There are those 30 Murphy Stones in the "Undersea Maze" waiting for him to collect.

And this purple accessory "Gilded Tail Spray" just happens to fit Er Dan's train perfectly, aligning with his plans!

Similar to "Nitrogen Tail Spray", it's used to accelerate the train, but the accessory effect also has another benefit; the fewer carriages and lighter the weight, the faster the speed increases, perfectly fitting his idea of a small and exquisite exploration train.

He actually treats Er Dan somewhat like a "Destroyer" in a carrier group.

In his vision.

The future Constant Star Train will be the main, with many such subsidiary trains executing his commands. At the start phase, all his tasks are basically single-threaded, but with the development of his power, surely in the future, multi-threaded progress will be required, with numerous tasks for him to handle simultaneously.

If he keeps controlling the Constant Star Train by himself every time, he'll be overwhelmed to death.

As for that "Universal Key"...

"..."

Chen Mang's expression turned slightly odd; he had never seen such a bizarre special tool. He genuinely had no idea which train could make use of this tool; one could say it has no use whatsoever!

-

"Special Tool": Universal Key.

"Item Effect": Can unlock anything labeled with a '?'; after each use, it enters a 30-second cooldown.

-

With this effect, he truly couldn't fathom any train that could utilize it.

Before the train changes its role, one of the buildable accessories doesn't display a name. After the train transitions, this accessory automatically becomes the corresponding level's heavy firepower weapon accessory, but back then the name was "Unknown Accessory", not "?".

Which means——

If a train develops normally, it won't use this special tool in its lifetime, completely useless.

But...

He happens to have a use for it.

Chen Mang's expression turned slightly odd, looking at the terminal with the button labeled "?", he lightly touched the key to the button.

In the next moment!

This "?" button had been with him since his train upgraded to Level 6. When the key emitted a burst of white light, the "?" on the button started to slowly disappear, transforming into three large characters!

"Military Factory".

"..."

After Chen Mang pressed the "Military Factory" button, he glanced at the screen on the terminal panel, slightly stunned. Then, a trace of disbelief flickered in his eyes; he looked at the key in his hand and couldn't help but kiss it, laughing and cursing.

"Damn, truly daddy's little treasure!"

He then carefully placed the key into the drawer.

He wasn't sure if he would encounter another existence labeled "?" in the future, but he was clear about one thing: anything marked with a question mark would definitely be good stuff!

-

"Military Factory".

"Can research, build, purchase various firepower or defense-related accessory blueprints."

"Area requirements are as follows..."

"Requires Train Assistance AI to be at least Level 10 or higher..."

"Each research, build, purchase requires consuming 'Merit Points', which can be exchanged through monster flesh."

-

What's the train most abundant in now?

Flesh!

And it's not enough, he's discarded a lot of lower-level monster flesh!

Immediately, Chen Mang couldn't bother with sleep, first situating the "Military Factory" in Ai's "Armor Research and Development Center", then had Biaozi and others carry a fridge, dumping all the monster flesh from the fridge into the furnace.

Then he controlled the Constant Star Train again to the slope below, retrieving the discarded monster flesh with a "Powerful Magnet".

Originally planned to leave the "Zombie Basin" as soon as possible, but now seems like doing some good deeds before departing would be better, helping clear out all the monsters in this region with the train.

Other regions don't have this many monsters.

The Kunlun Mountain region has high-level monsters, but in terms of numbers, it doesn't compare to the widespread Corpse Tide here, plus Kunlun Mountain has difficult terrain, with continuous mountain ranges.

Here is a basin, like a bowl.

Great!

Plentiful harvest this time!

There's also a lot of dropped items in the fridge waiting for him to inspect, fortifying his foundation.

...

Meanwhile, on the mountaintop.

Er Dan had already gathered all the people from Azure Dragon Train, standing on carriage tops, overseeing his 700-plus slaves, feeling a faint complex mood. From now on, these slaves are no longer part of Azure Dragon but belong to Constant Star.

He finally doesn't have to worry about the train's development.

Can fully devote himself to searching for Adventure Maps.

He can't imagine how relaxed and happy days like that would be, in the midst of Doomsday still able to do what he loves, it's a bit too luxurious, plus with Constant Star as a backing, no need to worry about train upgrade resources being insufficient, Constant Star will cover all.

It's just...

He feels a bit sorry for these slaves, like a company going bankrupt and dismissing employees.

"Exhale..."

After a brief silence, Er Dan stood on the carriage roof, looking at the slaves below, eyes slightly reddened, speaking hoarsely: "We've spent quite a long time together through these days, I believe I've treated you well among all the trains."

"Didn't let you go hungry, didn't let you be cold."

"But——"

"Today, I must part ways with everyone. Starting today, Azure Dragon Train is officially disbanded, and everyone will merge into Constant Star!"

"You will no longer be part of Azure Dragon; you will belong to Constant Star!"

If you find any errors ( broken links, non-standard content, etc.. ), Please let us know < report chapter > so we can fix it as soon as possible.