Lin Xuan rushed to the furnace of the Lightning Tower.

The heat here soared, and the temperature was scorching.

More than ten low-level martial artists were shoveling coal here.

Although the Little Spirit Mountain was a large mystic realm, there were still many low-level martial artists.

Their jobs were basically in the fields of catering, odd jobs, and other services. Some were also in charge of forging and creating potions.

If they wanted to recruit high-level martial artists to do such a thing, he would have to spend essence instead of general coins.

The Construction Division could not afford it, so they simply recruited some low-level martial artists from outside.

At this moment, the eyes of these low-level martial artists were already red from the smell and tears fell randomly.

However, the coal supply was already empty.

“We’ve used up all the coal!”

“What should I do? The Lightning Tower still has more than 20% left before it gets fully charged. We won’t be able to make up for the difference at all!”

“Let’s run. In any case, we’re low-level martial artists. Even if the city wall is broken, it won’t be our fault.”

When Lin Xuan rushed here, a few low-level martial artists had already run away, leaving only a few anxious people pacing around.

Under their shocked gazes, Lin Xuan directly rushed to the furnace, picked up a blue item, and stuffed it in.

The martial artists shook their heads in despair.

“It’s useless. Other than coal, oil, and natural gas, only golden grade items produced by large mystic realms can be used as energy. We’ve already tried everything we had on us just now.” A Fourth Realm martial artist had a solemn expression. “I’ve thrown in a few pieces of my equipment, but there’s no reaction.”

Lin Xuan looked at him. “Are you a member of the Construction Division?”

“No.”

“Then why are you working so hard? You even threw in your equipment to see if it worked?”

The Fourth Realm martial artist sighed. “If the city wall is broken, a lot of ghosts will surge in and we definitely won’t be able to stop them. By then, as low-level martial artists, we will have no one to protect us.”

“Therefore, I’ve tried everything I had on me. After all, our fate is already sealed with the colony’s.”

Lin Xuan nodded. “You’re someone who can see things clearly.”

The low-level martial artists who had escaped and the high-level martial artists who had quietly retreated from the city wall were all short-sighted.

If the city wall was broken, the entire colony would be doomed.

The way to ensure that the city wall was not broken was to activate all the Lightning Towers!

Colony Three was dozens of kilometers away from Colony Two.

Very few Seventh Realm martial artists could escape to Colony Two at night under the attack of the ghosts.

“What did you throw in just now? Can it be used as energy?” the Fourth Realm martial artist asked.

Lin Xuan threw another High-Level Observer skill onto the Lightning Tower and nodded. “Not only can it be used as fuel, it can even speed up the charging process.”

The Thunder Rock Marrow actually provided 10% of the energy!

“Another one, directly fill it up!”

Lin Xuan threw another one in.

The next moment, the Lightning Tower suddenly let out a violent roar as if it was filled with energy.

The martial artists on the city wall looked up in shock and immediately shouted excitedly, “The Lightning Tower is fully charged!”

The person in charge of the east wall was also extremely surprised. “Well done! Everyone, rely on the Lightning Tower and beat down all the ghosts!”

The ghosts that rushed into the vicinity of the Lightning Tower and tried to self-destruct were electrocuted into smoke by the lightning of the Lightning Tower without even having the chance to self-destruct.

Wan Youxi’s design also allowed the Lightning Tower to filter humans on its own and only attack ghosts.

In this way, human martial artists could unite under the Lightning Tower and quickly obtain an advantage.

Boom! Boom! Boom!

A lightning chain landed, and a large number of ghosts were hit, their bodies frozen on the spot.

Seeing this, the martial artists took the opportunity to attack.

Even the martial artists who wanted to retreat rushed back when they saw this and hurriedly threw skills down the city.

Boom!

The Lightning Tower directly sent a super powerful lightning chain down the city wall. Half of the ghosts within a 50-meter radius were dead and the other half were severely injured!

The heavily injured ones also fell into a blinded state and were unable to counterattack. They quickly died under the various skills of the martial artists.

When the Fourth Realm martial artist heard the surprised shout on the city wall, he was also extremely surprised. “It actually worked?!”

He wanted to thank the young Seventh Realm martial artist, but he discovered that the other party had already disappeared.

Lin Xuan activated Lightning Wind and quickly rushed to the other two Lightning Towers. He did the same thing and threw the two Thunder Rock Marrow into the furnace.

These two Lightning Towers were also quickly filled with energy in an extremely short period of time.

Terrifying lightning surged crazily down the city!

The person in charge of the east wall was also somewhat stunned when he saw this sudden increase in power.

“Why is the power of this Lightning Tower even stronger than usual? How strange.”

At this moment, Lin Xuan had already invested the Thunder Rock Marrow into the three Lightning Towers on the east wall. Soon, he arrived in front of the person in charge of the east wall.

“Other than the east wall, were the other walls also attacked by the ghosts?”

The person in charge of the east wall shook his head. “I didn’t receive their request for help. Only our side should have been attacked like this.”

Only then was Lin Xuan relieved.

“Reinforcements are here!”

At this moment, the person-in-charge discovered that many martial artists were surging over from the other three walls.

The person in the lead was Old Wu, who had been in charge of registration at the entrance of the gathering place.

“We’re here! We’re not too late, right?! Eh?” Old Wu rushed up the city wall with a huge axe, but he was immediately shocked when he saw that the ghost tide had actually been repelled.

“Your Lightning Tower seems to have charged up very quickly… Did you rely on the Lightning Tower to send the ghosts back?” Old Wu put away his axe.

