“Energy capture device is being tested…”

“Preparing to release the capture net…”

Inside the research lab on Howling Isle.

A group of staff members in airtight protective suits were intently staring at a device inside the testing bay, about the size of a truck cab. Embedded in the center of the device were twenty core crystals obtained from the beast tide. As the chief engineer slowly pressed down on the operating lever, rings of azure light gradually rose from around the device!

After forming, these azure rings rapidly spread outward, bouncing off the special walls of the testing bay and turning into finer threads, before rebounding back.

Finally, with each bounce, these rings became a dense web, completely covering the entire testing bay.

“Prepare to release the first energy source!”

The chief engineer said in a deep voice, his finger slowly pressing down on a button on the nearby console marked “Vibration.” As he pressed down, the entire testing bay vibrated at a high frequency, emitting a sound similar to a “buzz.”

As the vibration appeared, the light web, which had been drifting aimlessly inside the testing bay, reacted like a venomous snake finding its prey, immediately contracting.

The web rapidly captured the energy generated by the vibration within the testing bay, then quickly fed it back into the truck cab-sized device.

At the same time, on an observation instrument on the console, the index representing energy data began to skyrocket.

“Vibration energy is being captured, the feedback rate is… 99.98%!”

A staff member responsible for observation looked at the index table and shouted excitedly, “Almost zero loss!”

“Success!”

“These crystals are usable!”

“Record the data immediately!”

Inside the research lab, many staff members were extremely excited. They used the crystals obtained from the beast tide to create a small energy capture device, the most important part of a planetary engine. If it could successfully complete the test, it would mean that these crystals sent by the Apostle of Howling Winds were completely flawless.

Yes, even though the data eye showed that the crystals had no abnormalities, Li Tianran did not choose to believe it directly. After all, this was something sent by his enemy, and it had to be strictly tested.

“Prepare to release the second energy source!” After a moment of silence, the chief engineer slowly pressed his finger on the second button on the console, marked “Thermal Energy.”

*Click!*

As the button was pressed, the vibration in the entire testing bay suddenly disappeared, replaced by intense heat of thousands of degrees!

As the high temperature rose, the web inside the testing bay once again captured and fed back the energy.

“High thermal energy is being captured, the feedback rate is… 97.78%!”

“Lower than the first energy source feedback!”

Two different data bars appeared on the display screen, the second one slightly shorter than the first, representing the corresponding energy capture feedback rates.

The energy feedback rate represents the basic working efficiency of a planetary engine.

Planetary engines can use the natural energy generated on Planet Blue to convert into their own energy, which naturally involves the issue of conversion rates. For example, a gust of wind, under human wind power stations, can only be converted into about a dozen percent of its energy, with the remaining eighty percent wasted. The converted energy can only supply electricity to a village.

But if it is absorbed by a planetary engine, its energy conversion rate can almost reach more than ninety percent, which can supply the consumption of a city!

Because there is more than one type of core crystal that makes up a planetary engine, although they have the same purpose, they are still somewhat different in certain aspects.

For example, depending on the type, these core crystals have different capture and feedback rates for different energies.

For example, the "Krypton Particle Crystal" in Li Tianran's mall has a very high capture and conversion rate for wind energy, but a relatively low conversion rate for vibration energy.

Another example is the "Jinluo Particle Crystal" in the Babel Tower ruins, which has a very high capture and conversion rate for vibration energy, but a very low conversion rate for thermal energy!

The combat advantages of different miracle buildings in different environments rely on the energy conversion rate inside the planetary engine.

Like the Babel Tower, it has a low thermal energy conversion rate, so it is naturally not suitable for combat near the Earth's core, lava, or volcanoes.

And the Four Seas Dragon King engine under Howling Isle will be useless once it leaves the sea.

Now, Li Tianran wants to test not only whether these crystals are flawed, but also which energy they have a higher capture and feedback rate for.

“Prepare to release the third energy…”

The chief engineer said softly, placing his finger on the third button, which was marked with the words “Pressure.”

As a special pressure was slowly released inside the testing bay, the light web flickered again, capturing the energy.

And this time, the data on the display screen reached 100%!

“Chief Engineer! I don’t think we need to continue testing!”

“We have found the natural energy best suited for this crystal!”

“It… its reaction to pressure energy reaches one hundred percent, it is a natural material for making submersible combat boats!”

Inside the research lab, there was a burst of cheers.