The distance of nearly 800 nautical miles is just a number, but if it is really placed on the surface of the sea, even if it is the speed of the Peregrine Falcon, it will take several days to travel this far.

If such a large circle is to be set up, it means that many islands will inevitably be enclosed in it.

Lukka had never seen this kind of giant magic circle, but according to his experience in drawing ordinary magic circles, any uneven flaw on the plane where the formation map was located would have a great impact on the completion effect.

The magic circles he had drawn before had the magic flow suspended a few centimeters above the ground to avoid the problems caused by the ups and downs of the ground. But they were all arrays with a diameter of no more than five meters, and the magic circle of this size described in this book wanted to keep the magic flow from attaching to other places, even if he used up all his magic power, and then combined with the power of illusion and the power of plastic energy, it would be difficult to do it.

"With such a large magic circle, the effect that can be achieved must not be ordinary, right?" Phil's eyes were full of longing.

Lukka flipped to the back page of the book, read it carefully, and didn't answer immediately, just blinked several times.

"Isn't it so amazing that it scares you?" asked Phil excitedly.

Lukka held the book up in front of him with a frown, and read it word by word:

"Giant Forced Trading Circle, Purpose: Enables all sapient beings within the circle's radius, including but not limited to humans and other humanoids, to trade with the caster. The trade item is determined by the caster, and the transaction form is to buy or sell, and it is exchanged for money and cannot be forcibly taken. ”

"Well, it's just a forced buying and selling?" Phil looked disappointed.

Thea was very interested, and hurriedly asked, "Then what you want to buy and sell, how much will it cost?"

Lukka rummaged back a little further and continued:

"The price of the item is determined by negotiation between the two parties, and if either party abandons the negotiation, the circle will automatically generate a price based on the value of the item, in the currency used by the buyer. If the transaction is carried out in this way, the seller's goods will be forcibly handed over to the buyer by the circle, and the buyer must pay the currency to the seller within 30 days, otherwise it will be considered a breach of contract. ”

"What will happen if I break the contract? If I just won't pay, will this circle still be able to grab it?" asked Ollie curiously.

"Whoever violates the contract will be thrown into a mirror cage created in the magical realm until all the balance is paid. Lukka finally finished the paragraph.

"Are you mages crazy to be poor, do you come up with this way to trick other people into money?" Thea said, shaking her head.

"Don't let the black market know there's such a circle. Ollie said.

"Do they still need this magic circle? Without this, isn't it the same force to buy and sell for so many years?" mentioned the black market, and Luka was angry and didn't fight anywhere.

"I don't think it's that simple. Phil thought for a moment and said.

"Giant circles can't be Jane-" Before he finished speaking, Lukka suddenly stared at the page and stopped, stunned for a few seconds before continuing, "You're right, the danger level of this circle is orange. ”

"Orange?" Phil repeated.

Lukka nodded: "This book divides the danger level of the circle into five levels: white, blue, yellow, orange, red, orange is second only to red. The orange rating indicates that the circle is likely to cause irreparable consequences to the caster himself. ”

"What do you mean by 'irreparable consequences', are all your books in the wizarding world written in such an ambiguous way?" Thea asked.

Luca turned back another page:

"Here's an example! In the year 934 of the Stellar Era, Archmage Collock used this circle to buy the Arcane Crystal owned by the Dragon's Ash Wings, but the two sides couldn't agree on a price, so the circle automatically generated a price.

But Klok didn't know in advance that the arcane crystal was an arcane node on the Jingchuan Mountains, and the price given by the circle was 2,876.927 billion gold coins, and the archmage Klok failed to pay the balance within thirty days, so he was thrown into the mirror cage, and by the time this book was written, it had been 1312 years, and he still couldn't get out of trouble. ”

Thea exclaimed, "That's outrageous, isn't it?

Lukka laughed, "Shut up and mentioned before, the gold coins of the wizarding world, one is about the equivalent of 25 silver coins here. ”

Thea's eyes widened, completely speechless.

Lukka turned the page again:

"Also, in the year 312 of the Comet Era, the high-ranking mage Aldrich used this circle to sell the Ring of Abundance on his hand to the barbarian leader, but because the ring had been integrated with Aldrich over the years, the circle decided that the mage himself was sold to the barbarian leader as an appendage of the ring. Aldrich was taken into the wilderness and disappeared. ”

This time it was Ollie's turn to be breathless: "Even the casters can sell together?

Lukka didn't answer, just kept his head down, thoughtful.

Ollie immediately understood what he was thinking, "You don't want to use this circle and buy the shut back, do you?"

Lukka looked up, "That's exactly what I thought. ”

"What if this circle gives you a price that you can't pay at all?" Ollie was not reassured.

"Well, that's what I thought. Lukka said, "Shut up is at best an index of books in that library, and while it's rare, it's not worth as much as an Arcane Node, and we might be able to afford it in thirty days." ”

"But you're still not sure about the exact price!" Ollie said.

"yes, so I can keep a little longer," said Luca, "Isn't there thirty days? if the price is too much, in these thirty days, I'll make the same circle again, shut up and sell it back, won't I have to pay?"

Phil's face was full of suspicion: "If this method is feasible, why didn't the mage who was locked up sell that crystal back?"

Lukka pointed to the page and said, "This is his back, and when the crystal was pulled down from the mountain and put in his pocket, it lost the function of an arcane node. In other words, when Archmage Locke got the crystal, the value of the goods had already depreciated, and he couldn't sell it back for that price if he wanted to. ”

"I still think it's too dangerous!" Ollie puffed.

"If nothing else," Thea said, "just say this eight-hundred-nautical-mile circle, how are you going to set it up?"

"I haven't figured this out yet. Lukka scratched his head, "So, I'll have to spend some time researching it." ”

He turned to Werner: "Curator, do you have a spare room here? Now that our ship has not yet arrived, let's stay here for a few days and study the circle in this book by the way, no problem?"