High-level martial arts: Contract cashback, invincible starting from the Zerg.

After informing Wu Yingguang of the situation, Chen Feng immediately squatted down and began to examine what treasures the Earth-rank Darkborn captain possessed.

Besides the thorn necklace around her neck, the Darkin sniper's Iron Body Armor and Shadow Mask can also fetch a good price at TN73 base.

However, this armor is highly compatible with the essence of the Darkin warriors. Once a Darkin dies, all the enhancement components will fail simultaneously, and the Iron Armor and Shadow Mask will become a set of heavy metal waste weighing dozens of kilograms.

Just as Chen Feng was about to stand up, a small, dark stone fell out of the Darkin's armor.

When it landed in the hands of the Dark Ones, it unexpectedly emitted dim light, projecting a document.

Although Chen Feng did not understand Darkin language, the Lucky Contract system supported translating any language using luck points.

Chen Feng paused for a moment, then took out his AI to photograph the contents of the document as evidence. At the same time, he pressed the snap on the tactical backpack, and the hatch on the back of the backpack popped open instantly.

A crystal-devouring beast, the size of a watermelon and shimmering with metallic light, immediately shot out like an arrow.

"Xiao Ning, go and absorb him."

The Crystal Devouring Beast's nostrils twitched incessantly, and its large black eyes immediately locked onto the Darkin Captain's corpse, filled with an extreme thirst for energy.

Before Chen Feng could say anything, the Crystal Devouring Beast had already nimbly climbed onto the Darkin Captain's chest. Its sharp metal claws, like daggers tempered with cold, easily sliced ​​through the Xuan Iron Armor.

The moment the armor plate cracked, a faint, dark purple mist seeped out from the crack—the energy of the Darkborn's origin gradually dissipating.

At this moment, the Crystal-Devouring Beast seemed to spot something delicious. Its sharp claws and teeth moved in unison, quickly carving a gash in the Darkin Captain's chest and snatching out a dark gold Darkin crystal the size of a pigeon's egg.

—It is the core of the Darkin, which contains the original power of this Earth-rank Darkin captain.

As the Crystal Devouring Beast raised its head, it swallowed the Darkin Core whole in one gulp.

The next second, its crystal scales suddenly glowed with a faint dark golden light, its small body swelled up slightly, and its originally dark eyes seemed to become even brighter.

Just as the Crystal Devouring Beast was still sniffing the Darkborn corpse with unfinished business, its nose suddenly twitched a few more times, as if it had caught an even stronger scent of energy.

Instantly, the Crystal Devouring Beast's eyes sharpened, and with all its might, it charged towards the corpses of the two Darkin snipers not far away like a black lightning bolt.

The speed is astonishing!!

Chen Feng watched the Crystal Devouring Beast's hurried retreating figure, a knowing smile playing on his lips. He shook his head and murmured, "This little thing is even more impatient than I am."

Chen Feng carefully saved the captured document images, then put away his smart brain. He glanced at the Xuan Tie armor and Shadow Mask on the ground, which had been completely rendered useless, and then walked back the way he came.

......

Before long, Chen Feng returned to the position guarded by the Blue Leopard Squad with the Crystal Devouring Beast.

That familiar battlefield now exuded an indescribable heaviness.

Originally, the elite Blue Leopards numbered thirty, but now, due to the attack by high-ranking Dark Indigenous soldiers, less than two-thirds of them remain.

Even so, the Blue Panthers remained vigilant—gripping their automatic rifles and scanning the surrounding ruins with wary eyes, guarding against another Darkin attack.

"Chen Feng, you're back." Su Wan waved to Chen Feng.

Chen Feng nodded, but his gaze swept over the scene of casualties on the battlefield again, and his tone became a little more serious: "It seems that the Blue Leopard Legion has suffered considerable losses."

Su Wan sighed.

"Darkin snipers are always unpredictable, but even if the Blue Panthers are likely to be wiped out, they cannot retreat."

Just then, Xu Ri Dong Cuo walked towards Wu Ying Guang from among a pile of instruments.

"Dongcuo, how's it going? Is the quantum communication matrix still not working?"

Xu Ri Dong Cuo shook his head, his tone tinged with helplessness and gravity: "No, it seems the Darkin have interfered with the matrix signal in advance. The channel is completely blocked. No matter how we try to adjust it, we can't establish a connection and can't get through to the communication matrix."

Upon hearing this, the Blue Leopard Squadron Commander immediately turned grim.

Without access to the quantum communication matrix channel, no matter how capable they are, they will not be able to find the core of the communication matrix in the short term.

After a moment of silence, Wu Yingguang looked at Su Wan.

"If the quantum communication matrix fails, we'll have to go in through the underground fortress... Su Wan, can you open the entrance to the underground fortress?"

"There's an entrance to an underground fortress here, which was an early emergency passage for the base. The encryption level might be lower than other passages. Hopefully, the Darkin haven't discovered that passage."

As Su Wan spoke, she walked to a metal cover half-hidden by rubble at the edge of the position. With a light kick of her boot, dust fell, revealing a rusty but still sturdy alloy door underneath.

Then, Su Wan opened her tactical backpack and took out the combat AI and the decryption AI, rapidly switching between the two AI screens with her fingertips.

"Cracking basic permissions..." she muttered to herself, her eyes frighteningly focused, her fingertips rapidly tapping the edge of the key, each press multiplying the data on the communication panel.

"Su Wan is generating a key to the access route. Everyone, please be on alert," Wu Yingguang said in the communication channel.

However, at that moment, Xu Ri Dong Cuo approached, his eyes fixed on Su Wan's movements: "The underground passage has a complex internal structure, and if it is sealed off from the inside, all the firepower devices will be activated."

"I will try my best to find a safer route," Su Wan said calmly. "The quantum matrix has been completely locked onto by the Darkin. I believe that the main force of the Darkin will arrive soon, and then we will have no chance at all."

At this moment, Chen Feng stood a little distance away, his gaze sweeping across the shadows surrounding the underground fortress.

Meanwhile, the Crystal Devouring Beast Xiao Ning lay obediently inside Chen Feng's tactical backpack, its metal scales slightly closed, leaving only a pair of bright black eyes that moved alertly. It could detect any abnormal energy fluctuations immediately.

Just then, Su Wan's fingertips suddenly paused.

"There's resistance." She frowned slightly. "This passage is also encrypted. If it's not cracked, the entrance will immediately initiate a self-destruct mechanism, and the entire passage will collapse."

Wu Yingguang's eyes narrowed: "Can we go around it?"

Give me a minute.

Su Wan took a deep breath and waved her hands like fluttering butterflies.

The data on the smart brain panel also flickered violently, as if struggling against it.

At this moment, everyone in the position held their breath, afraid of disturbing Su Wan in the slightest.

......

I don't know how much time has passed.

Click—

With a dull mechanical click as the alloy cover closed, the message "Key access confirmed" appeared on Su Wan's smart device.

"Successfully cracked." Su Wan looked at her slightly white fingertips and said with a smile, "The entrance has been opened, but the signal inside will be completely blocked. Once inside, we'll have to rely on ourselves."

Wu Yingguang immediately ordered: "Everyone, take light equipment first, distribute ammunition equally, the wounded stay here, Jack and Zhao Ye will be in charge of organizing the defense line. Xu Ri Dong Cuo, you have the people from the Ministry of Energy follow us, Su Wan will bring up the rear."

Su Wan raised her hand and pressed the power button on the smart brain.

The heavy alloy door slowly opened outwards, and a cold, damp wind carrying a faint rusty smell immediately rushed out.

But in the depths of darkness before him, Chen Feng could not see the end of the passage...