Li Chen has already seen the power of the star destroyer carrier of alien civilization that Noah showed him.
Judging from the video I saw at the time, even a level 1.5 cosmic civilization.
After all the defenses were destroyed, there was no way to counter those Star Destroyers.
It can be seen how powerful their attack power is.
Li Chen doesn't think that the current star shelter can withstand such an attack.
But on the current earth, except for the star refuge.
I am afraid there is no place that can be called safer.
Except for the space shelters to which the shadow organizations in outer space belong.
Since the feasibility of escaping outside to avoid disaster is almost zero.
So what Li Chen can do is to improve the damage resistance of the star shelter as much as possible.
Only in this way.
He can guarantee it.
when encountering unforeseen circumstances.
When those aliens really broke the defense line of the shadow organization and invaded the earth in an all-round way.
Earth humans can still have a relatively safe shelter.
In other words, star shelters are the last line of defense for human beings.
Thinking of this, Li Chen directly opened the synthesis and conversion panel.
The familiar interface like a cauldron of refining medicine appears in front of you.
He directly searched and located it on the synthesis interface of [Star Shelter Upgrade and Enhance Blueprint].
The Lv1 upgrade blueprint can only strengthen the star shelter to five stars at most.
Further up, a higher level of enhanced blueprint is required.
That is Lv2's [Star Shelter Upgrade and Enhance Blueprint].
Synthesizing this requires five Lv1 blueprints.
And a single Lv1 blueprint needs to consume 5.5 trillion evolutionary energy and 10 million first-generation eighth-order energy crystal nuclei.
For the former Li Chen, this is a huge number.
But now this consumption is nothing more than a trivial matter.
Li Chen didn't even think about it, and synthesized five Lv1 [star shelter upgrade and strengthening blueprints] in one go.
"Let's try it first and see how the Lv2 blueprint works."
Although he trusts Noah, Li Chen has a habit.
If you are not sure about the specific effect, don't synthesize too much in advance.
Avoid wasting resources.
Consume five Lv enhanced blueprints to synthesize a Lv2 blueprint.
An additional 110 trillion evolutionary energy and 2 billion first-generation eighth-order energy crystal nuclei are required.
Compared with the blueprint of synthesizing Lv1, the consumption has doubled by twenty times.
At this point, Li Chen already felt a little pain in his flesh.
Now that's not a small amount.
But when you think about it, the star refuge is a place to save your life.
Comprehensively strengthening such a huge refuge only consumes such a small amount of resources.
Actually earned it.
Thinking of this, Li Chen felt a little more comfortable.
[Star Shelter Upgrade and Enhance Blueprint Lv2]
It can be used to upgrade the star shelter as a whole, or to strengthen it individually.
The currently applicable star-rated shelters range from 5-star to 7-star.
To enhance or upgrade star shelters with a level greater than 7 stars, you can use higher-level upgrade and enhancement blueprints to operate!
…
The Lv2 enhanced blueprint synthesized in front of him automatically displayed a detailed description.
After reading these descriptions, Li Chen was a little surprised.
Unexpectedly, this Lv2 blueprint can only strengthen or upgrade 5-star to 7-star shelters.
Wanting to strengthen to a higher level means that a higher level blueprint needs to be synthesized.
The synthesis of the five Lv1 blueprints cost a total of 2.75 trillion energy, plus 50 million first-generation eighth-order energy crystal nuclei.
The total synthesis cost of this Lv2 blueprint is not low...
If you need to synthesize a Lv3 evolution blueprint, in addition to the cost of five Lv2 blueprints.
That is, the 1.375 trillion evolutionary energy and the 2.050 billion energy crystal nuclei are multiplied by 5.
It will also consume an additional synthesis cost.
Although it is not known how much this consumption is, it is certain that it is definitely not low.
Then the total cost of a Lv3 blueprint may be tens of trillions in minutes.
"If you want the horse to be good, you must let the horse eat grass!"
After some calculations, Li Chen chose to continue strengthening and upgrading the star shelter without hesitation.
This is the last refuge of the human survivors on Earth.
If the star shelter is destroyed.
Humans are basically doomed.
【Ding! You are upgrading the star shelter! Are you sure to continue the upgrade? 】
[Once the upgrade operation is performed, it will be irreversible, and all consumption cannot be returned! 】
[All functions of the star shelter will be suspended during the upgrade process, and all automatic defense systems will temporarily fail, please pay attention! 】
【Upgrading in progress, please wait...】
…
Noah's familiar prompt sounded in his ears.
Immediately afterwards, Li Chen soon heard exclamations from all sides in the shelter.
Every time you upgrade, the star shelter will not only greatly increase the defense power, but also unlock some new functions.
At the same time, the area will become larger than before.
These changes can be clearly felt by everyone inside.
In addition, during the upgrade process, all functions of the star shelter will be suspended.
Suspension of energy supply, shutdown of defense systems and firepower systems, etc.
These movements can be felt immediately.
So it's normal to cause commotion.
It is Noah's business to appease the people's emotions and explain.
Taking advantage of the fact that the shelter was being upgraded, Li Chen synthesized two Lv2 upgrade blueprints in one go.
Lv2 drawings can only evolve star shelters to the highest eight stars.
Further up requires higher level blueprints.
Synthesizing those high-level blueprints requires more consumption.
Li Chen intends to see the specific upgrade effect first before making a decision.
After a while.
【Ding! The evolution of the star shelter is complete! 】
[The current level of the star shelter is six stars, and the protection level is increased to SS, and the following functions are unlocked: air circulation system]
…
Hearing Noah's notification tone, Li Chen suddenly became curious.
"Noah, what is this air circulation system?"
He will know that there is an air recirculation in the car.
But obviously, the so-called "air circulation" definitely does not refer to the air circulation of the car after upgrading to a six-star star shelter.
It should be a taller one.
And it has special functions...
[Answer the host, you can check the relevant introduction in the property panel of the shelter. 】
Noah's cold mechanical voice rang in his ears.
Li Chen was slightly taken aback.
Good guy!
This guy Noah has learned to be lazy now, right?
In desperation, he had no choice but to open the property panel of the star shelter to check it.
Li Chen was also very curious.
Upgraded from a five-star to a six-star shelter, what new changes have there been...