That was the wizard city - Greenriel! The city was built between the mountains and was circular in shape, like a huge gem inlaid between the mountains. A large number of high-level magic crystal cannons were set up on the towering walls. For unknown reasons, they turned their muzzles towards the airship without anyone controlling them.

Lin En has seen the power of this thing. It can even severely damage the powerful Eye of Death.

But he was not here to invade, as he had already reported the situation through the alchemical communication array. Besides, there were two great wizards on the airship, so Lin En was not worried about them being attacked. Instead, he looked directly at the spire tower that towered into the clouds in the center of the city. It was shining with magical light in the afterglow of the setting sun and looked very eye-catching.

"Is this the Corona Tower?" Lynn whispered to himself.

Raphael nodded and responded, "Yes, this is the Corona Tower, the symbol of the Wizard City!"

"Master Raphael, can I ask why this tower is called this name?" Lin En asked. After experiencing what happened at Yieta Harbor, he felt a little traumatized when he saw this tall spire.

"Actually, its original name should have been the Tower of Eclipse or the Tower of Invisibility, but because these names have bad meanings, it was changed to the Corona..." Raphael explained.

In mid-July every year, under the noon sun, the shadow of this magic tower will completely overlap with the base, forming a shadowless tower.

Of course, all the buildings in Green Riel were like this that day, but the Corona Tower was very tall and the most impressive.

The calendar and time of the wizarding land are also divided according to the length and angle change of the shadow of the Corona Tower under the sun. It is a perfect 360 days, divided into 12 months, and each month has exactly 30 days.

"Nice design!" Lynn said with a raised eyebrow.

In this way, the entire tower is a huge clock.

As for the cause of the Shadowless Tower, he could guess that it was simply because the tower was directly under the sun in mid-July.

As the two were chatting, the airship had already passed into Greenriel and landed in the square in front of the Magic Seminar Association on the east side, attracting a large group of wizards to watch.

After all, everyone came here by carriage, and they were the most special.

"Is this the airship? It's even bigger than what I saw in the newspaper..."

"It's really impressive. If it's not expensive, buying an airship for travel would be a good choice..."

There was a continuous stream of noisy discussions. In view of the previous publicity by the Magic Daily, Lin En and his airship had already been known to everyone. However, the picture was naturally not as shocking as the real thing. Those alchemists even began to discuss the design principles of this alchemical instrument.

It can fly and hover without wings. Could it be that it is using some kind of force field magic?

So, as soon as Lin En and his companions got off the airship, they felt countless pairs of eyes staring at them. It was obvious that they had become the focus of the whole audience.

Compared to Lynn who was very calm, Johnny, Alok and others who arrived in Greenrill for the first time to attend this event seemed a little uneasy.

Philip straightened his robe. Even when Master Helram was leading the team in the past, their Iyeta School had few opportunities to show up like this.

"Mr. Philip, Mr. Lynn, welcome to Greenrail. Please follow me!"

"Well, two masters, see you tomorrow!" Lin En said goodbye to August and Raphael, and then followed the tall wizard to the private lounge of the Iyeta School.

After arranging the accommodation, Philip quickly pulled Lin aside. "Have you figured out how to deal with those wizards from the prophecy school tomorrow?"

“Of course…” Lynn stretched out her tone, “No!”

Philip was completely confused. He had seen Lin En's extremely calm appearance before, and thought that he had already prepared for it, but he didn't expect that he was totally unprepared.

But before Philip could get anxious, Lin En spoke again. "If you can help me get the detailed data of the star map of the Prophecy School, then I will be absolutely sure!"

"This is easy. Just wait, I'll be back soon..." Philip went out in a hurry. The wizards of the School of Prophecy had published their research results in previous issues of the Magic Daily. There were also corresponding records in the library, so it shouldn't be difficult to find.

Lin En took out a piece of parchment from the table and wrote down the famous Kepler's third law and the law of universal gravitation...

If he wants to understand the laws of the orbital motion of stars, he needs to observe continuously for dozens or even hundreds of years. It is definitely too late for him to do it now. Fortunately, those wizards of prophecy have already completed the most complicated work for him. He only needs to verify whether the theory is correct.

…

Night in Greenriel, the wizard city.

Lynn came to Harrov's manor alone, ready to meet this famous legendary wizard.

However, when he arrived at the door, he was surprised to find that it was crowded with people. More than a dozen wizards were waiting anxiously at the door, each holding an envelope or manuscript in their hands.

Before Lin En could ask, the door of the manor opened and a witch about thirty years old walked out. Judging from the badge on her chest, she should be a three-ring wizard.

Almost at the same time, the crowd gathered at the door immediately squeezed forward.

"Teresa, this is the data I spent ten years researching. I hope it can be helpful to Speaker Harrov's research." A tall and thin wizard pleaded as he handed over a pile of manuscript paper in his hand.

The rest of the wizards were not to be outdone, and they all came forward to explain their research results in the hope of attracting Theresa's attention so that they could put their manuscripts on the top during their reports. Some even attached a few magic gold coins or even a whole purse to the manuscripts.

Only then did Lin En realize that he was not the only one who knew that Harov was studying gravity and was planning to start from this aspect and had attracted the other party's attention.

(End of this chapter)