Lucas directly gave the system fifty-one red insect shells.

On the bus panel, Lucas noticed that there were many green "+" signs added to the floor plan. He then saw that the red "+" sign behind the name "Level 1 Bus+" had turned green.

Since the bus's shell strength had reached level 2 after the previous upgrade, Lucas knew that once the power system reached level 2, the entire vehicle could be upgraded to level 2 as well.

Without hesitation, Lucas clicked on the green "+" sign. Even if it meant he couldn't add other functions after consumption, Lucas thought it was worth it.

It was common knowledge that higher-level items were generally better than lower-level ones.

After confirming, the floor plan of the bus began to refresh. It took a bit longer this time, with a bright white vertical line repeatedly scanning from the left side of the image to the right.

Finally, after three minutes, the entire image finished refreshing.

[Level 2 Bus]

Vehicle damage repaired 100%, shell strength increased by 1200% (red insect shells as the main material), engine power doubled, energy consumption reduced by 1000%, front end strength increased by 1500%, vehicle body gained camouflage function (changes with the environment), equipped with a cleaning function, and a silent system (upgradeable).

"No need to wash the car?"

Looking at the upgraded level 2 bus description, Lucas focused on the cleaning function.

He clicked directly on it and immediately opened the door and ran out.

As he looked at the bus, he saw the blood gradually sliding off the exterior shell, falling to the ground. The bus now looked completely refreshed.

Lucas was a little surprised, not by the cleaning function, but by the camouflage function.

Originally, there were still advertising patterns on the vehicle body, but now it had turned completely black.

It was not just ordinary black, but it blended with the surrounding environment under the cover of darkness.

Lucas deliberately walked a distance in one direction, periodically turning around to look at the bus.

As the distance increased, the bus became increasingly indistinct in Lucas's vision.

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At around a hundred meters away, he could hardly see the bus anymore.

The camouflage function truly surprised Lucas.

He initially thought the biggest drawback of the bus was its conspicuous size, making it an easy target.

Now, Lucas had fewer concerns in that regard.

Returning to the bus, Lucas carefully examined the other green "+" signs.

"+" sign [Kitchen Space*]

"+" sign [Bedroom Space*]

"+" sign [Treatment Chamber*]

Just like last time, the three items marked with "*" seemed more special.

Lucas speculated that they were related to spatial technology, so he didn't dare to click randomly.

He had a hunch that if he chose one of these three, all the values he had exchanged this time might be wiped out.

The system seemed to have a mischievous side, as it seemed to enjoy playing random games.

Lucas rarely received direct information about what he would get.

Therefore, every time he added something to the bus, Lucas had to think about whether adding a certain item would deplete all the exchanged values at once.

The key point was that the system didn't provide clear values; Lucas had to analyze them himself.

He continued to look at the other "+" signs.

"+" sign [Storage Room Partition]

"+" sign [Bedroom Partition]

"+" sign [Bathroom Partition]

"+" sign [Increase Vehicle Length by 1 meter]

"+" sign [Increase Vehicle Height by 10cm]

"+" sign [Increase Vehicle Width by 10cm]

Lucas glanced at them and realized that this category involved direct modifications to the interior space of the bus.

Apart from the length, width, and height modifications to the vehicle body, the other options seemed a bit underwhelming to Lucas.

Lucas continued to look.

"+" sign [Basic Combat Drone Control Console]

This one is more practical and one of the things Lucas wants the most.

Click to view detailed description.

[Basic Combat Drone Super Control Console]

It is divided into three modules, with three hangars included (upgradeable).

Combat Drone Module

This module includes mini cannons and mini missile systems on the drones. Maximum simultaneous control of 3 drones (upgradeable quantity).

Bombing Drone Module

This module includes drones with bomb deployment systems. Maximum simultaneous control of 3 drones (upgradeable quantity).

Kamikaze Drone Module

This module allows simultaneous control of a maximum of 3 drones (upgradeable quantity).

Note: The appearance and materials of all drone models can be designed using blank blueprints, with a minimum requirement of yellow-colored blueprints.

What a treasure!

After reading the introduction of the drone control console, Lucas immediately felt that this thing was great and seemed to have infinite possibilities.

He thought of the military's "Hive" drone swarm.

Lucas imagined thousands of kamikaze drones attacking hordes of zombies and insect swarms.

If it could be upgraded to carry something like a nuclear bomb, wouldn't it be invincible?

Moreover, he wouldn't need to expose himself and could stay far away.

At this moment, Lucas felt that adding this function was the most important thing for him.

The addition of spatial functions seemed useless to him at the moment; he hadn't reached the point of enjoying them yet.

Without further hesitation, Lucas quickly clicked on the green "+" sign.

Crash!

A pile of supplies behind the driver's seat collapsed.

Lucas looked over and saw a rectangular metal box on the vehicle wall, connected to the roof. It seemed to be a drone launching port on the roof.

Next to the metal box was a LCD panel.

The thin panel could be retracted into the vehicle wall, taking up little space.

In addition, there was a helmet hanging nearby, looking pretty cool.

Lucas walked over and cleaned up the supplies, then looked at the screen of the LCD panel.

The screen displayed all the structures and control keys for the three types of drone modules, but the hangar seemed to be empty.

After looking at the control panel, Lucas put on the helmet.

A first-person perspective appeared immediately.

This helmet should be used for precise operation of the drones, allowing the operator to directly enter the perspective of a single drone.

After the excitement faded, Lucas calmed down.

Currently, Lucas only had one yellow blueprint, so here's the problem.

If he chooses the first two types of drones, after drawing the drone models on the blueprint, he won't have blueprints for drawing ammunition.

For the third type, the kamikaze drone, Lucas only needs one yellow blueprint to have one.

However, the third type is a disposable item, and Lucas feels it would be a bit wasteful to choose it.

Currently, there doesn't seem to be a worthwhile target for using this kamikaze drone model.

At this moment, Lucas looked at the floor plan of the bus, and all the green "+" signs had turned gray.

The upgrade values for the bus, exchanged for fifty-one red insect shells, were gone just like that.

Lucas felt a little heartbroken.