Doomsday Rebirth: The heroine comes back with the system

"The people at the research institute discovered a very small crystal in the zombies' brains these days. They named it a crystal core. There is a kind of energy in the crystal core that can be absorbed by the human body."

As they walked, Lu Chi said to Yin An, "The researcher named Lin Feng whom you recommended made the greatest contribution to this major discovery."

Yin An nodded and said in surprise: "There are such magical crystals in the zombies' brains."

"Yes, and it is reported that there has been new progress in the research today."

As Lu Chi spoke, the two of them walked into the research institute building.

As soon as they saw Lu Chi, two researchers came to lead the way.

They walked through the crowded research rooms and academic rooms and arrived at the innermost confidential research hall.

Several gray-haired researchers were gathered together for a heated discussion.

Lin Feng was in the middle of the crowd.

When they saw Lu Chi, they all stopped discussing: "Commander Lu."

The most experienced researcher among them pulled Lin Feng over and said, "Commander, you're just in time. We just made a new breakthrough."

After that, he pushed Lin Feng up and said, "Let our young and promising Dr. Lin give a report."

It was obvious that everyone admired Lin Feng very much.

Lin Feng was flattered.

He first called out to Yin An respectfully, "Captain."

Then he said to Lu Chi: "Commander Lu, we found that the crystal core can upgrade superpowers."

Then, he pointed to the dozens of crystal cores on the table and said, "These are the crystal cores we dug up today by the base army. There are already seventy-eight of them. We invited several psychics to try to upgrade their powers, but none of them succeeded."

After a second of silence, Lin Feng adjusted his glasses frame and said, "We conservatively estimate that there may not be enough crystal cores, and the energy has not yet reached the peak of the upgrade."

Lu Chi nodded: "I will arrange for someone to dig for the crystal core as soon as possible."

Just at this moment, a soldier rushed in: "Commander, commander!"

"I don't know who leaked the news about the crystal core, but people outside started scrambling to get the crystal core like crazy, and even many people inside followed suit!"

The next second, the intercom on Lu Chi's waist rang, and an anxious voice of a soldier came out:

"Commander, all the psychics are digging for crystal cores in the zombie pile outside the base, and no one is collecting supplies!"

Lu Chi glanced at Yin An and said, "You should go back and rest first."

After saying that, he strode out and said, "Notify all troops to gather urgently!"

Lin Feng's eyes behind his glasses also became nervous: "Captain, you must be careful."

Yin An glanced at Lin Feng and nodded: "We are all fine, take care of yourself."

Then he ran out.

There was chaos outside at the moment, and all the troops were running outside.

Yin An could even hear the sound of people arguing outside the base.

She quickly returned to the special zone. Cheng Su and the others were already waiting on the first floor. When Xiao Rui saw Yin An, she rushed up and hugged her: "Sister Shengsheng!"

Yin An touched Xiao Rui's head and looked at the others and said, "Take the time to rest. Now that the crystal core matter has been leaked, the psychics outside are all going crazy. The next few days will be very chaotic."

Cheng Su and his companions immediately obeyed the order and went upstairs to rest.

Yin An also returned to her room. She slipped into the space, took a hot bath, and then went to the cloakroom to pick out a combat suit.

There is a special combat uniform area in the space villa's cloakroom, which is filled with hundreds of combat uniforms, each with different styles and all made of top-quality materials.

After picking out a new mask, Yin An woke up after sleeping for just four hours.

She looked at the 250 secondary crystal cores in the space.

All of this was saved up in the past two days.

She collected loot almost everywhere she went, including the piles of zombies outside the base, which she would search every time she passed by.

Yin An placed his hand on the secondary crystal core pile.

The next moment, the light-related ability was successfully upgraded to level three!

A beam of light gathered in Yin An's palm and shot towards the ground in the space.

The beam of light was like a laser, and it carved a deep groove on the ground with an extreme burning feeling!

Yin An's eyes lit up, and then he tried for another half an hour.

By controlling light, he transformed it into various shapes and explored the energy of light-related supernatural powers as much as possible.

But after all, the space and conditions are too limited now, so if you want to have better control, you still have to practice.

