Compared to the Tower of Courage, it was not good-looking, and when he flew closer and looked at the Tower of Wisdom in the southeast, he still felt a little surprised. This tower still looks like a small dirt platform from the outside, but when you enter the inside, you find that this tower is covered with complicated magic patterns, and it is completely like a magic tower, which is much more exquisite than the tower of courage you just saw.

These patterns were not quite the same as the magic patterns that Koster had seen in the main elven city. They are bigger, more complex, and they flicker in a regular way, as if breathing.

"Koster, here you will be tested by the Wisdom Tower, and only by passing the Wisdom Tower's test will you be able to successfully enter the next round of trials. ”

Caster, who was still quite incredulous about the courage test just now, was still a little stunned at this moment, looked at the Great Elder of the Dragon Clan stupidly, and asked angrily, "What is this test?"

"I'll answer that question," an old female voice sounded in Kerst's ear. Kerst turned around and found an old human figure not far behind him. It just looked like the man wasn't an entity, but something like a magical elf. What's special is that she is a human figure.

"Who are you?" asked Kester, confused.

"Hehehe, I am the tower spirit of the Tower of Wisdom, my name is Otiria, and you are welcome to be tested in the Tower of Wisdom. Taling held out his hands and made a welcoming gesture to Kerster.

"Are you human?" said Kerth, confused.

"Oh no, I'm not human, I've just fought alongside humans, and after my dragon knight died, I liked to keep this human image. The image of the human feminine is indeed more beautiful......"

Kester felt a strange voice in his heart keep saying, "None of these dragons are normal. ”

After gossiping, Kerst realized that the Grand Elder of the Dragon Clan had disappeared without knowing when, and that only himself and the dragon named Otilia were left in the tower.

"So, Chester, can our trials begin now?" asked Otilia gently.

"Okay, no problem, let's start now!" Kerst nodded solemnly, and cheered himself up, signaling that he was ready.

"Okay," Otilia smiled, her magical image fading and fading, until only a green shimmer swirled in the air like a meteor.

"Ahh

In the next second, the shimmer of light spread out in all directions, turning into a large green fine grid, "whooshing" towards Koster. Kerst unconsciously closed his eyes, and when he opened them again, he found himself in a strange place again.

In the Tower of Courage, there is an endless amount of water at his feet, and in the Tower of Wisdom, there are green grids at his feet.

"What does this mean?" Kerst didn't understand, what the green grid was for, what it meant, and there was no hint at all.

"One, two, three, four, five......" Kerst slowly counted over, and found that the grid under his feet had eighteen rows horizontally and vertically, a total of three hundred and sixty small grids. Just as he was counting, he noticed that some of the squares were starting to light up.

"Huh", as if aware of this, looked intently, and indeed some of the grids would be lit up by a green glow.

The way those green grids are lit up is a bit peculiar, one will be a few horizontal rows, and the other will be a few vertical rows, and there is no pattern at all. Koster sat down cross-legged, his mind quickly recalling the way and pattern of the green grid flickering. After looking at it for a long time, Kerst noticed that the timing of these grids lighting up seemed to be cyclical. After every 10 rounds, the lights of the green grids will return to the original order.

"Could it be that these are the ciphers that represent meaning?" said Koster, suddenly recalling the cryptography mentioned in the knowledge that Mousse had taught him, that is, in "The Trick of Strategy".

Cryptography is a rarity on this continent. During the Magic Empire's time, many of the letters and messages used by magicians were recorded in magic, making it difficult for ordinary people to decipher. Each mage has his own unique mark, and even the same mage has no way to crack the requested information.

After the collapse of the Magic Empire, the subsequent human kingdoms still did not have the custom of using passwords. For example, San Jose, due to the presence of court magicians, their secret messages are often transmitted safely through the magician's magic. The Desik Empire trusted his soldiers more, and the Wasteland Warriors were tasked with delivering a large number of secret documents. As for the countries of the business alliance, they use a different way - flamingos. This large bird, which flies at high altitudes, is quite safe most of the time. They lack natural predators and are less vulnerable, so most of the time they can ensure the safety of secret documents.

But in the technique of tautonomy that Koster studied, he mentions a secure way of passing that can be used by everyone, which is called cryptography in the book.

