It took nearly half a year to repair the half-plane, and another two years to clean up the pollution. If it weren't for the high-grade demons, it would've taken even longer.
The half-plane was heavily polluted. At first, Suhlen and the others used neutralizing powder to purify it, but it wasn't very effective and could only weaken the pollution a little. It wasn't very effective against stubborn pollution.
Most of the pollution in the half-plane was like this. In order to clean up the pollution, Hathaway finally used another method, which was to use a large amount of purifying water to wash the half-plane back and forth. This method could quickly dilute the pollution.
If it was in a material plane, this method would remove the pollution, but at the same time, it would cause the pollution to spread. However, it was different in a half-plane. The half-plane was a sealed space, and the pollution couldn't spread at all.
After using the purifying water, Suhlen would directly open a space crack and let the polluted water flow into the void. The void's omnipresent space storm would completely tear the polluted water to shreds.
There was no need to worry about the polluted water contaminating other places. The space storm would quickly split the water into molecules or even smaller particles.
After a dozen or so cleanses, the Northwind Tower spent a lot of money and finally reduced the pollution to below the standard value.
The rest of the pollution could only be slowly recovered with time. In fact, there was a faster way, which was to plant the wisdom ancient tree in the half-plane. The wisdom ancient tree's purification field would completely purify the whole plane.
After a few years, the half-plane finally returned to normal. Then, the renovation plan began. This half-plane would be the logistics base of the Northwind Tower.
.....
It had been a few years since the last explosion of the elemental fusion furnace. In these years, Hathaway hadn't stopped experimenting with the elemental fusion furnace. Finally, a year ago, the elemental fusion furnace was completely perfected.
The elemental fusion furnace wasn't big, but the energy it provided was almost endless. With the elemental fusion furnace, the floating city's energy problem was solved.
The renovation work of the northern city had never stopped. In fact, the renovation work was getting faster and faster. This was mainly due to the increasing number of wizard apprentices in the Northwind Academy. These apprentices had completed their transformation from ordinary people to wizard apprentices and began to accept large amounts of missions to earn resources.
And the safest and most profitable mission was to modify the floating city. Although the strength of these Apprentice Adepts was very low, they were still much stronger than the slaves and workers. The transformation work, which was originally quite difficult, began to speed up.
At the same time, the water elementium circulation system, life circulation system, air circulation system, and other supporting systems of the floating city were completed under the combined efforts of the adepts.
The progress of the entire Floating City was quickly completed. By the time the Elemental Fusion Furnace was completed, the main body of the Floating City was almost finished.
The original puzzle of the Northwind Tower also needed to be modified. The previous puzzle could only cover a range of 500 meters around the Northwind Tower. This kind of puzzle worked well, so Suren, Hathaway, and Alex worked together to upgrade the puzzle.
This puzzle was upgraded into a man-made Magic Net. The man-made Magic Net relied on the Elemental Fusion Furnace. With the support of powerful energy, this Magic Net controlled an area of 50 kilometers. This man-made Magic Net had all the functions of a Magic Net. After entering the range of the man-made Magic Net, those without permission would have their spellcasting ability greatly restricted.
High-grade wizards would lose their spellcasting ability directly. High-grade wizards would also have their spellcasting ability greatly reduced. Only legendary wizards were basically unaffected. For those with permission, they only needed to use a small part of their power to cast certain spells. Moreover, being in the range of the Magic Net would also give them a boost in mana recovery.
At the same time, they would also receive permanent spells such as Flight, Mage Armor, and Energy Deflection Force Field. These spells would always be there.
In addition to the man-made Magic Net, the ecosystem of the floating city was also almost complete. After the various systems were installed, these systems would activate the ecosystem system. The range of the ecosystem system and the man-made Magic Net were the same.
The ecosystem system would allow the floating city to maintain an environment similar to that of the main material plane in any environment. At the same time, it could block the outside environment from affecting the floating city.
With the ecosystem system, the floating city could enter the astral plane. Low-grade wizards and ordinary humans who were not strong enough would not die from extreme environments.
In fact, if ordinary people could live in the astral plane for a long time, there were still many benefits. After all, the astral plane was filled with a large amount of source energy.
This was the most basic energy in the multiverse. Even if one did not have the aptitude to become a wizard, after removing the source energy for a long time, they would still gain a lot of benefits. During the period of the Arcane Empire, many floating cities would enter the astral plane for a fixed period of time.
In addition to collecting materials, another reason was to promote human evolution. After coming into contact with the source energy, the human soul would evolve under the influence of the source energy. These evolved humans would gain psionic abilities.
Just like the Githyankis who lived in the astral plane, they were born with psionic talents and could become psionicists. These evolved humans were also called astral humans.
If they completely adapted to life in the endless sea of stars and truly became an astral race, then over time, more psionic talents would be injected into their genes.
However, if they left the astral plane and returned to the material plane, then this psionic talent would gradually disappear. If they lived in the material plane for too long and did not enter the astral plane, astral humans would also transform back into ordinary humans.
Of course, this talent did not completely disappear, but was hidden in their genes. Once they entered the astral plane again, this ability would be reawakened.
After several years of hard work, Suhlen's floating city finally took shape. After the energy source of the floating city was completed, the next step was to install the most important floating ring of the floating city.
Lifting up a city required a very high level of technology. At the same time, it also required a lot of precious materials. Fortunately, the Underground World was rich in mineral resources. After accumulating a lot of precious resources over the years and purchasing a lot of materials through trade, this large floating ring was finally built.
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