The person-in-charge nodded. “It’s all thanks to this martial artist with the code name Shield. I don’t know what golden grade item he took out and threw into the Lightning Tower furnace. However, after he threw his items in, the Lightning Tower sped up its charging. Thankfully, we were able to salvage the situation before the entire defensive line collapsed.”

Old Wu looked at Lin Xuan in surprise. “I remember you. You’re one of the few Old Li brought.”

Lin Xuan nodded.

“What golden grade item did you take out? Don’t worry, the Construction Division won’t forget your contributions. They will tabulate your battle merits tonight,” Old Wu said in relief.

“The Thunder Rock Marrow of the Falling Thunder Mountain.”

Lin Xuan did not want to hide it.

The news that the Falling Thunder Mountain had advanced to a large mystic realm had already spread throughout the entire Construction Division. The martial artists also knew about the items produced by the Falling Thunder Mountain.

“So it’s the Thunder Rock Marrow. No wonder! This thing is indeed very suitable to be used as fuel for the Lightning Tower.” Old Wu nodded repeatedly.

“It’s not just me. Some of the Thunder Rock Marrow was provided by my friends.” Lin Xuan pointed at Ye Yuqiu and the others who were still fighting the ghosts seriously on the city wall.

Old Wu laughed loudly. “Good! The people Old Li brought are indeed not bad! Don’t worry, I won’t forget your battle merits!”

He patted Lin Xuan’s shoulder in relief and turned around to patrol the other city walls.

The three Lightning Towers on the east wall immediately displayed extremely powerful lethality. The ghosts could not even get within ten meters of the city wall.

In the distance, the sutured ghost monster stared fiercely at the Lightning Tower and roared before disappearing into the darkness.

After it left, the combat strength of the ghosts decreased greatly.

Although they were still tirelessly attacking the city wall, they no longer had the high desire to fight.

An hour later, all the ghosts that had attacked Colony Three were destroyed.

All the martial artists heaved a sigh of relief.

They felt as if they had survived a calamity.

However, after the battle, the number of casualties made many people fall silent.

14 civilian martial artists died and 32 were seriously injured.

37 members of the Construction Division died and 11 were seriously injured.

These were all Seventh Realm martial artists!

In particular, the members of the Construction Division were all well-trained martial artists. However, in order to protect the Lightning Tower, many of them had died under the self-destruction of the ghosts.

After the battle ended, the person in charge of the east wall arranged for the members of the Construction Division to be on night duty. The other martial artists dragged their tired bodies back to their residences.

On the way back to his residence, Lin Xuan and the others accidentally checked their bracelets.

They discovered that their battle merits they accumulated in the Little Spirit Mountain had soared greatly.

Everyone obtained at least 2,000 battle merits.

Due to the shocking lethality of Flame Explosion, he even obtained 3,000 battle merits.

“The Thunder Rock Marrow is really good stuff. It’s too suitable to be used as fuel for the Lightning Tower. I reckon the Construction Division will increase the excavation of the Thunder Rock Marrow in the future,” Silver Fox said with a smile.

Everyone nodded.

At first, they only felt that the Thunder Rock Marrow was a life-saving trump card for mages who were good at lightning magic.

It was only when the person in charge spoke that they finally reacted.

Wasn’t the Thunder Rock Marrow a golden grade item with the lightning attribute?! It was the perfect fuel for the Lightning Tower!

“Everyone, rest. We still have to secretly investigate the abnormal situation in Colony Three tomorrow.” Ye Yuqiu greeted the others and entered her room.

Lin Xuan and the others also entered their rooms. They washed up and lay down to rest.

The night was long. Lin Xuan was not sleepy after experiencing a battle. He simply checked the situation in the underground cave through the perspective of the Little Rock Snake.

When he focused on the perspective of the Little Rock Snake, he was immediately stunned.

Damn, what the hell was this?!

The Little Rock Snake looked over. This gloomy underground space was actually filled with ghosts!

These ghosts had empty eyes and numb expressions. They floated on the spot in a daze and did not move at all.

However, the Little Rock Snake was not attacked by the ghosts.

Lin Xuan’s scalp turned numb.

Had he stirred up a ghost nest?

Were there really so many ghosts in Little Spirit Mountain?

Lin Xuan simply controlled the Little Rock Snake to crawl towards the ground.

First, he wanted to know how many thousands of ghosts were gathered in the underground cave.

The Little Rock Snake slithered towards the ground without stopping.

Along the way, they encountered fewer and fewer ghosts. In the end, they completely disappeared.

After more than two hours of snake travel, Lin Xuan finally saw the moonlight.

“At the speed of the Little Rock Snake… those ghosts are probably gathering at a depth of more than a thousand meters underground.”

“The closer we get to the ground, the fewer ghosts there are.”

“Does the Construction Division know about the existence of these ghosts? Or did they only appear recently? They should have only appeared recently. Otherwise, the Construction Division will definitely send experts to clean them up.”

The more Lin Xuan thought about it, the more he felt that something was wrong.

This Little Spirit Mountain was too strange.

The sky now darkened faster than before.

The ghosts also gained the ability to self-destruct.

Moreover, there was also a huge number of ghosts that were gathered 1,000 meters underground.

Finally, there was also a group of Indian martial artists and Indian spies infiltrating the Little Spirit Mountain and getting ready to cause destruction

With so many factors gathered together, Lin Xuan felt like something big was about to happen one day.

“Oh? Is that a human voice?” Lin Xuan suddenly heard someone speak through the perspective of the Little Rock Snake.

However, it did not sound like Chinese at all. Instead, it sounded like Hindi.