Due to the large number of cities, even if Lin Dong strictly followed his plan, he still need to spend 2 hours, consuming 25 rounds of main cannon ammunition, 70 rounds of secondary cannon ammunition, just to obtain 360 source points.

Main cannon ammunition: 80 rounds. Secondary cannon ammunition: 2,190 rounds. Remaining source points: 696.

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The extra 30 source points were due to the flood on the first habitable planet. The casualties were still increasing, so Lin Dong was obtaining source points from there.

At this time, the battleships in the Remu galaxy had already been mobilized and started to set up defenses on the 4 habitable planets.

When the first habitable planet was attacked, the Remu civilization did not discover Lin Dong and thought that it was an internal conflict. When the second habitable planet was attacked, the Remu civilization finally discovered Lin Dong's Thunder Flash.

However, it took time for the battleships to move and get into position.

Moreover, a rank 1 interstellar civilization battleship like the Remu civilization was only suitable for travelling in outer space. Once it was used in battle, it would instead display an abnormal performance and give Lin Dong a chance to attack.

They could only choose to set up a defensive perimeter as a passive response.

Lin Dong glanced at them and ignored them.

It would not be so easy for those battleships to surround his Thunder Flash. If they could quickly trap Lin Dong, it would not be a rank 1 civilization.

Lin Dong had already visited 3 of the 4 habitable planets in the Remu galaxy. The battleships had already set up their defense on the remaining planet.

However, the surface area of a single planet was massive. It was impossible for hundreds of battleships to cover the entire planet.

Lin Dong did not hesitate to rely on his speed and energy shield to directly charge through the defensive net. He descended on the last habitable planet and wreaked havoc on it.

The battleships could only watch from behind and did not dare to charge at Lin Dong.

There were only 2 super-large cities with a population of 100 million on the last planet. There were 5 cities with a population of 80 million. After spending 2 hours, Lin Don used 15 rounds of main cannon ammunition, 90 rounds of secondary cannon ammunition to obtain 433 source points.

Main cannon ammunition: 65 rounds. Secondary cannon ammunition: 2,100 rounds. Remaining source points: 1,129 points.

Lin Dong's first target had already been achieved.

However, he would not stop attacking them.

The Remu civilization's battleships had already set up defenses on the 4 habitable planets and had basically completed their preparations.

Although they had used all their strength, it was useless.

There were less than 700 battleships in each habitable planet. They could not stop Lin Dong's Thunder Flash. Lin Dong could leave the battlefield as he wished.

Lin Dong used his main cannon to open a path for him, while the secondary cannon was used to aid him. In 10 minutes, with the assistance of the optical computer and the detection radar, the main cannon destroyed 10 battleships, whereas the secondary cannons destroyed 35 battleships.

The extremely high hit rate brought Lin Dong even more benefits.

The optical computer and detection radar on the Remu civilization's battleships were far inferior to the Thunder Flash. Due to the extremely long distance and various trajectories, their hit rate was very low.

2 hits could only cause insignificant damage on the Thunder Fire's energy shield. At most, it caused the energy shield to lose some of its durability.

The durability of the energy shield was constantly recovering. Hence, it was meaningless if they were unable to continuously hit Lin Dong's Thunder Flash.

After breaking through their defenses, Lin Dong controlled the Thunder Fire to once again charge back to them. He once again entered the last planet.

The Thunder Flash's first wave of attacks was mainly to create a disaster.

The disaster caused huge destruction on the planets. However, the drawback was that the effect was slow, so Lin Dong had to speed up the process.

Lin Dong went through all 4 habitable planets once.

His main goal was to destroy those facilities that could slow down and prevent the spread of the disaster.

If necessary, Lin Dong had to speed up the area of destruction caused by the flood.

After spending 90 minutes, Lin Dong used 15 rounds of ammunition for the main cannon, 100 rounds of ammunition for the secondary cannon. With that, he obtained 154 source points.

Main cannon ammunition: 50 rounds. Secondary cannon ammunition: 2,000 rounds. Remaining source points: 1,295.

As the disaster continued, the number of additional source points that Lin Dong obtained also increased.

Thunder Flash broke through the defensive line and entered the interior of the planet. The Remu civilization's battleships were unable to fight like him. They could only rely on the defensive strength of the interior of the planet, and were completely unable to stop Lin Dong.

The planet's jets and missiles could not even destroy the outer armor of the Thunder Flash. They could not stop Lin Dong at all.

Lin Dong ignored them. He waited until the number of jets behind him had gathered before using the secondary cannons to bombard them. After the bombardment, he was able to destroy all the jets.

With his experience, Lin Dong relied on the energy shield to break through like the first habitable planet.

After spending an hour, including the 30 battleships that were destroyed when he broke through the Remu civilization's defensive line, he used up 25 main cannon ammunition and 230 secondary cannon ammunition. He obtained a total of 241 source points.

Main cannon ammunition: 25 rounds. Secondary cannon ammunition: 1,770 rounds. Remaining source points: 1,536.

After that, he went to the second planet. After spending an hour, he destroyed 25 battleships when he broke through the Remu civilization's defensive line. He used up 22 main cannon ammunition and 265 secondary cannon ammunition. He obtained a total of 166 source points.

Main cannon ammunition: 3 rounds. Secondary cannon ammunition: 1,505 rounds. Remaining source points: 1,752.

Later, he went to the last planet. This time, Lin Dong did not use the main cannon. Instead, he relied on his skills and tactics to achieve his goal.

After an hour, when he broke through the Remu civilization's defensive line, he destroyed 20 battleships and consumed 400 rounds of secondary cannon ammunition. He was able to obtain a total of 132 points.

Main cannon ammunition: 3 rounds. Secondary cannon ammunition: 1,105 rounds. Remaining source points: 1,894.

Then, Lin Dong did not attack anymore.

If he used all the main cannon ammunition, the enemy would know what Lin Dong was up to. With that, he would not be a threat to them anymore.

There were not many secondary cannon ammunition left and it was impossible to use up all of them. Even though he could get more out of it, it was clearly not worth it.

Moreover, through the observation of the detection radar, All the residents in the 4 habitable planets had evacuated. If Lin Dong tried to enter the planets again, he would not get a lot out of it.

The cities that had been destroyed earlier had also been saved, and the casualties were gradually decreasing.

Lin Dong had already maximized the gains from this alternate space battlefield.

From the start of the battle to the end, a total of 14 hours had passed.

There were still 10 hours left before Lin Dong would need to return to his original universe.