There are many types of cryptography, and in general, it is the use of some special ways to hide the information that needs to be conveyed in the ordinary content. When outsiders see it, they think it's just useless information. Only those who know the password well will find useful information hidden under ordinary information through special means.

Now, the beating of the squares in front of Koster reminded him of a logical approach in cryptography.

"Oh, if only I had pen and paper, I'd like to record it," said Koster, who was surprised to find a quill, ink, and a large stack of parchment in his hand.

"Aha", a surprised Kerst left and crouched, drawing on the parchment the pattern of the green grid each time.

Round 1: 1st in the first row, 3rd and 5th in the 2nd row, 18th in the 3rd row, and 18th in the 4th row......

Round 2: 7th in the first row, 1st and 9th in the 2nd row, 3rd in the third row......

There were so many green grids that Kerst felt like a long time had passed, and he had finally recorded the changes in each of the ten rounds. Seeing the familiar "first in the first row, three and five in the second row, eighteen in the third row, and ...... in the fourth row", he breathed a sigh of relief.

Once the records are complete, the next task is to crack the passwords. Normal cryptography should have a password dictionary, and no matter how it is cracked, the final answer must be to go to the password dictionary to find it. Kerst looked at the characters recorded in his hand dumbfoundedly, not knowing what to do next.

"Hey, Tary, there's no code dictionary here, how can I continue!" Kerst couldn't help but shout into the void, he knew that the Tarling named Otilia must be watching him from somewhere he didn't know, "Hint!"

In fact, Koster was just complaining in his heart, he was just asking casually, and he didn't intend to get any results. He just didn't want to fight, and as soon as he finished speaking, suddenly his mind thought of the glowing runes on the walls he had seen when he had just stepped into the Tower of Wisdom.

"No!" Kerst just thought about it, and noticed that the green grid around him began to fade away, and the real scene of the Tower of Wisdom appeared around him. Kerst knew that his guess should be correct, since the green grid had disappeared, it meant that its mission had been completed, which meant that the "passwords" he had recorded should be fine.

Kist stood up, walked over to the runes around the tower, and began to calculate. That's right, there are only eighteen rows of runes around the tower, and according to the "password" data recorded by Koster, he drew all the runes in the corresponding positions, and finally formed a long set of rune data.

At this time, Kist was dumbfounded, he couldn't understand what these runes meant, so he had to turn his gaze for help to the sky again, "Hey, Taling, isn't it almost, come out and tell me what to do next!"

"Isn't it the right way to crack it yourself, these runes don't have a special meaning. But that's not right, even if there is, I can't understand it. So what should I do next, do I really want to pronounce these runes?" Caster's mind kept spinning, and there was no good way to do it.

Time passed minute by minute, and inside the Tower of Wisdom, Kerst could not feel the change in time, but Feida outside the tower was extremely anxious. This time the test seemed to be much longer than the previous time at the Tower of Courage, which made Feida feel a little uneasy.

"Woo!" Kaka's familiar cry sounded in the sky above, and he didn't know what Kaka had flown back to the tower where the Great Elder was. "Kaka", Feida exclaimed in surprise and beckoned to him. Feida couldn't wait any longer, and when Kaka fell, she jumped on Kaka's back.

"Let's go, Kaka go to the tower to the southeast!" Kaka gave a sign on his back, and Kaka spread his wings and flew with Feida to the Tower of Wisdom in the southeast direction.

However, just after flying a little distance, the huge body of the Great Elder of the Dragon Clan, out of nowhere, blocked in front of Feida.

"Kaka, don't mess around!" the Great Elder of the Dragon Clan said gently, "Miss Feida, don't worry, the trial of Kerst is not over yet, please wait in peace." ”

"But, Great Elder, it's been a long time!" said Feida.

"Hehehe, the trial of the Tower of Wisdom, the test of wisdom, it will always take more time. As I have already said, trials are magical trials that mainly test people's hearts and wisdom, and there is no danger to their lives. ”

Feida sat on Kaka's back and didn't want to leave, hovering in the air and watching there anxiously.

In the trial, Koster looked helplessly at the long list of runes in his hand, not knowing what to do. "Why didn't you give any hints this time!" Kerst was a little depressed in his heart.