"It's very simple, first of all, Erebo's secret door must have been built according to the height of the dwarves, so the height of the secret door must not exceed the height of the dwarves too much, and it may even be built according to the standard height of the dwarven house!"

“……”

Seymour and Bilbo looked at each other and nodded in unison.

"Makes sense, you go on!"

"Then there is the keyhole, according to my understanding of the dwarves, there are only two possibilities for the location of the secret door keyhole, one is embedded in the secret door, and the other is placed next to the secret door, but no matter which one, the position of the keyhole cannot exceed the height of the secret door, and it will not even exceed 70% of the height of the secret door, just by virtue of this, all the space above the mountain wall of 1.2 meters can be excluded."

Seymour and Bilbo were stunned when they heard this, and hurriedly looked at the mountain wall in front of them, and found that after excluding the space of more than 1.2 meters, the originally wide mountain wall suddenly became narrow, and there seemed to be not much space left to carry the secret door.

Seymour and Bilbo couldn't help but look at each other in surprise and hurriedly spoke.

"Master, and then?"

"Then there are some more subjective inferences.,With the arrogant character of the king of the mountain.,When picking the lock, you will never allow yourself to step on or bend over.,If this inference is true,Then the space below 0.6 meters should also be excluded......"

Seymour and Bilbo once again removed the space below 0.6 meters from their minds, and the wide mountain wall in front of them suddenly left a rectangle about half a meter wide.

"So the keyhole must be in this area......"

"That's right, and I'm more of a central location, especially where you can get sunlight."

Seymour was shocked when he heard this, and quickly looked up to observe the position of the sunlight and shadows, and once again removed the corners in his mind where the light could not reach.

"There's less space left that way!"

Bilbo had a look of surprise on his face.

Lin Yi's slightly smiling voice came from the silver mangcard.

"Okay Seymour, that's probably all I can help you, the rest depends on you and your Fire Dragon Sword, believe me, the faint hidden magic that can be triggered by the sun will definitely not be the opponent of the Fire Dragon Sword, try it yourself!"

After speaking, Lin Yi chuckled lightly and hung up the communication.

Seymour carefully put away the card.

Bilbo on the side took a step back, comparing the imaginary map in his mind with the mountain wall in front of him, and his expression couldn't help but reveal a trace of sincere admiration.

"Your Excellency Lin Yi is really a great wise man."

"Of course!"

Seymour had a look of pride on his face, then pulled out the dragon sword from his waist and began to strike the mountain wall in front of him from the edge.

As for Thorin's map, and the group of them who had worked hard to decipher the text of the moon, Seymour and Bilbo had long since left behind.

In the case of being able to steal chickens, who would bother to go through the normal process?

Soon, Seymour knocked on something unusual.

When the sharp blade struck about three feet from the ground, a slight burst of fire suddenly appeared, and an undetectable magical light flashed from the place where it was struck.

Seymour was slightly stunned, and suddenly his heart was overjoyed, and he hurriedly slashed down towards that place with all his strength.

"Qiang—"

A crisp sword roar sounded, and a thin rock was cut in half by Seymour, falling to the ground with a puff of stone dust and dust, revealing a small black hole.

"It really works!"

Bilbo jumped for joy.

"Quick! Fast! Key! ”

Without hesitation, Seymour took out the key and stuffed it into the small hole in front of him.

Then twist it slightly.

Click-click-

A loud sound sounded, and a crack in the tight door about five feet high and three feet wide suddenly appeared on the tightly closed mountain wall, which was exactly the standard height of the gate of the dwarf house, which was not far from Lin Yi's guess.

Seymour leaned down and, together with Bilbo, pushed open the stone door.

The heavy stone door opened and closed slowly and silently, revealing a deep, dark cavern.

Seymour and Bilbo looked at each other, then took out a smaller flashlight from his bosom, turned the light to the faintest level, and entered the secret passage with Bilbo under the white light.

Of course, Seymour was hunched over, after all, the passage was a little too short for him.

Fortunately, this is not a half-orc cave, but a secret passage built by the dwarves of Erebo in their heyday, and its ground is very flat, the walls and ceiling are smooth, and the direction of the passage is as straight as if it had been measured with a ruler.

This also made Seymour not so uncomfortable after all.

Shortly after the two entered the secret passage, the sun finally set.

"Chirp!"

A thrush landed on the gray-black rock next to the secret door, and let out a joyful cry representing the harvest, and just as it habitually used the rock to beat the hard shell of the dinner snail, it suddenly found that the stone door on the mountain wall was actually open!

