It didn't take ten minutes, and when seven minutes later, with a shout from Freya, Catherine dispersed the Phantom Legion that had been struggling to hold on, and if the controlled Sea Clan could retain their consciousness, they must have been very surprised at this time, because a silver metal fortress appeared in front of their eyes.

It is a hemispherical fortress with a radius of about seven meters, and the fortress resembles a soup bowl buckled to the ground, but if you look closely, the fortress is actually not a smooth sphere, but a sphere composed of countless regular hexagonal metal blocks. Around the fortress, there were a total of twenty shooting holes in the metal walls, facing in all directions, including directly above the fortress, and in each of them was a crystal gun, the muzzle and the shooting holes were tightly seamed and slightly recessed into the fortress wall, making it difficult to attack the barrel directly. In the top third of the fortress, there is a grid that surrounds the entire fortress, through this small but dense grid of mesh, the people inside can observe the outside, but the outside cannot directly attack the inside.

About five centimeters or so outside the metal fortress, a magical barrier flashed with faint purple light, and from time to time there were crackling energy streams on the barrier, but it only traveled on the arc of the barrier, and would never interfere with the metal fortress below the barrier. The magic barrier is also hemispherical, the bottom coincides with the bottom of the fortress, and the other parts are slightly wider than the surface of the fortress, except for the energy flow that travels on the arc of the barrier, the magic fluctuations emitted by the barrier are not felt at all, making it difficult to guess the effect of the barrier.

In the eyes of the controlled sea clans, this defensive position seems to appear out of thin air, but in fact, it is the strongest defensive position set up by the three young girls.

As early as Catherine unfolded a circular defensive formation, Lina quickly searched the area, and after confirming that there was no mission target, she first cast a magic spell to carve out a solid and flat ground. After the ground was leveled, Vivien's eyes swept and she shouted in a low voice: "Seven meters in radius, a circular range." ”

"Understood. Freya gave her thumbs up and threw the large backpack on the ground with her backhand. Freya's Giant Backpack is the same as Vivien's, but larger than Vivien's, and was a gift from Vivien when she returned to the party. It's the same eight-fold space, and it's also nested with a weight-reducing circle, but even so, when the backpack falls to the ground, there is still a heavy crashing sound. Throwing down the backpack, Freya even felt that she had become a lot lighter, and couldn't help but move her shoulders to adjust.

"Well, the only good thing about you getting fat. Lina shook her hand casually, and a stone skin technique was put on Catherine's body, which strengthened her defense for a short time, and covered her mouth and laughed in a 'whisper': "In the past, I'm afraid you couldn't carry such a heavy thing at all." ”

"Shut up for me. Freya rolled her eyes and scolded, "Don't be idle, you still have a few parts of mine in your backpack, hurry up and bring them out for me." ”

"Those pieces of metal that can crush people?" Lina said as she opened her backpack, "It's too heavy, I'll leave it at home." ”

"Don't talk nonsense. Freya said angrily: "If you talk nonsense, don't cry when the eldest sister beats you later." ”

"Here you go, you're here. Although Lina kept joking in her mouth, the movements of her hands were not slow at all, and she took out five or six irregular metal polyhedron of different sizes and threw them to the ground at Freya's signal. Freya was doing the same thing, constantly taking out polyhedra of various specifications from her backpack, and in the blink of an eye, large and small pieces of metal were spread all over the floor. All the metal blocks were silvery-white in appearance, shimmering with cold metallic streamers.

"These are all goblin metals?" Vivien, who is also a scholar, was the most sensitive, and at a glance saw the surprise of Freya's removal of these metals, and her eyes were almost bulging: "You can actually use goblin metal?"

"You really don't understand mechanics, I didn't expect to be known as the most amazing genius in a thousand years, but you still have this side. Freya arranged the metal blocks on the ground around her with a dizzying speed, and did not forget to laugh: "These are just assembled from the various parts found in the teacher's material library, as long as you know enough about the machinery, this kind of assembly is not difficult to do, the difficulty lies in the collection and matching of parts, sometimes even a millimeter is not enough." Are you done over there?"

"I'm waiting for you. Vivien held a Mithril metal plate with a diameter of one meter in her hand, and more than a dozen magic carving knives were controlled by the mana thread of the puppet manipulation technique around her, and a rough circular area had been circled on the ground: "I can adjust it according to your three-dimensional range." Don't worry, I'm sure I'll be faster than you, and you'll be ready to get started. ”

"Then I'll get started. Freya nodded, and her fingers began to beat in the air like a piano again. The metal blocks on the ground of various sizes began to change with the beating of her fingers, each piece of metal spreading out layer by layer like a closed bud in full bloom. Under Freya's control, metal blocks continued to float into the air, flying back and forth around a circular space with a radius of seven meters, and their flight trajectories were intertwined with each other, but there was not a single collision in the air.

