Ice caves are completely natural. *Top* Points* .

In ancient times, the underground lakes were eroded to create space, and when the temperature and climate changed drastically, the underground lakes gradually dried up, and the water froze into ice, forming the current environment.

Mu Yun walked to a rock wall that had been torn out of a large piece: "The orc miners should have worked here. ”

Mu Ying'er bent down and picked up a small hoe, and said with a grin: "Young master, look, this is a pocket version of a small mining hoe? It's too small! It's about the size of my palm! How can it mine stones!"

"Energy in nature, if it is fused with a special substance in a specific environment, it will eventually be solidified crystals. The place where a large number of crystals are formed is crystal ore, and the difficulty of crystal mining is very high. ”

Mu Yun condensed his true qi into the palm of his hand, pierced a piece of tofu and pierced into the rock, digging a large piece of rock, the rock was densely packed and covered with shiny substances, the small ones were like mung beans, and the big ones were like peas, although the shape was not very regular, it was roughly close to a circle.

"Because, the stability of crystals is different, some crystals are very stable, and some crystals explode at the touch of a button. Sometimes the stability of the same crystal, in different positions, is also different. For example, the outer layer of the crystal, because it is often exposed to contact with matter in nature, is relatively inert, but the energy inside the crystal is still active. ”

The young master is very knowledgeable!

Mu Ying'er suddenly felt that her knowledge had increased.

"Extreme care must be taken when mining crystals, it is especially important to accurately measure the active state of crystals, miners' tools need to be specially made, they need to wear gloves made by soaking in inert potions, and the surface of the mining tools needs to be wrapped in a layer of dark gold, which is a very inert spell metal that does not easily react with crystals. ”

The little hoe was indeed plated with a dull layer of metal.

Mu Yun pulled out a pea-sized crystal: the color of the crystal was dark purple, very close to black, and there were a small number of magazines in it, and the purity was not particularly ideal.

Mu Yun held the crystal in the palm of his hand and silently recited a spell to test it, "91% of the dark energy components, 4% of the ice energy, 3% of the soul energy, 1% of the earth energy, and 1% of the miscellaneous energy. Dark energy accounts for the majority, and it is undoubtedly a dark crystal ore, which actually contains soul energy components, which is a little surprising, but it is a pity that the content is too low and there is no way to extract it. ”

Mu Ying'er asked curiously: "A spar contains so much energy, how do people use it?"

Mu Yun shook the pea-sized natural crystal in his hand: "The stability of natural crystals is different, the use process will be very dangerous, and it contains impurities, which will affect the success rate of the experiment when used in experiments." After this kind of spar is excavated, it is generally put into an inert potion and sealed, sent to the spar processing factory, purified and refined with instruments and magic circles, concentrated into pure crystals of standard units, and finally entered the market. ”

Natural crystals and processed crystals are not completely useless.

The energy absorption efficiency of natural crystals is extremely high, and when inerted and refined, it is much more stable, but the absorption rate is very low. Some experiments are conducted with high standards using only extremely high purity natural crystals. Mu Yun also needs a large number of natural crystals, and the efficiency is at least several times higher through the teleportation array created by Mu Yun to carry out sacrifices!

"In an environment full of dark crystals, light, thunder, and fire spells can no longer be used!"

"Ah, could it be that the light and thunder fire will cause a hedron reaction?"

"That's right, especially for light energy, in fact, when mining Dark Crystal, miners need to be equipped with night vision devices, and must not light torches or bring any light sources in. Dark energy is relatively inert energy, and physical collisions are not easy to cause loss of control, but if it is stimulated by light, it may cause a chain explosion!"

Mu Ying'er understands that to deal with the demon clan, the best power is light energy, and now the young master can't use light spells, if he encounters demons, he will definitely be restrained in fighting: "Then what theory is the best to use?"

"Among the elemental energy, the dark energy is naturally the best!"

Mu Ying'er was relieved.

Mu Yun stayed for a few minutes, changed some spell templates, and chose some spells that were more suitable for the environment, and then took Ying'er to continue exploring the cave. Not long after the few people advanced, the surroundings fell into darkness, and the dark crystal did not shine very brightly, so it was almost impossible to borrow the spar to illuminate.

Of course, the darkness can't trap the two, Mu Ying'er's special physique allows her to accurately find the embroidery needle that fell under the bed in an absolutely dark room, and Mu Yun can also have normal vision in the dark environment through blessing spells.

"I feel like the dark energy is getting stronger!"

Mu Ying'er is not what it used to be.

Otherwise, I wouldn't dare to walk in this environment.

"That's right, the deeper we go, the purer the ore becomes, and the strength increases significantly. ”

Mu Yun obviously underestimated the reserves of this crystal mine, as it continued to go deeper, the crystals contained in the rocks became larger and larger, some could even reach the size of eggs, and crystal shoots even grew in the rocks, the so-called crystal shoots are bamboo shoot-like crystals, just like the common bamboo shoots in the cave. Some of these crystal shoots are as high as more than a pool, and Mu Yun checked the energy in them, and the purity of dark energy was as high as 97%!

Energy purity of more than 90% is considered high-purity crystal ore!

