The world is frozen: I spent a billion dollars to build the strongest safe house

As soon as Su Mu finished speaking, the pattern on his forehead that looked like a third eye suddenly flashed with light, and the villa under his feet began to shake slightly.

"Master, master, where are you? There's an earthquake. Run!"

"It's an earthquake, it's an earthquake! Boss, help!"

Feeling the vibration, Qin Keer and Wang Hao's panicked shouts came from downstairs.

"Don't panic!"

Su Mu shouted loudly, and his calm voice spread throughout the villa, "My villa has begun to be upgraded. Please stay where you are to avoid getting hurt!"

Villa upgrade?

What the hell is that?

Everyone was confused, but they could only obey Su Mu's instructions and stay there fearfully, not daring to move.

Fortunately, the villa stopped shaking after a while, and then Su Mu heard the system prompts in his mind.

[Ding: The upgrade of the Doomsday Fortress has begun. The upgrade takes 8 hours. The current progress is 0%. The base can be used normally during the upgrade. 】

The system finally started to upgrade. Su Mu felt that a large part of various materials in the infinite space disappeared out of thin air, and he didn't know where they went.

"Huh~ I didn't expect that the system upgrade would take so long!"

Su Mu yawned, "Forget it, just take this opportunity to take a good rest!"

He stayed up all night in order to collect the crystal cores needed for the upgrade, and now he was very tired.

So I greeted everyone, the alarm was lifted, and they were allowed to do their respective jobs according to the division of labor.

He returned to the bedroom, hugged Lao Mo and fell asleep in a dark place.

Su Mu slept until dusk when he woke up leisurely and saw that it would take nearly an hour for the system upgrade to be completed.

He knew it was useless to be anxious. After washing up slowly, he took out a bowl of Yangchun noodles for dinner. Of course, he did not forget to give Lao Mo a large piece of steak!

After eating and drinking, Su Mu began to check the situation of the villa.

Qin Keer is conducting experiments in a laboratory specially prepared for her. The test subjects are the poor werewolf Zhang Shuai and the zombie Qiao Baichuan!

Wang Hao and his seven younger brothers are producing and processing various weapons and ammunition under the guidance of Geng Tianfu.

Seeing nothing unusual inside the villa, Su Mu turned his attention outside the villa.

He observed through the drone that some zombies appeared one after another outside the villa, but the number was much smaller than last night.

They wander aimlessly in the snow, occasionally fighting and even devouring each other.

Especially around the villa, the corpses of the zombies killed yesterday attracted hundreds of zombies, each of them vying to devour the corpses. They seemed to have no interest in attacking the villa not far away.

There must have been more than a thousand zombies who died around the villa last night. Although many were burned to char by napalm bombs, there were still four to five hundred corpses piled up in the distance.

Those zombies were like scavenging hyenas, opening their bloody mouths and constantly tearing apart pieces of flesh from the dead bodies, leaving a bloody mess all around.

Su Mu was shocked. He didn't expect zombies to have such a characteristic!

"Is it true that the zombies in the novel further evolve by eating each other?"

He touched his chin, "No matter what, the crystal cores delivered to my door are free of charge!"

Su Mu saw that Wang Hao and others were busy, so he didn't ask them to come over to help. He first took out his m-200 sniper rifle and shot the heads of the zombies in the farthest place!

After the zombies were alerted, Su Mu immediately closed the shooting hole, directly controlled the drone to take off, and started shooting the zombies below.

With last night's experience, his shooting skills have improved significantly today. On average, he can kill a zombie with less than 7 bullets.

But after all the bullets carried by the ten drones were exhausted, there were still sixty or seventy zombies left.

Su Mu scratched his head, sent two Catwoman robots to get out with hunting knives, and quietly approached a zombie.

The zombie was staring warily at the drone hovering in the sky, its nose twitched, and it looked doubtfully at the two strange-looking robots approaching from behind.

Seemingly feeling that they were no threat, he looked up at the drone again and let out a low growl of "Woooo".

"good chance!"

Su Mu was overjoyed, and quickly controlled a Catwoman robot to step forward, wielding a hunting knife and slashing at the zombie's neck!

A cold light flashed, the zombie's head flew high, and the dirty blood from its neck sprayed out more than three feet high!

But even if its head was chopped off, the zombie was not completely dead!

The head fell on the snow, its mouth opened and closed, and I didn't know what it was roaring.

The zombie's body is also twisting and turning, as if looking for its own head!

Su Mu controlled another Catwoman robot to step forward and split the zombie's head in half with a knife. The white brains spilled on the floor, and it died unwillingly!

The other zombies around them turned their heads when they heard the movement, their noses twitching.

However, other than the two robots standing blankly on the snow, they saw no other movement, so they all turned back.

It feels so good to be the sixth child!

Su Mu was overjoyed. Zombies were indeed not interested in machinery and plastic, so he could sneak up on them and kill them easily!

However, to be on the safe side, while Su Mu controlled the Catwoman robot for a sneak attack, he sent the drones back to the villa to reload, and then used a sniper rifle to kill a few zombies.

Not long after, all the zombies that were devouring the same kind of corpses around the villa were killed by Su Mu, contributing a total of 7 first-level crystal nuclei!

As soon as Su Mu packed up everything, a system prompt sounded in his mind.

[Ding: The Doomsday Fortress has been successfully upgraded to level 1, and related areas and functions have been unlocked. Please explore the specific situation by yourself! 】

[Requirements for the next level upgrade: 1000 million tons of alloy, 1000 million cubic meters of stone, 1000 million cubic meters of wood, 1000 million tons of grain, 1000 million tons of oil, 1000 million tons of rare earths, 100 tons of gold, and 1000 secondary crystal nuclei. 】

[In addition, the main control room, science and technology research institute, and energy center need to reach level 10, other building levels must be upgraded to level 7 or above, and the population in the base must exceed 1000 people! 】

The base was finally upgraded successfully!

Su Mu was overjoyed. He felt that with the successful upgrade of the base, a magical power was constantly surging in his body, and his whole body seemed to be full of explosive power!

And his senses are much sharper than before. He can even clearly see the subtle patterns on the clock hanging on the wall ten meters away!

At the same time, a virtual screen appeared in front of his eyes, which displayed different patterns with their names marked in text:

General control room, living area, material storage warehouse, planting base, military factory, science and technology research institute, energy center, smelting center, treatment center, training camp, fence, prison, radar, turret, anti-aircraft turret...

It was just that the amount of materials needed to upgrade the Doomsday Fortress to Level 2 made Su Mu take a breath of cold air and pinch his teeth!

Ma Dan, 1000 million tons of various materials, 1000 secondary crystal cores, and a total population of more than 1000. Wouldn't this cost him his life?

Su Mu has a headache. How long will it take for me to collect so many things?

And there is even a population target. I just want to keep going. I have accepted Wang Hao and the others as my younger brothers just for the convenience of collecting items!

As for Qin Keer, well, Su Mu admitted that sometimes he was greedy for her body!