For a long time, the Brain in the Vat technology in the universe has been of great help to the Earth Federation, until the Earth Federation began to contact other alien civilizations and learn new technologies from those alien civilizations, and the Brain in the Vat technology was finally abolished.

The reason why Leo mentions the midbrain technology to Sylvia is because Leo has seen some instruments related to midbrain surgery at the mecha repair site in the Abyss Defense Zone. And he understands this technology that has been sealed into a museum by the Earth Federation, and it is also because he has almost accepted the transformation of the brain in the jar technology.

Although the plan was eventually aborted due to the accidental death of the person who mentioned it, it left a deep impression on Leo's heart, so much so that he later looked for relevant materials and looked them up carefully, and even passed several mid-cylinder brain surgeries through a simulated learning device.

"The approach works. Leo carefully recalled what he remembered about the brain in the vat, and then added: "Even if this technique is successful, it will have a lot of side effects, the most obvious being that the people who undergo the surgery will become more and more inhuman." ”

"This is a matter for the future, and what we will do in the end has nothing to do with it. Sylvia shrugged her shoulders, turned her head to look at the side of the conference room, and said, "You should have heard our conversation, there is now a way to deal with the abyssal power in the body of Grand Commander Tyrell and prevent the abyssalization, but it will cause Grand Commander Tyrell's body to be completely paralyzed. However, we also have a technology called the brain in a vat that can change the head of Grand Commander Tyrell into a container and then change his body again, do you think it's possible, do you want us to help?"

Hearing Sylvia's words, one of the sergeants asked in a deep voice, "Will this mid-brain technique have any effect on Sergeant Tyrrell's combat effectiveness?"

Sylvia turned her head to look at Leo, who stepped forward and replied, "There will be an impact, but it may be a good influence or a bad one, because it depends on whether the parts that have been preserved in Lanxi City are complete and whether the model is suitable." Without enough parts and devices, Tyrell's combat power will not only not be weakened, but will become stronger, and even the combat effectiveness of the entire mecha army will become stronger. ”

Hearing Leo's words, there were immediately all kinds of discussions in the conference room, and after a while, another bachelor asked, "Can we learn the technique of the brain in the vat?"

Leo replied calmly: "I need an assistant, you can send someone to help, whether you can learn it or not is up to you." ”

Leo's words caused a discussion in the conference room, and then the speaker of the conference room tapped the table a few times, signaled everyone to stop talking, and then said to Leo: "We need to discuss it before we can make a decision on this matter, and when we have the result, we will ask Pope Alice to inform Your Excellency." We won't let you do things in vain, and as long as you can save Sergeant Tyrrell, we'll pay you well. ”

Leo didn't appear too happy, just nodded in agreement.

After that, the image connection between the two sides was severed, and the image of the entrance to the abyss reappeared on the observatory's screen.

It's just that Leo didn't have the heart to observe the situation at the entrance of the abyss at this moment, but turned his head to look at Sylvia and asked, "Why did you suddenly want to use the Transformation Ritual on that Tyrell?"

"For the Lifestealer in his body, of course. Sylvia explained, "We took the Lifestealer out through the Ritual of Transmutation, and then used your fire of karma to refine the Lifestealer's original bloodline, and when the time comes, I will absorb it and replenish the little one in the belly, and we won't need to stay here any longer." ”

"Can the fire of sinful karma refine the bloodline of the higher races of the Abyss?" Leo said as he looked at Sylvia in surprise when he heard this.

"Don't you know?" Sylvia also looked at Leo with some surprise, and then smiled: "It seems that the abyss knowledge inheritance you have obtained is not complete, and you don't even know such an important thing, no wonder I have never seen you seriously develop the power of the fire of sinful karma." ”

Sylvia then gave Leo everything she knew about the fire of sin.

