After the obsidian was inserted, the steel door did not react, and it did not move.

At this time, Bai Qingxue sent a message, and the mechanical knight suddenly stopped chasing her, and was rushing here.

"Damn, no, isn't the key really useless?" Shi Feng angrily punched the keyhole.

The easiest way to get in was not to get in, he had to use the more dangerous way to get in.

Didi ......

Suddenly, the keyhole of the steel gate emitted a dazzling golden light, and countless energy runes flashed on the two three-story high gates, and then slowly opened with a creaking and screeching sound.

Seeing that the mechanical knights had arrived, the gate had opened a gap for one person to enter and exit.

Shi Feng didn't say a word, pulled out the key, and the door stopped moving in an instant, and then slipped into the crack of the door.

System: Discover the steel-hulled fortress "Barutia".

The two-story tall mechanical knight tried to rush into the gate, but the crack was too narrow, and the gate was too big and heavy, so he could only bombard the gate outside, but it was useless.

"I've come in." After Shi Feng sent a message to Bai Qingxue, he cautiously walked along the huge steel passage.

The other side of the Fallen Lands.

"Light snow, how is he?" Zhao Yueru, who was waiting on the side, looked at Bai Qingxue who came and asked.

"It's okay, he's already in."

"But this mission is really dangerous, I just tested the strength of the mechanical knights a little, and found that these mechanical knights are completely different from other special elites, they can quickly resist my attacks, and launch a counterattack in an instant, if I don't react fast enough, I'm afraid I have been killed."

"If you don't have a combo that can deal a lot of damage, even kite flying won't be able to help these mechanical knights, and you'll put yourself in it." Bai Qingxue sat down, took out food and drink and began to recover, at this time she was still thinking about the battle scene just now in her mind, it was really thrilling, just the earth shock wave that was shattered by the spear made her lose more than two hundred health, if she was hit, the consequences would be unimaginable.

After Zhao Yueru heard it, she didn't know why, she seemed to be relieved.

"Okay, don't be in a daze, let's farm the birdman in the first-line sky, the drops and experience points here are very good, and we should be able to catch up with those top masters soon." After Bai Qingxue recovered, he stood up and commanded.

Inside the steel-hulled fortress, Shi Feng walked cautiously all the way, and the passage built of steel was rusty everywhere, flashing with sporadic lights, and he could barely see the road clearly.

After walking a long way, I found that there was no danger, only the occasional dripping sound could be heard, and the roar of machinery running, and most of the equipment could still operate as usual after a thousand years, which showed how high the technology of the dwarven civilization was.

After passing through the huge corridor, you will come to a huge furnace area, surrounded by steel walls connected by steel stairs, and beneath the burning furnace is a bottomless pool of water.

Instead of following the stairs to another exit, Shi Feng jumped down and into the pool.

Halfway through the fall, Shi Feng turned on the gravitational liberation, and his speed decreased sharply, falling slowly like a feather.

As he fell, Shi Feng suddenly saw a passage on the steel wall, barely able to accommodate the next person to enter and exit, and the information from the previous life did not mention it, so Shi Feng slowly floated over and landed right in the hidden passage.

"There is a treasure chest here, haven't those people found it in this life?" Shi Feng found that there was a large black iron box in the deepest part of the hidden passage, with many runes engraved on it, which was not easy to see.

After careful observation, Shi Feng judged that this was a Xuantie-level treasure chest, but Shi Feng did not rush over to open the treasure chest, but used the phantom kill to let the clone go over and take a look.

Just when the clone opened the treasure chest, countless arrows shot out around the iron wall, killing the clone in an instant, startling Shi Feng into a cold sweat, fortunately he developed the habit of being cautious in the Divine Domain, otherwise he would really be killed.

However, this kind of trap is scrapped after being used once, but Shi Feng is not in a hurry, the box will not run anyway, just wait until the phantom killing skill cools down, and use the clone to open the treasure chest.

This time, the doppelganger opened the treasure chest safely, and there was no danger, so Shi Feng walked over and took out the contents of the treasure chest.

A Blackstone Shield of Darkiron level, equipment requires 25 strength, equipment level 10, defense +69, defense rate 29%, strength +7, stamina +10, health +200, and all frontal damage taken after equipping is reduced by 10%. It is definitely the best shield of level 10.

There is also a book of mastery of the Darkiron level, which immediately increases 10 to 50 free mastery points after use, which is several times rarer than the Blackstone Shield, because these mastery points are permanent.

"Let's hope it's not too bad." Shi Feng prayed slightly, and clicked to use the Book of Mastery.

Then the system began to appear a bunch of numbers, ranging from 10 to 50, as long as Shi Feng shouted to stop, the last number that appeared was the mastery point he obtained, some like Russian roulette.

In the previous life, many masters collected various mastery books to improve weapon mastery, but the mastery books were too rare, and they couldn't be collected if they had money, so they were all used by themselves, after all, it was extremely difficult to increase a little more freedom and mastery.

Shi Feng had seen a lucky person who had obtained a book of mastery at the Adamantite level, and many people were envious when they saw it, and they were even willing to spend a million credits to buy it, but the person was unwilling, so he used it himself, and then the number was 30 to 200, he thought that this guy was super lucky, but in the end, he only got 31 points of free mastery, which made everyone laugh, and it was not as good as a book of Xuantie level mastery.

Seeing the numbers constantly turning, Shi Feng's heart was also beating wildly, and he didn't know how much he would follow.

"Stop!" Shi Feng shouted.

The number roulette wheel suddenly stopped, and Shi Feng opened his eyes to look over.

32 points.

A number that is not bad, so that you can get 32 free mastery points, which is equivalent to the free mastery points obtained by leveling up to level 20.

Shi Feng clicked on the one-handed sword mastery column.

Now the one-handed sword mastery is still 20 points, reaching the level of a beginner swordsman, and increasing the base damage by 10%.

With the addition of 8 points gained by reaching level 5 and the 5 points left, there are 13 points, and now with the addition of 32 points, there are a total of 45 free mastery points.

Shi Feng directly added another 30 points of mastery to the one-handed sword, and instantly the one-handed sword mastery was increased to the level of an intermediate swordsman, increasing the base damage by 15%, and there was still 50 points short of being raised to the advanced level.

Don't look at the increase in base damage by only 5%, these base damage will be amplified a lot after skill bonuses, the gap between the top masters and the masters, often because of the gap in base damage, so far I am afraid that only sporadic masters have reached the beginner's level, he can reach the intermediate level, and he is already a lot ahead.

Just as Shi Feng was about to go deeper, the siren of the fortress sounded.