The old dragon

The battle between Deathhook Bear Lord and Smash Tyrannosaurus was over, and soon there were other masters and pet masters fighting.

Su Huan did not continue to stay in the fighting arena to watch the battle, but left the fighting arena and walked towards a majestic building located in the center of the fighting area in the lower city.

This building is the landmark building of the downtown fighting area, the downtown hall.

It is also the place where the manager of the entire lower city fighting area is located.

When Su Huan is here, he can receive his reward as the top [-] in the city list.

When Su Huan hurriedly came to the hall of the lower city and informed his intention of coming, the reception staff soon took him to receive the reward.

Fortunately for Su Huan, the Frost Dragon Heart was still quietly lying in the warehouse, as if no one cared about it, and no one had claimed it in just ten days.

Although the Frost Dragon Heart is also a genuine disaster material, among the rewards for the top [-], its value can only be regarded as a mid-to-lower one.

And often for drivers who have no specific needs, the exchange value is not high at all.

Therefore, it is a dust-depositing item.

When Su Huan left the hall of the lower city with this ice dragon heart like a huge sapphire, his mood was quite agitated.

"The transformation materials of Frost Dragon Girl have been collected."

"It's only a matter of time before the Frost Dragon Girl enters the full stage, and it is foreseeable that the time will not be too long."

After Su Huan left the hall of the lower city, he left the secret meeting city directly.

Outside the secret society city, I found a remote place at random, summoned the energy-absorbing treasure tree dragon, got into the void, and left the secret society island.

Before leaving, the energy-absorbing treasure tree dragon had already left the void anchor point of the secret meeting city.

The next time you can travel directly through the void, you can come back, and you don't need to waste time on the road.

In just a few hours, the body of the energy-absorbing tree dragon emerged from a crack in the void outside the Thunder Fortress.

Outside the Thunder Fortress, all void cracks are monitored to avoid attacks by void creatures.

Therefore, Su Huan let the energy-absorbing treasure tree dragon get out of the void outside the Thunder Fortress.

In the same way, the same is true for the Secret City.

Su Huan only left for a short ten days.

Thunderhold looks exactly the same as when he left, nothing has changed.

However, Su Huan has changed a lot in the past ten days.

Not only has the strength of controlling pets reached a new level, but a lot of transformation materials have also been collected.

It has to be said that the secret meeting city is worthy of being the place with the richest high-level resources and materials in the entire Yashan Peninsula.

There are even items and treasures sent over for trade from areas other than the Ashan Peninsula.

Before leaving Thunder Thunder Fortress City, the transformation materials Su Huan collected were still in single digits.

At this point, most of it has been collected.

On average, there is only one or two pieces of transformation material missing for each Pet Controlling.

The transformation materials of the Frost Dragon Girl have already been assembled.

After returning to Thunder Thunder Fortress City, Su Huan immediately went to the Giant Spirit God Design Office.

That is, the construction organization that Su Huan plans to invite to build the "New Black Lantern Fort".

Calculating the time, the design plan and preliminary estimate of the Julingshen Design Institute should also be completed.

Su Huan couldn't wait to know the possibility of building a "New Black Lantern Fort" on the Diezhang Peak.

Su Huan has always been very concerned about the construction of the "New Black Lantern Fort".

Although this place is good, it is not my hometown.

[692.682, New Black Lantern Fort Design]

In the Julingshen Design Institute, Su Huan was surrounded by a group of designers from the design institute, staring intently at the holographic image of the architectural plan in front of him.

In the image, there is a bird's-eye view of a majestic giant city located on a mountain peak thousands of meters away.

The entire giant city is completely built on the side of this peak.

The winding mountain road leads from the foot of the mountain to the city on the mountain.

Countless buildings are located in the meantime, and there are many buildings everywhere from the foot of the mountain to the top of the mountain.

It can be seen that these architectural styles are different.

There are ordinary high-rise buildings, as well as schools, hospitals, shops, training dojos, government halls, factories and even barracks and towers.

But these buildings, no matter what function they seem to have, look like a fortress, not an ordinary building.

That's right, according to Su Huan's request, the designers of the Julingshen Design Institute designed the entire city with the original intention of designing a military fortress and fortress.

Any building pursues the ultimate defense.

Even ordinary houses are no exception.

This kind of construction mode naturally requires far more funds than ordinary buildings.

But Su Huan didn't care about spending money, what he cared about was whether the "New Black Lantern Fortress" he built could become a fortress that could stand up to the nest disaster again and again.

Beside Su Huan, several top designers from Giant Spirit Design Institute were explaining the design plan to Su Huan.

"In the outermost area, we adopted the defensive design of Starling Fort. The defensive power of Starling Fort far exceeds that of ordinary military fortresses."

"One can resist the attack of the nightmare species head-on, of course, it can only resist for a short time."

"According to our design, every three star forts form a defense module. The three-pointed star fortress is in the shape of an angle. If equipped with cutting-edge weapons, it can counter a large number of invading terrorist species, and even attack The incoming nightmare species can also cause not weak counterattack damage."

"The cost of a Xingling Fortress is around 25 billion thunder coins, and it can accommodate 100 soldiers, while the cost of a set of triangular Starling Fortresses is around 75 billion. With a cost of [-] million yuan, a series of joint module transformations are required to enable it to exert the strongest linkage combination capability."

"According to the best design model, if it is a mountain city with a capacity of 1 people, it is best to build a group of triangular star fortresses, which will be able to stand upright in a medium-scale disaster."

"If it is a city with 1000 million people, it is best to build a thousand groups."

"However, because the cost of the Starling Fort is astonishing, this is only theoretical. The Eagle's Nest Fortress that our Giant Spirit Design Institute participated in the construction of is also a mountain city built on the mountain, and it also uses the three-pointed Starling Fort defense module."

"However, for the Eagle's Nest Fortress with a population of tens of millions, only 150 triangular Star Fortresses were built in the end, which is really too expensive."

At this moment, Su Huan didn't pay much attention to what the designer said, his attention was already attracted by the Xingling Fort displayed by the magnified holographic image.