As Sylvia said, Leo's understanding of the fire of sin karma is indeed very shallow, just knowing that the fire of sin can burn the power of the abyss, but in fact, the fire of sin karma can also refine the bloodline of the higher races of the abyss, can create a temporary abyss, etc., even Sylvia, who has inherited the memory of the abyss demon dragon inheritance that is close to complete, cannot fully say all the effects and methods of the fire of sinful karma, after all, the fire of sin karma has a strong restraint effect on any living creature in the abyss.

After listening to Sylvia's story, Leo quickly mastered this method, not that the method is simple, but this method is very similar to the method created by Leo himself to clear the power of the abyss, both are directly burned with the fire of sinful karma, the only difference is the strength of the incineration.

"The method is not very difficult, and you can master it completely with a few times of practice. Leo explained his situation, then asked, "What about the conversion ceremony?"

"This one is simpler, now ......" Sylvia was about to explain her thoughts, but before she could finish her words, she stopped, her eyes stared directly at the image of the entrance to the abyss in front of her, and exclaimed, "Look!"

In fact, it didn't take Sylvia to warn her, Leo could already see that something was wrong with her look, and turned her head to look at the image of the entrance to the abyss projected by the monitor.

I saw that the abyss tide that everyone in Lanxi City thought had calmed down erupted again, and this eruption was almost without any prior warning, the black oil and gas mist at the entrance of the abyss erupted like a volcanic eruption, which was several times stronger than the previous abyss tide, and just the shock wave caused by the eruption of the black gas mist hitting the dome had already made the entire Lanxi City shake.

Moreover, the black oil mist also spread at an extraordinary speed, so that all the protective measures in the defense area had already spread to the entire defense area before they could be activated.

Fortunately, the wall made of the Divine Word that was used for blockade on the periphery of the previous defense zone did not need to be activated, and could be used at any time, blocking it back when the black gas mist full of abyssal power spread over, preventing the abyssal erosion from spreading to other areas.

It's just that in the blink of an eye, the Abyss Defense Zone has completely fallen.

While this is not the first time that the Abyssal Defenses have fallen, there have been many times in the history of defenses in which Abyssal forces have taken over the area.

But those few falls are completely different from the current falls, those few falls are just the abyssal power spreading around, and the black oil mist composed of those abyssal forces has not yet occupied the entire area, and more importantly, in those few falls, the defense force of Lanxi City still has a strong commander and leader, organizing various resistances, and finally recapturing the defense area.

But now that the gods are the nominal leader of each church, Priest Luther is dead, and the commander of the Dreadnought Mecha Legion is also paralyzed by the abyssal, although in the fallen defense area, the combat effectiveness is still intact, but it is in a state of leaderlessness, it is no exaggeration to say that if there is no correct way to deal with it now, the fall of the abyss defense area will make it completely falling.

The abyssal tide suddenly erupted, instantly enveloping the entire abyss defense area, and at the first time it was transmitted to the management meeting that was still discussing whether Tyrell should be treated, and everyone present saw the image on the monitor that had been pitch black, and the look on their faces was extremely ugly, in addition to shock, more fear and panic.

"Immediately, immediately turn on all the dome artillery fire to attack the ground!" immediately a bachelor shouted.

As soon as the bachelor's words fell, the sergeant sitting next to him grabbed his clothes and said viciously, "Are you crazy? There are also our warriors and church people in there, do you want to kill them and clear the way for the abyss monsters?"

If it were a normal time, the sergeant's rude behavior would definitely be accused by the other scholars, and even provoke a political battle between the bachelor and the sergeant, but now everyone's mind is on the abyss defense zone, and no one cares about the dirty little things between the bachelor and the sergeant.

"I'm going down, check on the situation, and preside over the battle!" Alice got up from her seat and prepared to walk out of the conference room and back to the defense area.

"Wait! you can't go down now. The speaker of the meeting stopped Alice, and then when Alice looked at him puzzled, he explained: "When you enter the defense zone at this time, you must open the gate, and the holy word on the gate will inevitably be affected, and these abyssal forces will definitely penetrate at that time." ”

Alice frowned and said in a deep voice, "Isn't there any other way to enter the defensive zone?"

