Su Lun slowly breathed a sigh of relief and rubbed his somewhat swollen brain, although it was very refreshing to learn knowledge in that state just now, but it was very uncomfortable after quitting.

This sequelae will last for a period of time, Suren did not experiment again, but began to rest, this state sequelae to solve is very simple, just give the brain a rest and rest.

Early the next morning, after a night's rest, Su Lun got up full of energy.

In the next few days, Su Lun began to conduct more in-depth research, and at the same time digest the knowledge and information about the "Demon Tattoo", and during the period of Su Lun's retreat, the development of Zhenbei City was also very smooth.

The damage caused by the last Orc invasion was finally repaired after this period of work, and the collapsed city walls were rebuilt, and the city walls damaged by the earthquake were also torn down and rebuilt, and the rebuilt city walls were wider than the original, twelve meters wide at the bottom and seven meters wide at the top.

The walls were fifteen meters high, and the foundations of the walls were reinforced to prevent them from being damaged again by earthquake spells. It is also mixed with some obsidian to strengthen the magical defense of the city walls. It's not easy to destroy the walls as easily as before.

[Wall: Impenetrable +41, Condescending +25, Range +25, Defense +37, Stability +20, Prosperity +10, Magic Resistance +20, Earthquake Resistance +15, Bronze Wall +20]

All the houses destroyed during the war have been rebuilt, and the new ones have become stronger.

[Residential Complex: Warm in Winter and Cool in Summer +12, Comfort +10, Indestructible +20, Population Growth +10, Stability +20, Popular Heart +15, Earthquake Resistance +15]

After the completion of construction, the infrastructure of the outer city of Zhenbei City continued, and according to Sulun's plan, all roads in Zhenbei City needed to be stone pavement or stone pavement. The width of the main road requires eight horse-drawn carriages in parallel, and the other roads need to be able to accommodate four horse-drawn carriages in parallel.

Although the main road of Zhenbei City seems to be very spacious, compared with the Vermilion Bird Street in the capital of the Tang Dynasty in the previous life, the main road of Zhenbei City is not even a younger brother, at most it can only be the younger brother, you must know that the width of the Vermilion Bird Street in the Tang Dynasty is more than 150 meters. Such a wide main road, not to mention any passing vehicles, is even a football field.

Zhenbei City has been expanded three times, the area seems to be not small in this world, but compared with the Tang Dynasty, the ancient Chang'an City is more than 9,700 meters long from east to west, more than 8,600 meters wide from north to south, the circumference of the whole city is 36.7 kilometers, and the area is about 84 square kilometers.

Zhenbei City is only a fraction of it, although Su Lun has no intention of building this place into a super city like ancient Chang'an, but it also wants to build it into a first-class big city.

Su Lun, the drawings for the fourth phase of Zhenbei City, is still being prepared, and the area will almost quadruple compared to the current one. Of course, this is a long-term goal, and the population of Zhenbei City is too small to support such a big city.

Along with the city roads, there are drainage canals, and the drainage canals in the north of the town extend in all directions, and Su Lun doesn't want to become a country in the city every time it rains, so he attaches great importance to the drainage system. For this sewage, Suren deliberately built a sewage treatment plant outside the city.

The sewage treatment plant is a large purification rune array, in fact, this spell is a druid's spell, the wizards imitated such a spell after studying the druid's spell, the treatment effect is still very good, the sewage treatment plant covers an area is not large, and a lot of materials and magic energy crystals are used on the ground to build a rune array.

Through this rune array, the energy of the surrounding leylines can be gathered here to form an energy pool, this energy pool is very similar to the elemental pool, except that the energy pool can only store three thousand points of energy, and there is a large pool in the sewage treatment plant, which is used to treat sewage, and a huge rune array is engraved under the pool, and these rune arrays are constantly running, and at the same time purify the sewage flowing in.

The sewage purified by the rune array is actually almost the same as the river water, and it is completely drinkable, but Su Lun feels a little awkward in his heart, some of the purified water is used to irrigate the farmland, and part of it is re-flowing into the river.

During this time, in addition to the construction tasks, Zhenbei City also issued a large number of tasks to collect magic plants, which were planted in the Arcane Garden, and now the Arcane Garden has become another landmark building in Zhenbei City.

The rich elemental energy, coupled with the exquisite construction technology, and all kinds of beautiful plants, make many people want to visit closely, but it is a pity that Suren is not open here.

The Arcane Garden's enchanted plants thrive, half of the Fountain of Vitality is used to irrigate them every day, and wizard apprentices come to the Arcane Garden every day to carry out various planting tasks. I believe that it won't be long before the magic plants here will be harvested.

