After reading all the contents of the information, Rocky looked up at the fortress in front of him, and his gaze unconsciously changed.

Because now he already knows that the big guy in front of him is not an iron lump, but a mobile fortress!

Don't look at the addition of just two words of movement, but this makes the fortress in front of you immediately have a qualitative change, just imagine, if such a behemoth more than ten meters high, like a small building, if it moves, what kind of scene will it be? What kind of fate will it be in the face of such a behemoth enemy?

To be honest, Rocky was quite shocked when he learned that the fortress could be moved, because the idea was like Sky City, which had subverted his perception and made him feel deeply incredible.

Also surprised was Karina, who looked at the fortress again after reading the previous material and thinking completely different things from Rocky.

"This thing...... How do you get it out?"

Looking at the fortress, Karina was already thinking about how to get this behemoth out!

"This ......"

In fact, Rocky was thinking about it now, so he looked up at the top of his head.

"It doesn't look like it can be opened directly......"

"You can only drive out. ”

At this moment, Orton, who had been observing the fortress, spoke, and as he spoke, he pointed to the end of the factory: "That's the exit." ”

"Oh?"

Looking in the direction of Orton's finger, Rocky saw that there was indeed a huge gate at the end of the factory, and then he understood.

At the beginning, Subin and the others made a mobile fortress here, definitely not to leave the fortress underground after finding it, so he must have already thought about how to open this fortress, so he didn't have to worry about this at all, in fact, Rocky now has to worry about the same problem as Subin at the beginning, that is, how to make the behemoth in front of him move!

Su Bin had already said in his last words that the mobile fortress in front of him had already been developed, and the reason why it was still here was very simple, because there was no magic energy as energy, so it couldn't move, which means that as long as Rocky solved the problem of magic energy, all the problems would be solved.

Thinking of this, he hurriedly asked Orton.

"Teacher, how much magic does it take to make this thing move?"

"Lots of ......"

Glancing at him, Orton looked down at the other document in his hand, which was the research material on the Moving Fortress that Subin mentioned at the end.

After that, about ten minutes later, Orton raised his head again, and then said, "If you want this thing to move, you need the same amount of magic energy as the combined magic energy of three battleships." ”

"Three battleships?so many?!"

Rocky was taken aback when he heard this number, because this number was too exaggerated, the battleship was almost the largest battleship in the air, it was a big guy with a length of three or five hundred meters, and the mobile fortress in front of him was also a small man, how could the magic energy required to activate it be even more?

"Stupid! This fortress uses magic technology from a hundred years ago, can it be the same as it is now!"

As a result, Rocky had just shown a surprised expression, and Orton glared at him, and in one sentence he explained the reason for the huge consumption of the mobile fortress.

After all, the behemoth in front of him was created a hundred years ago, and the technology used was also a hundred years ago, so naturally it cannot be viewed with the eyes of the present.

After glaring at Rocky, Orton continued, "You two go back now, go back and get ready, and bring all the magic stones you need, and I'll stay here and study how to operate this thing." ”

Although Orton has not taken a position on the Moving Fortress, it is clear that he is still quite interested in this last bit of legacy left by the kingdoms.

And since he said so, Rocky and Karina naturally didn't delay any longer, and the two sides immediately split up, Orton stayed here to continue to study the mobile fortress, while the two of them immediately returned to Sky City to prepare.

According to Orton, in order to make the mobile fortress move, it needs super large magic energy to support it, and this is naturally not a problem for Rocky and Karina, both of whom are city lords and both raise fleets, and there is definitely no shortage of magic stones.

However, the greater the demand for magic energy, the more magic stones are needed, and the real problem that the two of them are facing now is how to transport a large number of magic stones to the underground factory.

So after returning to the ground and re-elevating, the two of them did not rush back to Sky City, but observed in mid-air.

"It seems that the only way to meet them is to use a small transport ship, and the float ship will land next to the research institute. ”

Suspended in mid-air, Rocky said as he looked at the research room below.

"What about the defensive circle?"

Also looking down, Karina asked rhetorically.

Rocky was right, using small transport ships to transport the Philosopher's Stone, and then transporting it to the underground factory by manpower, this was their only way, but don't forget that the research lab below is protected by a defensive circle, and any target that comes close will be attacked indiscriminately.

In the face of this attack, Rocky and Karina may not matter, but what about the transport ship?

Even if the transport is parked outside the attack range of the defensive circle, what will happen to the person in charge of carrying the Philosopher's Stone?

In this way, an embarrassing thing appeared, the defensive circle that was originally responsible for protecting the research room from the invasion of demons has become an obstacle for Rocky and them at this time, as long as there is a defensive circle, unless it is an empty demon warrior, no one else can approach it at all!

So after frowning and thinking about it, Rocky had to say:

"It's all ruined......

"Ruined, what about the demons?"

The only way to get the transport force close to the institute is to destroy the defensive circle in the institute, but once the circle is destroyed, what will happen to the demons?

You must know that the reason why this place can stand tall in the ruins is due to the protection of the defensive circle, and once the circle is destroyed, this protection will be gone, not to mention what will happen to the research institute, in the face of the demons in the ruins, what will happen to the ships and people responsible for transporting the philosopher's stones?

"I'll send the guards to defend the institute temporarily, and you let the fleet take care of air support, just wait until the teacher drives out the mobile fortress and say anything. ”

Frowning and thinking for a while, Rocky said, it seems that if you want to safely transport the Philosopher's Stone to the underground of the research institute, you can only rely on the guards to go out and let the guards replace the defensive circle to defend the research institute, otherwise there is no other way.