Mo Wuxie's divine thoughts were everywhere, but, to his disappointment, there was no trace of anyone here, and there was no trace of a corpse, let alone the smell of decay.

So where have these people and their eldest brother and sister-in-law gone?

He took a deep breath, the smell of metal in the air, and it only poured into his head.

Suddenly, he looked in one direction with a puzzled look, just now, there was a passage that he almost overlooked, that is, the passage to the underground, this passage was not artificial, but natural.

Passing one minecart after another, he walked to the end of a passage, and looked at the dark hole below, and smiled.

This vertical passage is indeed not excavated by absenteeism, but is naturally formed, with a depth of 10,000 meters, but there is a mystery at the bottom of the cave.

He landed on the ground and stomped hard, making a thump.

There's definitely room down there, and I'm standing on this compartment. It was pitch black, and he couldn't see his fingers, but it was like daylight to him.

He looked at the ground, which was a smooth slab of stone, which was at least half a meter thick.

The divine thought spread out again, piercing through the stone slab, and a look of surprise appeared in his eyes.

Underneath this is a natural and incomparably large underground space.

"Big brother and sister-in-law!" he was surprised, they were below, and the vanished absentees were also below. However, he was also worried that they were all under house arrest, and that there was no trace of the enemy, and that there was no one but them.

He stomped his foot violently, and there was a roar and buzzing, and he was literally almost deaf in his ears.

The slab was not only thick, but also extremely tough.

He looked at this stone slab carefully and exclaimed, "Nine Xuan True Iron, this is actually Xuan Tie!"

Xuantie, the full name of Jiuxuan True Iron, is the full name of the Martial Spirit Continent. It is the only material for forging divine weapons, and the material of his broken Ning Bi Sword is very little dark iron. So a little bit of dark iron can forge such a divine weapon, so how sharp should a divine weapon be if it is all made of dark iron?

He was thrilled, the weapon made of this material should barely be able to compete with the Sword of Destruction.

But he frowned again, the strength of this stone slab was not enough to cut it with his strength. Suddenly, it occurred to him that the black shadow in the mine should have appeared by opening this dark iron floor.

Thinking of this, his divine thoughts covered out again, and he was suddenly pleasantly surprised.

Dark iron is naturally formed, and people use special means to get this place, make it into a mechanism, and hold it up in key parts, and hold up this underground space.

What a big deal!" he sighed again. Without the support of this black iron, the hollowed out mine may collapse due to the uneven bearing force, filling the bottom flat, so the black iron plays a huge role.

The mechanism that the Xuaniron floor opens is inside the underground space, and it can only be opened from the inside, so if you want to go down from this position, someone must open it, obviously, no one opens it for him, so you can only enter by forcibly defeating the Xuaniron slab.

It's just that what makes him curious is that this stone slab seems to be the only passage to the underground space, so how did the people below leave the underground space?

He shook his head, no longer thinking nonsense, it was the right thing to go down first to rescue the eldest brother and sister-in-law and those absenteeism.

He thought for a moment and summoned the Four Friends of the Scattered Immortals.

"Wowhaha, are you going on a killing spree again?"

"Lao Tzu's flying sword is already hungry and thirsty, and he has long been eager to kill again!"

The scattered immortals began to talk and sing arrogantly again, and Mo Wuxian shouted, "Shut up!"

The four of them were silent for a moment, and then they looked at everything here, and one of them asked a normal question: "Master, you won't let us drink tea here, will you?"

Mo Wuxian nodded his feet and said, "Do you know this?"

The scattered immortals looked down, and they were all stunned for a moment, and then they were extremely excited.

"Wow, I'm rich, I'm really rich, this is ferro-molybdenum, haha, it's ferro-molybdenum!"

"Good thing, you can make immortal weapons!"

"You kid is a shit, molybdenum iron essence to build immortal weapons, are you a loser?"

"Okay, I have the most research on refining weapons, as far as I can see, this ferro-molybdenum precision is very high, and it is also naturally formed, if you refine it for me, it should be able to refine an ordinary artifact!"

"Can you really refine artifacts?"

"Of course, I'm a master of refining, but it's a pity that I haven't refined it for more than 10,000 years, and my technique is a little rusty!"

"Damn, how many artifacts can you refine in such a big piece, can you defeat that magic weapon?"

"I think it's Xuanhu, because the refining conditions of this material are too harsh, are you sure you can refine it?"

"Don't doubt my ability, you need to know that the magic weapon is incomplete, it hasn't reached the standard of a medium-grade artifact, it's an ordinary artifact at most, if I refine the artifact, hehe, I won't be afraid of that damn magic weapon anymore!"

"What's the nonsense then? Hurry up and collect the ferro-molybdenum essence!"

This guy showed a wry smile and said: "Ferro-molybdenum essence needs to be quenched with three flavors of true fire, and even if there is three flavors of true fire, it will take a month to melt it, and if you want to cut it, it will take even longer." ”

"Fuck, you mean it's going to take us a month to cut it down?"

"It's not like that, it's relatively simple to cut it, but it takes about fifteen days, and it's still the real fire that we release together!"

"What the hell are you still stunned about, hurry up!"

Mo Wuxian listened to what they said, his brows furrowed, and time was unbearable.

He thought of his flames and immediately released them, frightening the four of them to fly up collectively.

"What kind of fire is this?"

"What a powerful flame!"

"As a refining master, I can easily see that we have met the treasure this time, this is the six-flavor Xuanhuo, which is a grade higher than the three-flavor true fire, and if you think about it, the master alone can burn this piece of molybdenum iron essence!"

Hearing this, Mo Wuxian was overjoyed, and the raging fire suddenly became smaller, forming a circle, and fell on the Xuantie. The flame is not thin, but the temperature is high and frightening, just an hour, the black iron begins to turn red, melts after two hours, and three hours later, a round black iron block falls.

Mo Wuxie's eyes were quick, and he immediately put the Xuantie into the divine tomb, and then jumped down, and the scattered immortals followed closely, especially the scattered immortal who knew how to refine the artifact, there was a scorching light in his eyes, and he was planning to refine the artifact.

The underground space is very wide, and there is no echo when you speak.

Mo Wuxian quickly flew in one direction, and saw a stone prison, which was Mo Yan and Zhu Ying.

When Mo Yan saw Mo Wuxian coming, he was excited and shouted loudly: "Fifth brother, this way!"

Mo Wuxian came closer, and with a force of his wrist, he tore open the iron pillar of the stone prison and took them out.

Mo Yan stumbled under his feet and almost fell, but Mo Wuxian reached out and caught it.

Mo Wuxian showed an unhappy look, the eldest brother's physique was not even as good as Zhu Ying, this was because his cultivation was imprisoned.

"Big brother, what's going on here?"

Mo Yan clenched his fists and said, "This is a den of the Heaven and Earth Alliance! I was captured by them, I don't know why they didn't kill us!"