It took nearly half a year to repair the half plane, and then it took two years to remove the pollution. If those high-level demons hadn\'t been working all the time, it would take more time to remove the pollution.

The pollution in the half plane is very serious. At the beginning, sulun and others used neutralization powder for purification, but this purification effect is not good and can only weaken some pollution. The effect is very poor for stubborn pollution.

Most of the pollution in the half plane is this kind. In order to remove these pollution, Hathaway finally adopted another way, using a large amount of purified magic water to wash the half plane back and forth. This method can quickly dilute the pollution.

If it is on the material plane, although this method will remove pollution, it will also cause pollution diffusion at the same time, but it is different in the half plane. As a closed space, these pollution can not diffuse in the past.

After cleaning with purified magic water, Su Lun will directly open the space cracks and flow the magic water containing a large amount of pollutants into the void. The ubiquitous space storm in the void will completely tear up these polluted water sources.

There is no need to worry that these polluted water sources will pollute other places. The raging space storm will soon split these water sources into even smaller particles.

After more than ten times of flushing, the north wind tower spent a lot of money to finally reduce these pollution below the standard value.

The remaining pollution can only be recovered slowly over time. In fact, there is also a faster way, that is, plant the ancient wisdom tree in the secret land into this half plane, and the purification field of the ancient wisdom tree will completely purify the whole plane.

After several years, the half plane finally returned to normal, and then the transformation plan began. This half plane will be transformed as the logistics base of the north wind tower.

.....

Several years have passed since the last element furnace explosion. In these years, Hathaway\'s experiment on the element fusion furnace has not stopped. Finally, the element furnace was completely improved a year ago.

The whole element fusion furnace is not large, but the energy supply is almost endless. With the element fusion furnace, the energy problem of floating city has been solved.

The reconstruction of Zhenbei city has never stopped, and even the reconstruction project is getting faster and faster. This is mainly due to the more and more wizard apprentices in Beifeng college. After completing the transformation from ordinary people to wizard apprentices, these apprentices began to take a large number of tasks to earn resources.

The safest and most stable task is to change the work of the floating city. Although the strength of these wizard apprentices is very low, they are much better than those slaves and workers. The transformation work, which was still quite difficult, began to accelerate.

At the same time, the water element circulation system, life circulation system, air circulation system and other supporting systems of the floating city are also assembled one by one under the joint efforts of many wizards.

The progress of the whole floating city is rapidly completed. After the completion of the element fusion furnace, the main body of the floating city has been transformed very little.

The original mystery lock of the north wind tower also needs to be transformed. The previous mystery lock can only cover the range of 500 meters around the north wind tower. The effect of this mystery lock is fairly good. SULEN and Hathaway Alex work together to upgrade the mystery lock.

The mystery lock was upgraded into an artificial magic net. Relying on the element fusion furnace and strong energy support, the artificial magic net controlled a radius of 50 kilometers. This artificial magic net has all the effects of mystery lock, and after entering the scope of the artificial magic net, the casting ability of people without permission will be greatly limited.

Below high-level wizards, they directly lose their spell casting ability, and their spell casting ability is also greatly reduced. Only legendary wizards are basically unaffected. For those who get permission, they only need to use a small part of their power to release some specific spells, and they are in the scope of mystery lock, and they will also get a magic recovery bonus.

At the same time, you will also get resident spell blessings, such as flying, Mage Armor, energy deflection force field, which always exist.

In addition to the artificial magic net, the ecosystem of the floating city is almost completed. After the installation of various systems, these systems jointly activate the ecosystem system, and the scope of the ecosystem system is consistent with that of the artificial magic net.

The ecosystem system can keep the environment of the floating city close to the main material plane in any environment. At the same time, it can block the external environment outside the floating city.

With the ecosystem system, the floating city can enter the star world, and those low-level wizards and ordinary humans with insufficient strength will not die because of the extreme environment.

In fact, if ordinary people can live in the star world for a long time, there are still many benefits. After all, the star world is full of a lot of source energy.

This is the most basic energy in the multiverse. Even without wizard qualification, you will get a lot of benefits after removing the source energy for a long time. During the period of the arcane Empire, many floating cities would drift into the star world for a fixed period of time.

In addition to collecting materials, another reason is to promote human evolution. After contacting the source energy, the human soul evolves under the influence of the source energy. These successfully evolved humans obtain psionic ability.

Like the GIS Yankees who live in the astral world, they are naturally gifted with psionics and can become psionicians. This evolved human race is also known as the astral race.

If you completely adapt to living in the endless star sea and really become an astral race, more psionic talents will be injected into your genetic genes over time.

However, if you leave the astral world and return to the material world, this psionic talent will gradually disappear. If you live in the material plane for too long and do not enter the astral world, astral humans will degenerate into ordinary humans again.

Of course, this talent does not completely disappear, but is hidden in their genes. Once they enter the astral world again, this ability will wake up again.

After several years of efforts, sulun\'s floating city finally took shape. After completing the energy source of the floating city, the most important floating ring of the floating city also began to be installed.

The floating ring supporting a city requires a high technical level and a large amount of precious materials. Fortunately, the underground world is rich in mineral resources. After accumulating a large amount of precious resources for several years, it has purchased a lot of materials through transactions. Finally, this large floating ring has been built.