The group of half-elves who like the Arcane Garden the most, Grace specially asked Suren to allow the half-elves to enter the Arcane Garden, there are many druids among the half-elves, and they are still very experienced in cultivating plants, Suren agreed to this request, but he also asked the elf druids to complete various tasks.

With the addition of these half-elves, the Arcane Garden soon became more beautiful, and the half-elves, who were also art lovers, began to modify and decorate some of the sculptural ornaments of the Arcane Garden. It can be said that now this arcane garden has integrated some elven art.

Su Lun is still very satisfied with the development of Zhenbei City. After all, it only took less than two years to build such a city on the wasteland, which can be a miracle.

After digesting and absorbing the knowledge, Su Lun already had a lot of ideas about the "Demon Tattoo" process, but he was not satisfied, but used that little legendary skill point to upgrade the "Demon Tattoo (Mastery)" technique to the "Demon Tattoo (Master)" level.

The master's magic tattoo technique is very powerful, and after mastering this technique, Suren began to transform his lord's guard.

With the development of Zhenbei City, although Su Lun is now facing more and more powerful enemies, although those barbarian warriors are all third-level professionals, they no longer have the overwhelming advantage they had in the face of the current enemy.

Just like last time, Su Lun led people to attack the frost giant, the ordinary frost giant is the fourth order, if it wasn't for the heavy damage of the ballista and the baptism of spells, the barbarian warriors would have suffered even more casualties.

These barbarian warriors are not heroes, and it is difficult to continue to improve their strength unless they can rely on their own strength to become heroes, but this is too rare.

But now that he has the magic tattoo technique, Suren plans to try it on these barbarian warriors.

Suren took out all the well-preserved Frost Giant blood from the warehouse. He intends to bless the power of these frost giants on the barbarians.

The Frost Giant's blood is numerous, but most of it is of little value, and needs to be purified and condensed before it can be used, Su Lun built a rune array to purify and condense the blood, and then purified the Frost Giant's blood little by little.

Su Lun was already very familiar with this kind of operation, and after preparing the rune array, Su Lun chose to officially start. The Frost Giant is said to have the blood of the Titans, but this bloodline is already very thin.

In fact, the closest bloodline to the Titans is the Storm Giants, but those Storm Giants are few in number and live in the sky, so it is not easy to go up.

There were a lot of impurities and a lot of worthless things in the blood of the frost giant, and after spending a lot of time purifying this blood, Su Lun obtained about two liters of blood, and the blood of the frost giant was filled with more than a dozen large vats, but in the end, only two liters remained.

After preparing the other magical materials, Suren began to inscribe the magic patterns on the barbarian warriors.

After condensation and purification, the blood of the frost giant was named the blood of the giant by Su Lun, if this blood was discovered by the frost giant or other giants, it would definitely be snatched wildly, this bloodline could make his original bloodline more powerful, and even have a certain chance of atavism.

The material used to engrave the magic pattern for those barbarians is the liquid prepared by the blood of the giant as the main material, and in addition to the blood of the giant, dozens of magic materials such as arcane dust, astral silver sand, blood essence grass, and evening primrose are also added, which Su Lun invented himself based on the knowledge in the magic tattoo. After blending, the final blood has been made pale gold.

The first person willing to experiment was Suren's captain of the guard, Johnson. Instead of shaving the whole body like the early Devil Tattoos, the Devil Tattoo only needs to shave the place where the Devil Pattern is inscribed, and Suren makes Johnson lie down on the lab table, and then casts a hypnotic spell on him.

After the spell has taken effect, the inscription begins, using the blood of giants to engrave the magic pattern, and if successful, these barbarian warriors will have some of the abilities of giants and their strength will be increased.

Su Lun controlled the wizard's hand and began to engrave the magic pattern on Johnson's body, before that, Su Lun had done thousands of experiments, and at the same time conducted experiments in the system, and after he was sure enough, he began to cast.

As the silver-white carving knife continued to swim, the mixed blood was engraved on Johnson's body little by little. One rune after another was quickly completed in Su Lun's hands, and the pale golden liquid slowly merged into the runes, and soon the runes enveloped most of Johnson's body. Finally, after Su Lun carved the last sword, all the runes were scattered.

A dazzling aura appeared on Johnson's body, and a breath from the ancient wilderness also appeared, Johnson's body continued to become stronger, and finally all the aura dissipated, and Johnson gradually returned to his original state, but in Su Lun's attribute column, Johnson's information had more things.

[Giant's Power]!