Soon, some of the metal blocks unfolded into thick metal plates, spliced together with each other, around the bottom of the circular area, against the ground to form a base, under which the threaded metal drill was deeply rooted in the flat ground, firmly fixing the base to the surface. The pedestal is complete, Freya's fingers flick faster and more frequently, and the metal blocks in the sky are constantly changing positions and shapes, making people dazzled. There was a constant clicking sound, which was the locking sound of metal parts joining each other, and the base of the ground began to slowly extend upwards, and the metal walls began to gradually increase in height, and even the rise of the walls could be clearly seen when looking at these silver walls.

"Is it built into a hemispherical shape according to this arc?" Vivien looked at for a moment before asking, "There are no other special changes, right?" ”

Freya just shook her head, it was the most critical moment for her control, and she had no time to distract herself from speaking.

"Okay, then it's my turn. Vivien nodded, placed the metal disc in her hand in the center of the circle, and stood up herself, chanting a long incantation in a low voice. A vague purple ring appeared at Vivien's feet, and the phantom continued to stretch outwards until it expanded to a radius of seven meters. The spell marks on Vivien's hands changed again, and purple lines began to appear inside the ring illusion, and the number of lines increased and increased, and if you looked closely, the length and position of all the lines were completely enlarged according to the Mithril plate under Vivien's feet, and there was no difference between the two except for the proportions. There are more and more lines, and the circle is getting clearer and clearer. When the magic circle formed by the purple light was infinitely close to the reality, Vivien suddenly raised her foot and stepped on it heavily, and the illusory purple circle was suddenly imprinted on the leveled ground, changing from illusory light to real lines.

Vivien took back the Mithril plate, sat down cross-legged in the center of the circle, opened a small leather bag and put it in front of her, took out a three-thousand-ter spar from it, grabbed it in her left hand, slapped her right hand on the ground, and whispered: "Vivien mode, simulation, elemental barrier." ”

The magic array that had become real patterns glowed again with Vivien's slap, and a purple hemispherical shield suddenly appeared, covering the space around the girls. At the same time, Freya's work is nearing completion, and the open-air space overhead is getting smaller and smaller, and when the last few clicks are heard, the last piece of metal is put into place, blocking the remaining open-air space, leaving the girls in a completely enclosed space, with only the parts of the grid communicating with the outside world.

Freya's face, which had been tense since the beginning of her work, reappeared with her usual gentle and elegant smile, and the fingers that had been stopped waved lightly again, and after a few sounds, twenty shooting holes appeared on the fortress, and the twenty crystal energy guns that had been prepared immediately floated up automatically, and each inserted into the shooting hole under Freya's remote control.

"It's done. Freya patted the non-existent dirt on her hand and said with a smile, "Absolutely strong defensive fortress"

"But, that, I still have a question. Lina blinked, played with the silver hair on her shoulder, and asked uncertainly, "Did you forget something?"

"Forget?" Freya asked strangely, looking around to make sure there were no missing parts, "Nothing is missing." ”

"Don't you think there's a lack of people here?" asked Lina, "Is this going to let the eldest sister come in from the ground?"

"Ha, don't worry, this is my fortress, everything inside and outside the fortress is under my control. Freya smiled and clapped her hands slightly, and the sound of metal splicing sounded again, and one of the walls of the fortress suddenly shrank inward to the walls on both sides, opening a one-man high entrance. Freya shouted: "Sister, we're done, you're too hungry, come in and take a break." Rest assured, we'll be very safe here, there's nothing to fear. ”

Catherine, who was already panting and sweating outside, glanced back and reflexively jumped into the entrance of the fortress, which canceled the Legion skill. Freya clapped her hands again, and the walls around the entrance extended again, sealing the entrance completely.

It wasn't until the entrance was closed that Catherine exhaled heavily, wiping the sweat from her forehead and looking around. The interior of the fortress is also a smooth metal wall, and there are no intricate parts to be seen, which are apparently filled between the inner and outer layers. The metal walls of the inner layer are also silvery-white, and appear to be made of goblin metal as well, giving it a rather reliable feel.

"Welcome. Like a courteous host, Freya curtsy to Catherine's elegant and ladylike bowshit: "Welcome to Freya's Mobile Fortress." ”

Accompanied by Freya's welcome words, there was a blast of energy and a boom outside, but apart from the inexplicable screams of the controlled sea clan, the fortress showed no signs of shaking. (To be continued.) )