"Nope. The Speaker shook his head, and then said very solemnly: "I now order, in my capacity as Chairperson of the Management Council, to carry out Defense Plan No. 7. ”

"Defense Plan No. 7?" everyone was stunned when they heard this, and then they quickly realized something, and they all looked at the white-haired Speaker with shocked expressions.

Defense Plan No. 7 is known as the final defense plan in the management of Lanxi City, and the method is very simple, which is to use the heavy partition that has been blessed by the gods countless times, completely block the entrances and exits of all the abyss defense areas, and then adjust the output power of all the energy cannons in the dome to the maximum, and carry out indiscriminate attacks on any movable objects on the ground.

In other words, this is an enhanced version of the previous dispute between the sergeant and the maester.

"No way!"

"No way!"

"Are you crazy?"

"Not yet!"

For a time all the scholars and sergeants who had come to their senses objected together, and one by one they glared at the Speaker angrily, as if they were looking at sinners.

"I'm very conscious, and now I'm making the right decision. The speaker's face was also very pale, and he said in great frustration: "You think about what happened before, and then look at the strength of this wave of abyssal tides, it is obvious that these abyssal monsters have been preparing for this invasion for a long time, and may even have figured out the details of all the defense systems in the defense area, so those people in the defense area are absolutely unable to ......."

"Wait!" Alice interrupted the Speaker, "Mr. Speaker, I think we should wait a little longer, someone should be able to salvage the situation." ”

"Someone salvaging the situation?" said the Speaker, stunned, as if he had thought of something, "You mean that Mr. Leo Dodd?"

"Yes," Alice nodded, seeing that the Speaker was still a little hesitant, and continued, "Don't forget that even if Leo Dodd is not able to stop the invasion of these abyssal forces, we still have a weapon that can stop the abyss, which is the weapon that Leo Dodd took out not long ago and left behind by the ancestors of Lanxi City. ”

"Yes, yes, we have a weapon left over from our ancestors. At this time, not only the Speaker, but also the others thought of it, so they temporarily stopped the implementation of Plan 7 and started the people on the main control computer of the Prometheus, asking them to immediately adjust the subspace engine to the active state and prepare it to launch at any time.

At the same time, in the defensive zone below, which had been completely wrapped in the thick fog of abyssal black oil, everyone was caught off guard by this explosion, and they were also a little panicked at this time, because something like this had never happened, and they didn't know how to deal with it for a while.

But at this moment, all the dreadnought mech sergeants in the defense area received a series of orders in the mental connection system, these orders were different for each team, among which the dreadnought mech sergeants in the frontline theater were ordered to gather together to defend the array operation, contact the clergy, dependents, and fanatics who were also trapped in the black oil fog, and set up defensive positions around different observation platforms.

The dreadnought mecha sergeant in the battery area also received different orders, cooperating with the Holy Cult Army of the Church of the Victims, stationing in various defensive batteries and turning on the battery fire system.

What's more important is that along with these clear command orders, there is also a detailed map of the defensive theater of operations sent to their mental connection system, and the position of each friendly army is marked in detail, even if these black gas mist blocks all sight, but with this map, then they have no fear of hurting friendly troops when attacking.

All the dreadnought sergeants don't know who gave these orders, but the way these orders were issued was at the highest level, even above the Grand Commander Tyrell, and all the orders were extremely clear, completely for the current situation, so even if these dreadnought sergeants didn't know the source of the orders, they still carried out the orders, and as more and more people gathered, the defensive positions had gradually been formed, and the hearts of the people had stabilized.

However, in an observatory, Leo gave orders to the dreadnought sergeant through the plug-in device in the Universal Recorder of the Universe and the control of the surrounding situation by the spirit network, stabilizing the situation, but he did not relax at all, and his eyes were always watching the situation at the entrance to the abyss.