First of all, each magic cannon corresponds to a type of magic, such as Fire Dragon Swallowing the Sky, Piercing Wave, Water Dragon Roar and so on.

This requires that the user's attributes must be consistent with the magical properties of the magic cannon.

For example, these two Fire Dragon Devouring Magic Energy Cannons, in order to activate them to launch an attack, you need a fire-attributed knight or magician to inject fighting spirit or magic power into them.

Fire is fire, wind is wind, water is water.

Secondly, the consumption of powering these magic cannons to attack is very high.

The sixth-level Fire Dragon Devouring Magic Cannon can only be used three to five times by a peak Silver Knight at full status;

The seventh-level piercing wave magic cannon can only be used two or three times by a peak golden knight in full condition.

As for the magic crystal, its weight is not enough to carry such a magical weapon.

Unless there is a device that can gather the energy of a large amount of magic crystals and inject it into the magic cannon for use.

However, there is no such device yet.

Lulans picked up a bow at hand, pulled the bowstring, and then released it, making a bang.

"This is a powerful bow. When used with ordinary arrows, the effective killing distance can reach about 100 meters."

As he spoke, he picked up an arrow from the side.

"But this is not an ordinary arrow. It is engraved with the magic speed of wind attribute, which can increase its effective killing distance to 300 meters. If the bow can be fully stretched, it can even reach 400 meters."

Roning picked up an arrow curiously. The dark red arrow was engraved with the familiar fast spell patterns.

"Can't magic patterns only be drawn on Warcraft leather? How can they be engraved on ordinary arrows?"

"It seems that you are more studious than before. You even know so much about spell patterns."

Lu Lan Si said this, and then he suddenly realized something.

There is a light magician in Wubei who can create healing spell scrolls, so Roning is naturally very familiar with this knowledge.

"This type of arrow should have been specially processed, but I don't know much about how it was processed."

Lulans didn't know everything. He only had a superficial understanding of magic-related knowledge.

Roning made a calculation in his mind. When he had time, he would go to the Magic Energy Chamber of Commerce, or visit Dean Miroslav at the Wushan Supernatural Academy to ask for knowledge in this area.

The arrow has an effective range of 300 meters, and with the bonus of speed magic, its power is definitely not weak.

A mid-level knight with wind attribute can use it to cause damage to flying monsters.

If he could find a way, he could also make some for the knights of Wubei Territory, increasing the territory's air defense capabilities to a certain extent.

However, it seems that there are only two intermediate knights with wind attribute in the territory, Kurami and Baburin, and the others cannot be used yet.

Roning picked up another bow and pulled it. For an intermediate knight, it should be enough to pull it halfway. It is estimated that only an advanced knight can pull it fully.

Arrows of this level should have no problem dealing with ordinary flying monsters, but for a dragon like Carlos, it would be painful unless it hit the fragile eyes, but it shouldn't pose much of a threat otherwise.

Next, Roning looked at the spear placed aside.

They are not meant to be used as weapons by knights, but are similar to rapid arrows, except that they require a special launcher to be fired.

Compared to arrows, the swift spear has a longer attack range and greater power! To the griffin, the mana cannon is the most threatening, followed by the spear, and the swift arrow is the last.

This was the answer that Lulans gave to Roning.

"You have the fire attribute, and your subordinates also have the fire attribute. When you return to Wubei Territory this time, take a Fire Dragon Devouring Heavenly Demon Energy Cannon with you. This way, your Wubei Territory's defense capability will be stronger."

In Lulans's opinion, Wubei Territory is close to the Monster Mountain Range. If there are flying monsters attacking the castle, it will be difficult for Roning to deal with them.

"Isn't this... a bit too expensive?"

Luo Ning scratched his head, feeling a little embarrassed.

The price of a magic cannon is already more expensive than magic scrolls of the same level, let alone this high-level magic cannon.

A spell scroll of Fire Dragon Devouring the Sky costs two thousand gold coins, but the price of this magic cannon is as high as one hundred thousand gold coins!

"Since I bought the magic cannon, I have only used it twice in the Battle of Misty City. After that, it has been collecting dust in Wushan Castle. You may be able to use it for something if you take it over."

Lu Lans smiled and said, "If something really happens that can threaten Wushan Castle, you, as the Viscount of Wubei Territory, have the obligation to come and guard it. Just bring it over when the time comes."

Since Lu Lans said so, Luo Ning did not refuse.

"Grandpa is right!"

He thought about it and decided that in order to prevent outsiders from knowing that he had a magic cannon, he might as well just use the space ring to carry it away.

When Lu Lans saw a magic cannon in front of him disappear, he raised his eyebrows.

"Space ring?"

He was puzzled: "Where did you get it from?"

Luo Ning was a little surprised, "Grandpa, do you know about the space ring?"

"Of course."

Rulans said: "Not only have I heard of it, I also know that His Majesty Bruno, Mage Silva, and some dukes have it."

“Even Silva can’t make this thing. What they have is either inherited from their ancestors or obtained from ruins.”

He looked at Ronin and asked curiously, "Where did you get it?"

Luo Ning naturally would not say that he obtained it through the seven-day login method, so the latter would probably ask what the seven-day login is.

"There is also a ruin to the north of Wubei Territory."

Luo Ning said: "I found this space ring and a contract scroll in it."

He leaned closer and whispered, "There is also a giant dragon in the ruins. Now it has become my contracted beast."

"Hahaha!"

Lu Lansi laughed heartily: "You are really good at bragging!"

Creatures like dragons have always been just rumors, and no one has ever seen one.

Not only did his grandson say he had seen it, he also took the dragon as his contracted beast. If this wasn't bragging, what was he doing? Luo Ning helplessly spread his hands and said, "If you don't believe me, I'll summon it to show you at night."

"Haha, then I really need to take a closer look."

On the surface, Lu Lans didn't quite believe it, but he was muttering in his heart, feeling that Luo Ning didn't seem to be bragging.

Could this be true? No way? Luo Ning didn't want to argue any more and waited until the evening to give the other party a little shock.

Anyway, the old man always seemed as steady as a rock, so it must be quite interesting to see the other person’s shocked expression.

Roning observed the series of weapons in the storage room again, and then accompanied Lu Lans away.

After this trip, he gained a new understanding of this world's "air defense system" and knew that Carlos was not invincible. In addition to the Silver Moon Knights and magicians, there were other means that could pose a threat to it.

The damage of magic arrows is limited and can be ignored, but magic spears and magic cannons must be taken seriously, especially the piercing wave magic cannon. Once hit by it, even if Carlos has a strong defense, he will be seriously injured.

Fortunately, it takes a few seconds for the magic cannon to gather energy to form an attack.

During this period, if you can promptly discover the light emitted by the magic cannon when it gathers energy, then you will have a chance to avoid it.

"Brother~"

As soon as we left Wushan Fortress, we heard enthusiastic shouts from the other end of the road. It was Bretton who was greeting us enthusiastically.

"This kid is back."

Lu Lans smiled and said to Roning: "Breton has good talent. He successfully broke through to become an intermediate knight last month."

Luo Ning was immediately surprised and couldn't help but admire: "A 14-year-old intermediate knight, his talent is indeed extraordinary!" (End of this chapter)