The purity of the ore in this area is generally more than 95%, which can be called ultra-high purity crystal ore!

Mu Yun secretly rejoiced in his heart, it was really good, such a crystal mine was exactly what Mu Yun wanted. Mu Yun couldn't estimate the depth and specific content of the ore vein, but he felt that the value of billions of gold coins in the entire mine must be indispensable, and the crystal ore mining speed was very slow, and it would not be able to be dug up in forty or fifty years!

Mu Ying'er began to feel bored after the freshness passed: "The ghost place is like a labyrinth, why haven't the demons shown up yet?"

Mu Yun made a silent gesture: "They won't be able to run." ”

A gloomy laugh sounded in Mu Ying'er's ears, like a woman, in the dark space, it looked extremely terrifying.

"Young Master, did you see the voice?"

"Is there one?" Mu Yun released a detection spell: "There are no life fluctuations nearby!"

Mu Ying'er scratched her head: "Strange...... Obviously, I heard it, it can't be a delusion!"

Mu Yun didn't care too much, "Don't worry, let's keep going!"

Mu Ying'er's nerves gradually tensed, she would not have auditory hallucinations for no reason, just when Mu Ying'er was suspicious, the laughter appeared again, it was even stronger than just now, sometimes far and sometimes near, sometimes on the left, sometimes on the right, and suddenly turned to the back.

"It's out again! The demon is out!"

"Huh?!"

Mu Yun hurriedly stopped!

"It's still there!"

Mu Yun cast a life reconnaissance spell and did not find life fluctuations, when he saw Ying'er's firm expression, Mu Yun tentatively cast an undead reconnaissance spell, but did not find soul fire fluctuations, there was nothing nearby at all!

The young master doesn't feel it at all?

The sound still lingers in my ears, and sometimes it feels like it shakes the ground!

Mu Yun patted Ying'er on the shoulder and comforted: "Don't worry, I'll pull them out, let's keep walking!"

Mu Ying'er's palms were sweating!

The atmosphere of the whole cave is weird!

Impossible!

What's going on?

The sound came and went, but it never really disappeared!

As the exploration deepened, the voices gradually increased, from one to two or three, and finally there were at least dozens of people, men and women, old and young, and the laughter was different, revealing a strange atmosphere. Mu Ying'er's mind was full of terrible laughter, just laughing, laughing madly.

Mu Ying'er's face turned pale.

Try covering your ears with both hands.

It didn't work!

That oozing laughter couldn't be stopped!

Suddenly, a faint voice was mixed in: "Mu Ying'er, come on!"

Mu Ying'er seemed to be a cat whose tail had been guessed, and suddenly jumped up with a scream: "Young master, young master, someone is talking to me!"

Mu Yun's face was full of differences: "What's the matter?"

Mu Ying'er shook her head vigorously: "I don't know, it sounds like a middle-aged woman, she called out my name!"

There was darkness and silence, there was not a single ghost, where did the middle-aged woman come from? Moreover, this is a plateau area, and there are very few people who can speak the human language! Not to mention a middle-aged woman who knows Mu Ying'er!

"Mu Ying'er, join us!"

Mu Ying'er showed a frightened expression: "It's ...... again and again." It's there again, this time it's a man!"

Mu Yun held Mu Ying'er's hand, checked to make sure that Ying'er's body was normal, and there were no traces of excessive erosion of dark energy, he patted Ying'er on the shoulder and said, "It seems that there is indeed a problem here, but don't worry, there is me!"

Mu Ying'er swallowed a handful of saliva.

No matter!

It's just a sound, it's not a big deal!

It must be a demon who thinks he is cowardly and pretends to be a ghost to scare himself!

The demons are so hateful that they dare to scare me, am I really a bully! I must find them out with the young master, and then kill them all!

The idea is just emerging.

In Mu Ying'er's field of vision, a figure suddenly appeared, looking extremely ugly, with three heads, spitting out a scarlet tongue several feet long, green fangs, and the surface of the body, full of dense eyes, staring at Mu Ying'er.

"There it is!"

The heartbeat suddenly increased violently, and the energy was output several times!

"Hmph, look at my Demon God's hand!"

Mu Ying'er slammed out her right fist, black energy gushed out, and turned into a huge phantom fist, bombarding the monster heavily, and the powerful force was pressed against the monster, imprinted into the rock wall, blasting out a huge hole. Probably due to the violent impact, some of the crystals in the rock wall cracked, and a large amount of dark energy leaked out.

"I hit it!"

The phantom form arm quickly dissipated, and Ying'er shouted with excitement on her face, this trick was only recently learned by Ying'er, and her Demon God's Shadow didn't need to be summoned completely, and now she can do partial summoning, so it is more flexible to use.

"Young master, I'll kill it!"

Mu Yun was looking at her with an inexplicable gaze.

A punch to the rock wall for no reason?

Mu Ying'er has been very wrong since she first started, what the hell is going on?

Is there really an unknown creature using illusion on Ying'er? This is unlikely, because even if he wants to attack, it will be two people attacking together, and during the release of the spell, Mu Yun can feel the fluctuation of the spell 100%. And the spell must be cast within a certain range, and the radius of Muyun's detection spell is very large, and there are definitely no creatures nearby, not even undead.