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

For the next few days, Chen Feng stayed inside the Tower of Babel, practicing the Soldier Body Tempering Technique.

Unlike the threat of giant beasts, the threat of demon races to warriors is all-encompassing, because they can not only easily approach warriors in the guise of other people, but also completely use other people's hands to scheme against you.

Therefore, the threat level posed by demons within the Great Xia Kingdom is often greater than that of giant beasts breaking through the defenses.

To ensure his own safety, Chen Feng now only has one path to take: to successfully advance to the 8th level of the Profound Rank Battle Warrior. Only then can he more easily hunt down other demons with Wei Yang's cooperation.

At this moment, Chen Feng, sitting upright in the training room, was evenly bearing the weight of 150 jin (approximately 75 kg) all over his body. This was the main training technique of the soldier's body tempering art, which relied on spiritual energy and heavy pressure to cultivate the strength of one's own body. This process was also known as "armor tempering".

Once Chen Feng breaks through to the 8th level of [Armor Tempering], his bone density and muscle strength will be greatly enhanced.

However, just as Chen Feng was immersed in cultivation, a stinging pain appeared on his cheek, as if his combat instincts were reminding him of something.

Chen Feng slowly opened his eyes, only to see a figure flash by outside the door of the cultivation room.

How could that be?

Chen Feng couldn't help but feel doubtful.

The Tower of Babel training room is generally only open to the Starfish City Guard and is also one of the most heavily guarded locations.

Not to mention the comprehensive intelligent security system inside the training room, the security inspection system outside the training room alone can block intruders below the ground level.

Looking across the entire Starfish City, there are only three Earth-rank experts; there's simply no way there could be anyone else…

Could it be the demon that Wei Yang spoke of?

Chen Feng frowned and immediately reached out and pressed the pause button on the wall.

When Chen Feng, with his muscular physique, walked out of the training room, the color of his muscles quickly returned to normal, and the radiating heat from his body dissipated rapidly under the air conditioning.

However, Chen Feng didn't care about any of that.

Because of his extensive combat experience, he did indeed detect a slight anomaly in the air.

The unusual smell didn't come from a demon, nor from any member of the guard. This meant Chen Feng's perception wasn't wrong; someone from outside had indeed entered!

Chen Feng glanced at another occupied training room not far away.

Inside, the female guards were still engaged in some kind of cultivation. The entire cultivation room shimmered with a gentle, pale blue light, and the female guards seemed to be immersed in a tender dream, cultivating in tranquility.

Chen Feng took a few more steps and looked at the other guards who were cultivating.

Without exception, none of them had any personal safety...

and many more!

In the corner of his eye just now, Chen Feng seemed to catch another glimpse of that rapidly moving figure!

Chen Feng's brows furrowed instantly, and he swiftly summoned the Demon Slayer Armor on both hands!

Clang!! Clang!! Clang!!

Clang!! Clang!! Clang!!

Suddenly, two sharp daggers slashed towards Chen Feng's throat like birds in flight.

Every attack was so vicious and ruthless, seemingly intent on killing Chen Feng!

Chen Feng immediately activated [Eye of Foresight], quickly blocking the enemy's rapid attacks based on their attack trajectories.

He parried several of the enemy's dagger strikes with his extremely tough Demon Slayer armor!

"Damn it!!"

After successfully parrying the attack, Chen Feng quickly retreated, trying to create some distance between himself and the assassin.

Unexpectedly, the assassin made several leaps, relentlessly pursuing Chen Feng with extremely agile footwork.

Even the dagger in his hand was being swung faster and faster.

Chen Feng soon discovered that the assassin's true strength was no less than his own!

After hastily parrying several more assassination attempts, Chen Feng finally found an opportunity and quickly summoned the complete Demon Slayer Armor, from which two extremely long insectoid blades extended.

Chen Feng pulled two Zerg longswords from his fully armed battle armor.

At this moment, Chen Feng had already used the Soldier Body Tempering Technique to strengthen all his armor and weapons, and was ready to do everything in his power to kill his opponent.

However, the assassin seemed to realize Chen Feng's intention, immediately halting his attack and leisurely retreating...

"What's wrong? Don't you dare fight anymore?" Chen Feng sneered.

Just then, from beneath the assassin's tightly concealed hood, a woman's voice coldly rang out.

"You are the demon slayer Chen Feng."

The assassin's voice was icy cold, as if stating a trivial fact.

"That's right, that's me."

Chen Feng sneered.

"You sound like a human. Could you be someone sent by some family to plot against me?"

"What? You've made quite a few enemies?"

The assassin's voice came from inside, but this time Chen Feng noticed something amiss.

This doesn't seem to be a human sound, but rather the sound of some kind of vocal machine.

Chen Feng frowned and began to slowly walk towards the direction of the assassin.

This time, however, the assassin offered no resistance or retreat, but simply stood quietly in place, waiting for Chen Feng to approach.

It wasn't until Chen Feng lifted the assassin's hood that the assassin's face was fully revealed.

It turned out to be a machine that had lost its last bit of power.

......

At this moment, several people were standing in front of the large screen in the Tower of Babel monitoring room.

Ye Qingnan, the Great Xia envoy, and several powerful servants.

Only after Chen Feng removed the assassin's hood did the blue gem on the Great Xia envoy's staff slowly dim its light.

Ye Qingnan turned around and looked at the Great Xia envoy.

"As I told you, he's a promising prospect," Ye Qingnan said carefully, adjusting his gold-rimmed glasses.

The Great Xia envoy stared at Chen Feng on the monitor screen without comment. Her silence was like a finely crafted scalpel, instantly dissecting Chen Feng into countless parts.

"Look, how about we give him some time to adapt? I'll help him grow as quickly as possible," Ye Qingnan continued.

Seeing Chen Feng's puzzled expression on the screen, Ye Qingnan also felt a little uneasy.

Just as he was about to reach out and pat the Great Xia envoy on the shoulder, his hand was firmly grasped by an even stronger hand, freezing him in mid-air, unable to move an inch further.

Ye Qingnan turned her head and saw that it was the servants behind the Great Xia envoy who had made the move.

Only then did Ye Qingnan see the servant's true face...

He was half a head taller than the Great Xia envoy, his body seemed to be cast from black iron, and the muscles bulging under his coarse tunic were like layers of mountain rocks, each one containing explosive power.

Several old scars crisscrossed the corners of his eyes, resembling remnants of some mysterious totem.