The problem is how to ensure that the final petrification effect can last for a long time and how to ensure that it is not easily dispelled.

More than a dozen paintings flew out of the carriage and were posted on the high wall built by Rosen. It was the resort manor designed by Rosen.

Lydia asked again: "Then the northern fortress was also built using petrification technology?"

As he spoke, an idea occurred to him, and many long black wooden boxes flew out of the carriage next to him, and at the same time he shouted loudly to the 280 civilian mages present.

Then explain it carefully.

Then asked: "Can you tell me why?"

Hal subconsciously asked: "How to simplify it?"

"And Rosen greatly reduced the scale of a single petrification spell through dexterous casting, developed a large number of extraordinary versions of the petrification spell, and then stacked them layer by layer according to certain rules."

Rosen watched for a while and then said to Lydia and Hal: "Please help me supervise it. It doesn't matter whether the manor is good or bad. The key is to let everyone know how to use it safely."

Halton felt a headache, because the mathematical techniques mentioned by Rosen must be extremely complex, extremely abstract, and extremely obscure, and then an idea suddenly came to his mind.

Lydia didn't say anything, just stared at the stone wall, frowning and thinking hard.

"After adding the circular spell lock, it reaches 21 stars, but after being simplified by the staff, the difficulty of casting the spell is only 5 stars."

He glanced at the crowd: "However, the wall I built with 1 mana requires 20 mana to dispel, so it would be better to just use attack spells to bombard them head-on."

Hal hurriedly asked: "Lediya, what's wrong? Is the structure of the staff too complicated?"

"It's not just me, my wives and I created it together."

Rosen nodded: "It's almost this number, that's twenty times the mana consumption ratio."

Lydia looked confused: "I feel like my spell has taken effect, but it has not fully taken effect."

But Lydia has already figured it out.

Hal also understood.

Lydia used the purification spell first.

As you can tell from the name, this spell is very targeted, like a key that can easily open a lock if inserted into the right hole.

The advantage is that the effect is good, but the disadvantage is that it greatly increases the complexity of the spell and the difficulty of casting it.

After about ten seconds, the clay wall completely condensed and turned into a solid stone wall that was earthy gray and covered with agate-like textures on its surface.

Hal said: "This is indeed a good idea, but the commission should be expensive, right?"

Lydia and Hal's mouths opened slightly.

Hal thought about it carefully and then asked: "What if there is a bastard who develops a dispersion technique specifically for petrification?"

Hal's eyes lit up and he thought of something, but he didn't want to understand it clearly, so he couldn't say it at once.

But the clay wall will definitely not last long, and it is estimated that it will deform significantly or even collapse in a few minutes.

Rosen snapped his fingers: "That's it."

"The Great Wall. Nice name."

"right."

Even if no one intentionally dispels it, the weather disturbance alone, such as rain, snow, and sunshine, is enough to cause the spell's effect to quickly disintegrate.

"I seem to be rapidly being thrown away by the times!"

He also used the upgraded version of the mid-level shaping technique of the mage's hand, and his dexterity was also improved to the extreme. He lifted a large amount of clay from the ground and turned it into a high wall in the manor yard according to the expected terrain.

He raised the magic sword in his hand high and pointed towards the stone wall.

As a result, Yue Nu was taken into the Golden Hall by the Duke of Storms at a high price.

Rosen didn't hide it either: "Because of his dexterity in casting spells."

The attack spell released with 20 points of mana will hit the front, and the destructive effect will definitely be greater than the dispersion spell. Therefore, the dispersion spell will lose the meaning of dispersion.

A bright lavender light ball rushed out of the tip of the sword and flew quickly around the surface of the stone wall. At the same time, it continuously released lavender, lightning-like magic energy against the stone wall.

The first one to take action was Lydia.

This wall is 5 meters high, half a meter thick, and 10 meters long. After being shaped by plastic surgery, it maintained its shape for a while and then temporarily maintained its shape.

Hal's eyes widened: "Hey~ You, the mayor, are planning to run away?"

"It's also because of the dispersion rule of one method destroying one method, and up to three methods."

He smiled and said: "Such a complex petrified wall may still not be used to build important buildings, but there will be no problems in building ordinary residences, solidifying roads, and building water channels."

"Finally, I will issue a decree in the territory to strictly prohibit mages from using dispersion spells in small towns."

Laidiya nodded: "It's almost the same ratio."

"So, the dispersion spell is actually effective, but because there are too many spells and they are too complicated, only part of them are effective."

"So, you're going to find that crazy woman?"

Rosen sighed again: "It's my fault that I was only thinking about making money, but in the end... ugh~~~"

Hal came over and patted Rosen on the shoulder gently: "I understand, just go ahead and leave this place to us."

So, Rosen left five Silver Moon Rangers to help, and he took the other five rangers, got on the carriage and rushed to Vivian's Lily Manor.
Chapter completed!