several times in a row.

In the most powerful one, there were seven fallen black angels attacking together.

Therefore, every time they face the fallen black angels, these S-level peak town guards must take their lives to the top.

As the strongest town guard on the battlefield, Xu Yan must not back down at this time.

The four fallen black angels, well, can barely cope.

Just where did the other three go? Is it hiding in the retrograde channel to recuperate? Or is it ambushed somewhere else?

Thinking in his mind, Xu Yan had already grabbed the long-standing red battle flag from the side of the command post.

Flags fluttered and red lights filled the sky.

Seeing that the red station flag moved, the demon suppressors let out a cheer one after another.

What happened to the Fallen Black Angels? Seven fallen black angels have been blocked at the exit of the retrograde passage for more than a month, such a waste of wood is also considered super S-level?

In the face of the cheers of the demon suppression soldiers, Xu Yan didn't say a word, took one step, and showed off the technique of shrinking the ground into inches, and was already standing next to the town guard envoy in the Sichuan-Chongqing region.

The Sichuan-Chongqing town guard held a knife in his right hand and a red battle flag in his left hand, he grinned and said, "It's just the two of us this time?" ”

Xu Yan nodded: "Min Zhongxing is too seriously injured, let him recover." ”

"Lao Hong needs to be used as a reserve, lest we all go to war and the old nest will be stolen."

The envoy of Sichuan and Chongqing Town smiled: "You really look up to us." Two S-class, against four super S-class, it's crazy! ”

Xu Yan laughed: "First of all, we are not ordinary S-level, but S-level peaks, masters who are likely to embark on the road of conscience within a year." ”

"Secondly, the other party is not really super S-class, they are just a group of soul fragments, they just have simple spiritual intelligence, and they are not even artificial souls!"

"How can such a degenerate survive the path of conscience and become a real super-S-level powerhouse?"

The two town guards laughed, and then the Sichuan-Chongqing town guards said loudly: "That's right! Fuck it! ”

"The demon suppressors of Middle-earth are invincible at the same level! A few shoddy fallen black angels deserve to be compared to us? ”

As he spoke, the four fallen black angels had already taken steps and stood on the shore on the waves.

The water flow on the shore is connected to the high-voltage power grid, so much so that there is a high-voltage current in this place.

But the four fallen black angels did not react, and stood by the river, standing like nails.

The envoy of Sichuan and Chongqing Town shouted: "The two on the left will be handed over to me, and the two on the right will be handed over to you!" ”

Before he could make a move, Xu Yan suddenly grabbed the town guard envoy in the Sichuan-Chongqing region, his expression was solemn, and he said softly: "Slow! Their actions are a bit eccentric! ”

According to common sense, the fallen act only on instinct.

Therefore, most of the previous wars were brainless battles that relied only on brute force.

But the current fallen black angels, after landing on the shore, do not seem to start fighting, but face to face, as if they are greeting something.

At this time, the envoy of Sichuan and Chongqing Town was also stunned, and he couldn't help but say: "What are these guys doing?" ”

The four fallen black angels stood opposite each other and greeted each other. Immediately after, a black shadow flashed in the river, and four depraved black angels in the same costume appeared again.

Xu Yan's face changed greatly, there are four again!

If there are only four fallen black angels, with the right time and place, they may be able to fight each other.

But who would have thought that there would be four fallen black angels behind them.

There are a total of eight super S-level degenerates, even if they are pseudo-super S, they are still not something they can compete with. That's one more than the most dangerous one before!