Yin An flashed out of the space and went downstairs. Cheng Su and others were already waiting downstairs.

Each of her teammates is very easy to take care of and always walks ahead of her.

Yin An placed a hundred level 2 crystal cores on the table: "All my abilities have been upgraded to level 3. All the level 2 crystal cores that follow will be upgraded for you. This is for now."

After she finished speaking, she looked at the four people and said, "You guys divide it among yourselves."

Cheng Su looked at Jiang He and Song Nian and laughed, "Ladies first!"

"Yes, ladies first." Ren You also politely expressed his concession.

"Sister Nian Nian, let her upgrade first. Her ice ability is very powerful!" Jiang He looked at Yin An with a smile, his eyes full of admiration and sincerity.

Song Nian was slightly stunned.

She glanced at the three of them.

He frowned slightly, and a mist suddenly spread out, blurring his vision.

How long has it been.

This feeling of being cared for and considered.

How long has it been since I last felt this?

"Thank you..."

Song Nian lowered his head, suppressing the tears in his eyes.

She walked forward and looked at the crystal core on the table. The frost in her eyes faded away, and she was filled with determination: "Then I will upgrade to level three first and protect all of you!"

After she finished speaking, she stretched out her hand and sensed the pile of crystal cores on the table.

The energy from the crystal core pile slowly rose and poured into her palm.

When Yin An looked at this scene, a piece of her frozen heart was moved. Her teammates had become like family members at this moment.

It gave her a strong sense of security and belonging.

She turned around and carried Xiao Rui into a room to teach her how to upgrade her superpowers to the second level.

"Sister Shengsheng, I have been controlling my superpowers at home these past few days according to the method you taught me." Xiao Rui said obediently after upgrading her superpowers.

"Okay, show me."

After Yin An finished speaking, he walked aside.

A stream of air was seen surging in Xiao Rui's palm, and dark green gas shot out in a straight line forward.

The next second, they were all taken back by Xiao Rui!

Yin An nodded, quite satisfied. Although it was still far from her requirements, everything had to be done slowly.

After all, Arui is still very young.

It was almost dusk.

After everything was arranged, Yin An took Cheng Su and others out. At this moment, almost everyone gathered outside the high wall of the base.

Outside the high walls were piles of smelly, dried-out zombie corpses.

All the superpowered people are digging into the zombies' brains to look for crystal cores.

The army was divided into two groups, one group was digging crystal cores, and the other group was responsible for maintaining order in the surrounding areas.

This is to prevent a fight among the crowd over the crystal cores.

"Boss."

Not far from the base gate, Bai Jinghe saw Yin An and his companions approaching:

"Why did you guys just come out? The base has just issued a notice that 100 first-level crystal cores can be upgraded. Now everyone is scrambling for the crystal cores."

"So how many have you dug?"

Bai Jinghe blinked his beautiful eyes and took out two pitiful crystal cores from his pocket.

He sighed softly, "It's strange, many zombies don't have crystal cores in their brains. We dug for four hours and only found these two."

Yin An nodded.

Every time she passed by the gate of the base, she would collect the crystal cores. It would be strange if there were any crystal cores.

He Qi, Zhang Meng and two other men also came over at this time.

"These are our new team members: Zhu Jun and Ge Yi."

After Bai Jinghe finished the introduction, He Qi immediately said, "This is our boss."

"From now on, you will be our common boss."

Zhu Jun and Ge Yi were stunned and hurriedly said respectfully: "Boss!"

Yin An nodded: "You guys continue digging, I'll go dig at the back door of the base."

After she finished speaking, she looked at Bai Jinghe meaningfully, then led Cheng Su and the others around the outer wall of the base and walked towards the back door.

Bai Jinghe immediately understood what Yin An meant. His eyes lit up and he immediately ordered He Qi and others to follow.

"Those guys are so weird. There are so many zombies here, but they don't dig. Instead, they go to the remote side."

In the crowd, a team member named Wu Lian behind Qiao Chunuo looked at Yin An and the others and murmured.

Qiao Chunuo threw away the empty zombie skull in his hand, looked at the backs of Yin An, Bai Jinghe and others, and whispered:

"Follow them."