This matter has to start with the perimeter protection of Flying Rock City. Lu Yi once asked Mingzi who built the wall of Feiyan City and who blessed the magic circle, Mingzi told Lu Yi that the city wall already existed here before the Righteous Alliance came, and it is said that it was built by several forces entrenched in Feiyan City at the beginning. Those forces also jointly invited a formation mage to arrange this magic circle, intending to occupy Feiyan City for a long time. However, the level of the mages they invited was really not good, and the magic circle arranged was okay to fool these laymen, he took the money and ran away early, and did not carry out later maintenance at all. After a long time, the magic circle began to show all kinds of flaws, and because of this, it also brought contradictions to several forces, they complained and blamed each other, and the gap became bigger and bigger, and finally the Justice League took advantage of the weakness to take Feiyan City. After the Righteous Alliance took Feiyan City, they repaired the magic circle, but there were no too decent formation mages in the alliance, only Mingzi and another fifth-order formation mage could barely talk to each other, so the two of them jointly used what they had learned to repair and strengthen the magic circle, so that the magic circle would maintain normal operation. The other array mage was an early stage cultivator, and he was not in Flying Rock City during this time, but went out to find a suitable circle or see if he could bring in a high-level array mage to improve the circle. Two days ago, the mage came back, and he spent a lot of money to auction a set of sixth-order magic array formation diagrams at an auction, and rushed back to Feiyan City in the starry night, wanting to improve the city's defenses. But when he came back, he found that he was still not able to understand the sixth-order magic circle, and if he wanted to arrange this sixth-order magic circle, the original defensive magic circle would have to be completely abandoned.

Lu Yi originally planned to intervene in the affairs of the Justice Alliance as a formation mage, but now he doesn't have to look for an opportunity by himself, the other party actually threw himself into the net first, and he definitely couldn't let go of such a good opportunity. However, Lu Yi still put up a good shelf, he didn't go to the Justice Alliance, but asked them to bring the formation map to his small courtyard, in addition to Mingzi's father, and the fifth-order formation mage of the Spirit Building Period also came, no need to ask, he must have come to test Lu Yi's true level.

After some politeness, Lu Yi took over the jade slip that recorded the formation diagram from the hand of the formation mage, and when he examined it roughly, he immediately frowned. Lu Yi said to the array mage: "Don't you know, Your Excellency, this is the formation of a water system defense array? Such a formation is arranged here, not to mention how effective it is, just this consumption, how can a small force like you who are composed of scattered people afford it?"

There was a slight look of embarrassment on the man's face, "Lu Gongzi is really as wise as a torch, this set of formations is indeed a set of water system magic arrays. In fact, this is also a helpless thing, now the mainland is in an uproar because of the demon race, and many things are priceless under the soaring prices, and this high-level magic circle is even more sought-after, and it is often robbed as soon as it appears. The old man is already extremely lucky to be able to grab this thing, how can he be too picky!"

This person's words are true, in normal times, the sixth-order formation already belongs to the kind of good things that are highly sought-after, and now the situation on the mainland is grim, and various forces are preparing for war, such things have already risen to the height of strategic materials, and they are naturally more sought-after.

Lu Yi returned the array to the other party, "You asked me for help, it's nothing more than to improve Feiyan City's defense capabilities." This thing is actually easy to do, transform the original magic circle, the effect of the improvement is already very obvious, there is no need to re-make more advanced ones, save this large amount of money, you can use them to do more meaningful things. Give me a few days, and I'll come up with a suitable plan, and I'll let Akiko inform you when the time comes, and let's work together to renovate the city defenses of Feiyan City. ”

With Lu Yi's words, although he has not completely figured out Lu Yi's ability and his true identity, he does not dare to completely rest assured of Lu Yi, but with Lu Yi's help, it is better to treat a dead horse as a live horse doctor than to be helpless. So Mingzi's father said goodbye to the two mages and left, and Lu Yi took Mingzi to the location of the city wall of Feiyan City and began to investigate on the spot. Lu Yi circled around Feiyan City a few times, and then returned to his residence to meditate behind closed doors, and five days later, Lu Yi asked Mingzi to summon her father, saying that the renovation plan had been designed, and let the people of the Justice League come to discuss.

The Justice League's side had obviously been waiting for a long time, so not long after Mingzi's summons, the old guys of the Justice League came running over, waiting to hear Lu Yi's insights.

Lu Yi didn't expect so many people to come, which scared him himself, but it was okay this way, Lu Yi could make them fully realize their value. Lu Yi waved his hand, forming a spiritual light curtain in mid-air, on which was the whole map of the magic circle arranged by the outer city wall of Feiyan City, Lu Yi began to tell everyone about the design ideas of the array mage who designed this array, and pointed out the flaws and loopholes of this magic circle one by one, and came up with the corresponding transformation plan. After Lu Yi's explanation for half a day, basically all the people present had already understood what Lu Yi meant, and the fifth-order array mage who built the spirit was also deeply impressed by Lu Yi.

After Lu Yi explained his transformation plan from beginning to end, he asked the fifth-order array mage, "Do you understand?"

"Understood, understood! Lu Gongzi's formation attainments are really clever, the old man admires, admires!" That person has completely recognized Lu Yi's formation level this time.

"Okay, now that you understand, I won't keep you, you go back and hurry up and reform, just tell Mingzi if you have any questions. Lu Yi gave the order to evict the guests in a blink of an eye, put on a cold posture, and hung a group of spiritual monks on the spot.