Inside the grotto, it was pitch black, a bit gloomy.

But everyone has a cultivation level, and they can see things without hindrance in the dark, and they can see the murals around the grotto at a glance.

The entire grotto is large and deep, with murals everywhere, stretching for miles.

And those murals are all figures, thousands of figures, all of which are mainly about fighting!

The place most of the murals describe is the battlefield!

Some battlefields are on plains, some are in valleys, some are on beaches, some are in swamps, and some are in rivers...

Most of the characters described in the murals are in the formation of troops, evolving formations in battle.

On the side of each mural, there are lines of small characters to comment on the content of the mural!

"This is... the Art of War?"

Lu Chen's eyes lit up when he saw the clues of the mural.

Not far away, Yu Li was holding a stack of parchment and a pen, trying to copy the mural.

"Boss, you are here!"

When Yu Li saw Lu Chen, he stopped writing and hurried up to greet him.

"Yu Li, are these murals good things?"

Lu Chen asked.

"Yes, the mural here is actually a powerful art of war. In addition to marching and fighting, there are many battle formations in it, which can increase the overall combat effectiveness!"

Yu Li said, "These battle formations are very suitable for our army. Once the army learns these battle formations, the overall combat effectiveness will definitely be greatly improved!"

"Is this art of war famous?"

Lu Chen asked again.

"Yes, it's called Liu Dao Art of War!"

Yu Li answered.

"Then how long have you been here, and how much content have you copied?"

"It's been ten hours, but I've only copied one percent."

"It's too slow. By the time you finish copying everything, the secret realm will be closed long ago."

"Then I can't help it. There are too many murals, too many characters, too many battle formations, too many colors, and they are very complicated. I can only copy them one by one, and I can't do it quickly."

Yu Li sighed, and said again, "I don't have enough time, so I can copy as much as I can. No matter what, it will be beneficial to the Legion."

"This Art of War is so powerful that it must be owned by our army. I don't want some of it, I want all of it!"

Lu Chen said.

"I want to, too, but I can't."

Yu Li said with a bitter face.

"You can write down all the murals without copying them, that would be much faster."

Lu Chen said.

"impossible!"

Yu Li shook his head resolutely, and said, "If I can memorize words, I can do it. Even if I can't, there are many brothers with strong memories in the Legion who can do it."

"However, these murals are too complicated, countless times the text!"

"It is not so difficult to memorize a mural completely. Even if someone can memorize it, it will take more time than copying it."

"Besides, this Art of War has a lot of content. It occupies most of the grotto. There are thousands of murals. How do you remember it?"

"Wanting to write down all the thousands of murals is harder than going to the sky, no one in the world can do it!"

Yu Li made such a conclusion, Lu Chen's face also darkened,

Lu Chen's memory is quite strong. After reading a book once, he can remember most of the content in the book, and after reading it twice, he can remember everything.

But ask him to memorize these murals...

To be honest, if you watch it a hundred times, you can only remember 20% of it!

The murals are not only complex, but also large in size, the smallest one is several feet high and one foot wide.

Not to mention the big ones, the largest one is ten feet wide and one hundred feet high...

What's more, there are thousands of murals here, ask him to memorize them all?

That is simply abuse!

It is impossible to remember it.

He suddenly realized that his proposal was simply a joke.

Because he overlooked one thing, that is, human memory has an upper limit!

To break through the upper limit of memory, a higher realm is necessary.

Obviously, everyone has not reached that level.

"How about this, don't copy it, learn the art of war in the murals now, and master it immediately."

Lu Chen had no choice but to say so.

In the entire army, only Yu Li was interested in arranging troops, and only Yu Li had the talent in this area. This work could only be done by Yu Li.

"Boss, I can't do it. The sum of all the murals is a book of war, and all of them are indispensable."

Yu Li shook his head again, and said, "Besides, this military book is so profound and difficult to understand, I have to study it slowly before I can remember it in my mind.

This process is time-consuming, slower than copying, and learning on the spot is unrealistic. When I finish learning, the secret realm will be closed long ago. "

"Then you can only learn some of the battle formations?"

Lu Chen asked.

"No, the art of war is coherent, and you must learn it from the beginning, and you cannot learn part of it from the middle."

Yu Li said.

"Forget it, let's follow what you said, as much as you can copy."

Seeing that neither this nor that would work, Lu Chen couldn't help being dejected and very helpless.

"Young master, Wan'er will help you write down the murals!"

Suddenly, Wan'er volunteered to stand up.

"Thousands of murals, can you remember them all?"

Lu Chen couldn't believe it.

"Wan'er can do it."

Wan'er nodded, and then explained, "The sacred wood technique Wan'er practiced not only enhances vitality, but also expands memory.

Now Wan'er has practiced the sacred wood sacred art on the seventh floor, with a strong memory and a large capacity, which can help the young master. "

"Then try it, remember as much as you can, don't force it."

Lu Shen said.

Afterwards, Wan'er secretly performed the divine wood sacred art, starting from the first mural, and memorized it while looking at it.

After a few glances, Wan'er finished the first picture, and then it was the second and third pictures...

The small murals are just a few glances, and the big murals are a few more glances. The speed is extremely fast.

An hour later, Wan'er had already reached the end of the grotto, and finished the last picture.

"Young master, all the murals are in Wan'er's mind."

Wan'er bounced up and ran to Lu Chen, pointed to her little head and said.

"So fast?"

Lu Chen was amazed, and the others were also in disbelief.

"Wan'er is stupid, otherwise it would be faster, at least half of the time will be saved!"

Wan'er pouted, but said so.

Can it be faster?

Wan'er's memory is really abnormal.

Therefore, everyone was stunned.

"How long will it take you to paint all the murals?"

Lu Chen calmed down and asked.

"About a month."

Wan'er thought for a while and said.

"too long!"

"Young master, do you want to use these murals urgently?"

"Yes, I need some battle formations now to enhance the overall combat power of the Zealot Legion."

As soon as Lu Chen finished speaking, Yu Li quickly followed up: "Boss, even if you give me the entire book of Six Paths of War, I still need a lot of time to study it before I can get it into my head."