Seeing the passage of the black hole, the thrush's beating motion suddenly froze.

After a long time, it tilted its head: "Chirp?? ”

……

……

On the other side, Lin Yi hung up Seymour's communication.

Gandalf on the side looked at Lin Yi with some surprise, and his expression seemed to be a little impressed.

"Your Excellency Lin Yi is indeed an existence with both strength and wisdom, and he actually deduced the approximate location of the keyhole just by relying on the habits of the dwarves and the character of the king of the mountain."

"It's nothing, it's just a basic operation!" Lin Yi waved his hand indifferently, "Besides, I'm just guessing, but if the facts deviate from my speculation a little, Fang Cai's words will be useless." ”

“…… You are humble! ”

Gandalf tugged at the corners of his mouth and said stiffly.

He could see that Lin Yi was just very modest in his words, but in fact, his judgment of himself was very sure in his expression, so he almost engraved the words 'Lao Tzu said the truth' on his face.

Of course he is telling the truth!

I've read the script, can it still be fake?

Lin Yi had a smile on his face, glanced at Gandalf and said casually: "Old Gan, I just used the concept of sets in statistics, if you are interested, I can tell you a little bit about it......"

"Oh?"

Gandalf had a hint of interest on his face.

Lin Yi suddenly laughed: "It seems that you are indeed interested, that's great, I can also tell you about differential calculus, fractional calculus, vector algebra and spatial analytic geometry by the way......

As Lin Yi chattered on and on, Gandalf leaned over with interest, unaware of the complex math that awaited him...... Oh no, the world of mathematics.

Lin Yi was naturally happy to see this, he had just been admitted to Columbia University in New York before coming to Middle-earth, and by the way, he also took time to review the university courses, which was the most knowledgeable period in the life of the average college student, and he was very willing to share these wonderful things with the wise people of the other world.

The little black cat on the side naturally couldn't stand this.

As soon as Lin Yi spoke, it hurriedly stretched out its black wings, and in an instant, it crossed a distance of nearly 100 meters and landed on the top of the head of the war giant wolf at the front.

That's right, their current team is very large, with a length of two or three hundred meters in front and back.

These include 96 gigantic war wolves, 16 tall, muscular, black nightmare horses with fangs and teeth, and 8 rock trolls over 6 meters tall and resembling a mountain of meat.

All the dark creatures that have been transformed are the little brothers that the little black cat brought with its seven war wolves around Dogurdu when Lin Yi opened up the 'Dogurdu'.

To be honest, before accepting the first little brother, Lin Yi had never seen the little black cat so concerned about one thing.

Even if it is not as active as sleeping and eating, it is not as active as receiving the little brother, if it is not for the fact that the karmic reserves are really exhausted, the little black cat may still be happy to accept the little brother now.

By the way, among the newly recruited younger brothers, the War Wolf was classified into the [Wolf Warrior Legion], the Black Nightmare Pony was somewhat unexpectedly classified into the [War Horse Minions], and the Rock Trolls were classified into a new legion [Troll Legion].

All legions and minions without exception have 15 Strength and 15 Constitution.

In addition, Lin Yi also unexpectedly discovered that when the number of the same type of legion reaches 10 or more, it will activate something similar to the legion buff.

[Wolf Warrior Legion] is "Fangs and Claws", with +1 sharpness of minions and +5 strength and constitution.

[Warhorse Minions] is "Fast as the Wind" with +50% movement speed.

[Troll Legion] is "Thick Skin", Constitution +10, Defense +50%.

Among them, the War Wolf activates the buff again when the number reaches 50, and it should be activated again when the number reaches 100.

However, when 50 horses are stimulated, it is also "fangs and claws", but on the basis of 10 horses, another layer is superimposed, 100 words...... Maybe there will be some differences.

As the team grew bigger and bigger, Lin Yiben was a little worried about the placement of these legions.

It wasn't until he unexpectedly discovered that there was an option called "Gather the Legion" on the legion panel, with a long explanation attached to it.

Roughly speaking, users can use this button to summon their own legions across the same world, or even different worlds, no matter where they are.

However, this option has a cooldown time, which costs 48 hours each time it is used.

And if you cross different worlds, there is also a limit to the number of summons.

At present, Lin Yi can only summon 100 legion members at a time, and if he wants to bring all these little brothers back to the Marvel world, he will summon them in batches and multiple times......

Of course, Lin Yi didn't want to worry about this kind of thing for the time being.

First, he didn't know how many little brothers the little black cat would accept when he returned, and secondly, he ...... After being slowed down by the long queue, Lin Yi and his party finally arrived at their destination-

Moria!