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

After Chen Feng formed an alliance with Karendius Ash through a demonic contract, he almost forgot about this powerful being.

This 156th demon lord born from purgatory, although not a typical veteran among demon lords, possesses a powerful combat strength that even Heavenly Rank Dark Descendants and Heavenly Rank Avatars cannot match.

Chen Feng immediately contacted Karendius Jin through a demon contract and tried to figure out why he was attacked by a demon this time.

Because demon lords have a very clear sense of the actions of their kind.

Chen Feng: "Karendyus Jhin, this is Chen Feng. We've just been attacked by demons and would like to ask you about the situation..."

Karendius Jhin: "It's quite rare that you would actually remember to contact me, your covenant whom you've completely forgotten... Hmm... I took a look, and there are indeed a few troublesome guys in your position."

Chen Feng: "Is it a low-level demon?"

Karendius Ash: "Not lesser demons! But several demon royalty... though there's one among them you should be especially careful of."

Chen Feng: "Which one?"

Karendius Jhin: "A succubus named Nefarian, I asked around with my friend, and it seems she recently acquired a card called [Black Wall], which has significantly increased her power."

Chen Feng: "[The Black Wall]?"

Karendius Jhin: "That's roughly the name. Do you need my help?"

Chen Feng: "Not for now. I have four companions here, and I don't want to expose our relationship."

Karendius Jhin's voice carried a hint of nonchalant languor, as if he were lying in a comfortable place enjoying leisure. After a moment, he casually said, "That girl is the most cunning and treacherous among those demons. She's the succubus who wields the [Black Wall] card—Nefarian. I'd guess most likely that she was behind this attack."

Chen Feng: "Okay, I understand."

When Chen Feng was still at Battle Academy, he had heard of the ever-changing cards created by Card Master Atreides.

Those were seven spirit artifact cards crafted from the bones and blood of a colossal nine-tailed fox beast of the Flood level, which together formed the divine artifact [The Ever-Changing Cards].

Before Atreides the Card Master died, he dismantled his Variations card set into seven Mystic Main Cards, each with its own powerful abilities. After that, these powerful cards disappeared without a trace.

And what Karendius Ash called the "Black Wall"...

It is one of them.

Master Atreides forged the cards of change with the intention of countering the invasion of the Abyss Demon Lords, and the [Black Wall] was created specifically for a demon friend to ensure that he would not be attacked by enemies when casting powerful forbidden demonic spells.

However, after a century, this card, whose combat value was comparable to that of [Green Harbor], ended up in the hands of a succubus.

It's rather ironic.

"Chen Feng, what are you thinking about!" Su Wan's voice came through the communication headset, slightly breathless.

At this moment, the five red foxes were moving quickly along the safe route determined by Su Wan, using their superhuman strength. In order not to slow down the others, the little boy was carried directly on Chen Feng's shoulder.

"I'm wondering why the demons shot down our fighter jets so easily. There might not be such a simple reason behind it," Chen Feng said.

"Heh, I think the same as Chen Feng. The demons are generally not very vigilant. Our armed fighter jets are patrolling at high altitudes, so it is impossible for them to detect us."

Zhao Ye also joined the discussion about conspiracy theories.

"If we connect the initial rescue mission with the subsequent emergency mission, I suspect this could be a surprising intricate scheme within a scheme."

Just as the three were discussing...

Wu Yingguang's calm and collected voice came through the communication channel.

"Be careful of your surroundings. We are now in the outer domain of the Eye of the Beast, not inside the base. If you have anything to discuss, let's talk about it when we get back to the base alive."

The five of them ran at high speed along the return route for another five minutes.

"How much longer until we can leave this demon territory?" Zhao Ye asked in a deep voice, his tone tinged with urgency.

It seemed that both he and Chen Feng vaguely sensed a cold, dark aura approaching...

Su Wan glanced down at the AI, her expression instantly turning serious: "At least another ten minutes! But..."

Before she could finish speaking, the AI ​​suddenly emitted a sharp, piercing alarm, and the three-dimensional blue light model reappeared in Su Wan's hand.

[WARNING! Three unknown creatures detected rapidly approaching! Expected arrival in 30 seconds!]

[Warning! The demonic signal is intensifying! The distance is decreasing, and the current speed is insufficient to escape!]

"Stop!" Wu Yingguang shouted.

Instantly, the five members of Red Fox stopped fleeing.

"There's no way to escape. That demon is much faster than us. If we run, he'll just pick us off one by one."

Wu Yingguang glanced at everyone and said in a deep voice.

"Su Wan, continue to monitor the demon's movements. Zhao Ye, Jack, and Chen Feng, you two are responsible for holding them off from the front. I will make my move at the crucial moment. Remember, the kill speed must be fast."

......

The wind swirled, carrying with it the scent of decaying leaves and the pungent smell of vegetation, brushing against Nefarian's inky black hair...

The three black-walled servants suddenly slowed their pace, a hint of confusion appearing in their dark red eyes, and low moans emanating from their throats—their perception, far exceeding that of ordinary demons, seemed to have caught a strange sensation in their surroundings.

Nefarian's levitating figure remained light, her toes barely touching a patch of winding wild grass.

The previously eerily upturned corners of his lips slowly lost their disdainful curve, replaced by a faint, cold look of doubt.

She turned her head slightly to the side.

She raised her slender, fair hand and pinched a scarlet thread from the air in front of her, while her brows furrowed slightly at that moment.

"Something's not right... The human elite shouldn't be so quiet."

Nefarian's voice suddenly took on a colder tone.