On the Taizi Star, there is a small plateau, and there are several large mountains on the plateau, among which there is a not very high titanium mountain, and its summit is flat.

That's because of an ancient volcanic eruption, and the top of the mountain was cut off.

To the east of this flat-topped mountain, the terrain gradually becomes low-lying, and about a hundred kilometers away, there is Shitie Mountain, on which there is an altar of the iron man.

Beneath the hill is an abandoned mine, which was a very important base for titanium ore hundreds of years ago.

This once-forgotten underground space is now alive again, with the roar of large construction equipment and giant forklifts, loaders, rock drills, and transporters shuttling back and forth.

Some of these devices are controlled by computer humans, while others are automated and do not need to be controlled.

Many computer people are also busy inside, some are cleaning debris, some are laying lines, decorating walls; Everything is in order, busy but not chaotic.

There are also quite a few computer people patrolling with guns or standing guard in important positions.

King Ruger has been here with a computer man for more than a month, and this is the place he personally chose, hidden and spacious.

This huge underground kingdom, after blasting and digging, continues to expand into the surrounding and deep underground, and has begun to take shape, which can accommodate tens of thousands of people to train and live, and there are also several spacious warehouses.

There are weapons and ammunition, daily necessities, unmanned flying cars, and even ten small unmanned aircraft that were ensnared by the troops.

On this day, an unmanned rock drill was working underground, 10,000 meters from the entrance above, and the chiseled rock was constantly splashed with the sound of clanging sparks flying around.

"Click, click," there were a few loud noises, and the rock under his feet suddenly cracked like a crab's claw, and the rock drill tumbled and fell, and then with a "poof", there was no shadow.

Hearing the report, King Ruge rushed with his men.

With the light of the searchlight to the depths, everyone can see that the turbulent water can be seen more than ten meters below the ground, and the sound of the water flow is heard from time to time, as well as the cold air, this is an underground dark river.

There is a dark river, what to do? King Ruger consulted with several wise men.

Everyone expressed their opinions, and some people felt that it would not be in the way anyway.

Some people think that they shouldn't touch it, maybe there will be some underground gods in the river, and once disturbed, it will cause unnecessary trouble.

Tianlong felt that he should figure it out, because the source and direction of the river, the speed and depth of the water flow, would have an impact on the underground kingdom, and this was a long-term plan, and it could not be sloppy.

King Luge agreed with the Celestial Dragon, and decided to lead an expedition team to explore the current to see where it came from and where it was going.

After a little preparation, Tianlong set off with 20 computer people in five rubber boats, each equipped with the necessary equipment, including four searchlights, which shone all around.

Following the direction of the hand-held navigator, they set off towards the east and down the river.

The underground river rushes down the terrain, sometimes wide and calm, sometimes narrow and turbulent, even under the calm water, it is often full of whirlpools and undercurrents; And the direction is uncertain, and there are many branches, which often make them dizzy.

They only followed the main channel, trying to avoid the turbulent reefs and whirlpools.

But the accident still happened, there was a waterfall in front of me, but it was not visible from a distance, and when I came closer, it was too late to react.

With a "bang", several rubber boats rushed along the waterfall to a small lake dozens of meters deep.

A rubber boat crashed into several protruding reefs in mid-air, and the people and the boat were shattered.

The others were okay and landed safely on the lake, and the computer people were not injured because they were equipped with waterproof suits and life jackets, so they packed up their bags and equipment and continued to set off.

During the drive, a rubber boat seemed to hit something, and several round things appeared in front of me, constantly moving, shaped like a small hill,

Suddenly, a big mouth stretched out from the water, two abrupt big eyes glowing green, a big mouth full of sharp teeth bit towards the rubber boat, a big mouth fork, a thin neck, this guy looks close to the appearance of a water turtle, but the appearance is too vicious.

Tianlong immediately gave the order to fire, and in the dark night, more than a dozen guns burst out at the same time, but the hard shell of the big turtle didn't seem to be afraid of bullets, and still gathered towards them.

"With a flamethrower," Tenryu shouted.

In an instant, seven or eight flames erupted towards the big turtles, which seemed to work, and the big turtles swung their heads and swam away.

None of the computer people were injured, except that a rubber boat was bitten out of a big hole by a large turtle and could not move on, it was abandoned, and the people on it were scattered to other boats.

Passing through a reef-crisscrossed shoal, there was a long, narrow cave in front of it, and the low top wall was full of strange rocks, sharp as knives and axes, and the water rushed through the cave.

The water in the cave is extremely fast, and it is constantly turning and turning, spinning from side to side, and it is difficult for the rubber boat to maintain balance and direction, constantly hitting and rubbing back and forth against the walls on both sides.

The occupants of the boat leaned down, their heads down, carefully dodging the sharp rocks overhead, and carefully controlling the direction to avoid any further punctures or damage.

Out of the narrow passage, and then slid down a small waterfall, and then, they came to a labyrinthine place, this is a stone forest, standing many thick brown stone pillars, the stone pillars are dozens of meters short, hundreds of meters high, straight to the top of the cave.

In the middle of the stone pillars were winding passages, in which the water seemed to suddenly lose its direction and dispersed, some flowing in all directions along the passage, and some burrowing into the ground through the whirlpool.

The computer people were also confused, not knowing where to go, Tenryu decided to go with the flow, they found the largest current, three rubber boats lined up, speeding down the water, through the extremely complicated waterway, they rushed out of the cave, into the outside world.

Following the meandering river, they came to a reservoir.

"We're finally out of the Dark River." The computer people cheered.

It's the middle of the night, and they've been floating in the dark river all day.

Looking at the map, Tianlong carefully discerned the surrounding landscape and direction, and he understood that this was the vicinity of the village of the great chieftain Yi'an, and the downstream of this reservoir was the small river at the edge of the village.

The stone pillar of the stone forest that I passed by just now was directly below the altar of Shitie Mountain.

Returning to the Underground Kingdom, Celestial Dragon reported the entire process of the Dark River expedition to King Luge.

King Ruge gritted his teeth and said, "Great, Tianlong, your discovery is too important, our chance has come." ”

"What chance?" Tianlong asked puzzled.

"A chance for revenge, Draco! We've failed several times, and I've been locked up for decades, so it's time for Ian to taste the failures too. ”