"Phew..."

After a long while, Chen Mang finally exhaled deeply and continued to control the train as it headed towards the towering mountain peak, now clearly visible to the naked eye.

Not bad.

Although he didn't find iron mines, sometimes you get what you weren't looking for. He ended up with a permanent goblin merchant.

He's planning to save those 100 Heritage Value points for now, as none of the four items available were particularly appealing.

Once the wedding for Mountain Cat is over and he earns another 500 Heritage Value points, he'll see what good items can be bought with 600 points.

Among those four items,

only one seemed rather unique to him.

"C-grade Difficulty Bypass Voucher."

With this item, he could unconditionally pass any C-grade difficulty task in adventure maps or quests, such as the job change task on the Mechanical Train or the maze task in the Undersea Maze.

The other items were average.

That Murphy Stone was even less useful to him. To be honest, he thought choosing the Murphy Stone was not as good as selecting the "C-grade Difficulty Bypass Voucher." After all, earlier this morning, while chatting with Er Dan, the Train Captain of the Azure Dragon Train, he mentioned that a successful pass through the C-grade maze task within the Undersea Maze adventure map could yield five Murphy Stones.

For the same price, purchasing Murphy Stones would only get him one.

Of course—

hidden maps like the Undersea Maze aren't easy to find. They are typically extremely concealed, and the approach is quite demanding. Er Dan, being rather generous, directly sent him the coordinates.

This kind of hidden map is usually only useful the first time for each person.

Er Dan had already visited once and found it useless now. If he gains the ability to have the train dive in the future, he might go check it out. The map is located under a lake in the Shahe Plain.

His Fixed Star Train currently doesn't have diving capabilities, but he may visit out of interest in the Undersea Maze when he can.

...

Half an hour later.

The Fixed Star Train finally arrived at the foot of the towering mountain peak, where from the Heaven-Reaching Tower one could see a faint silhouette of the mountain standing amid the clouds, akin to a delicate stroke in an ink painting, not very conspicuous at a distance.

It wasn't until one approached that the mountain's grandeur could truly be perceived!

Extremely slender.

The summit was only a few hundred meters wide. While this wouldn't be considered narrow on flat land, compared to the mountain's height, it appeared especially elongated.

He naturally also visited the Shahe City library.

This mountain didn't exist before Doomsday but emerged afterward.

"..."

Chen Mang leaned out of the sunroof, gazing upwards for a long time before finally sitting back at the control station, switching to spider legs and driving up the steep slope, a place perhaps only he could reach.

The mountain's sides were all extremely sheer cliffs.

There wasn't any path.

If the Rabbit Wheel were fully upgraded, it could reach about 3000 meters in flying height, unless someone used Murphy Stones to upgrade the Rabbit Wheel again, otherwise, it would be hard to reach this place.

The moment the mechanical spider legs touched the cliffs, they securely adhered, dragging the entire train upwards as if on flat ground.

"Spider legs" were merely a green component,

not very noticeable.

Yet they had been immensely helpful, as these mechanism green components allowed him to maximize their effects, a capability others would need 27 Murphy Stones to apply to a Spider Leg component.

Ascending continuously,

he controlled the speed, the ascent wasn't particularly fast; twenty minutes later,

the front spider legs of the Fixed Star Train finally landed on flat ground, and the entire train appeared atop the mountain.

The mountain top was an extremely vast and flat land, and before him was... a sprawling mining field.

"..."

Chen Mang jumped off the train, looking at the scene ahead, he smiled. Earlier, at the mountain's base, his scan detected mining fields atop the mountain, a total of five 2nd-level iron mines.

Moreover, they were all rich in ores.

He knew.

Such difficult-to-reach places generally either have hidden maps or dense resource mines.

These five 2nd-level iron mines could fully upgrade some of the train's components that are yet to be enhanced.

Generally speaking,

without using Murphy Stones, the "Resource Detection Radar," this green component, could only upgrade to level 3, or a 3000-meter detection range, but underground iron mines can be detected.

For example, by driving at a depth of 3000 meters underground with a drill, one could detect iron mines at a 6000-meter depth, though it would be inefficient with a lower speed underground.

Even the Doomsday Abyss canyon was once detected to have mines.

The Doomsday Abyss is 6000 meters deep, entirely unreachable by the Resource Detection Radar. Reportedly, two trains collaborated to find many steel ropes at a steel rope factory in Taiping City, thus securing one train head to another fully loaded train, lowering it slowly.

Through the lowered train head, they detected mines at the bottom of the Doomsday Abyss.

But that was the extent of it.

Descending further was deemed impossible; though 6000 meters might not sound significant, reviewing humanity's historical deep-down exploration attempts, it becomes clear how challenging reaching that 6000 meters deep canyon truly is.

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