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

Chen Feng's gaze pierced through the shimmering water curtain, taking in the breathtaking battle between Bai Fei and the giant dragon.

Although Bai Fei was agile, her "Abyss Strangulation Whip" possessed considerable destructive power, inflicting significant damage on the Xuan-rank giant dragon with each strike.

However, Chen Feng soon realized that although Bai Fei possessed the fighting power to resist the giant dragon, her strength was still somewhat inadequate in the face of this ferocious giant dragon.

The giant dragon's body was as large as a mountain, its scales as hard as iron, and every swing of its tail stirred up surging undercurrents.

Although Bai Fei could barely hold off the attack, she clearly lacked the fighting power to completely capture the giant dragon.

After pondering for a moment, Chen Feng immediately opened the strategic resource interface of the Lucky Contract system.

Immediately afterwards, Chen Feng's hands flew, frantically pulling out one "piranha talisman" after another, each emitting a ghostly glow, from the system.

After assessing the initial effects, Chen Feng immediately launched a "Double Items and Luck Value Return Event," causing the number of piranhas summoned to increase rapidly.

Soon, a miracle happened!!

The once tranquil underwater world seemed to be awakened by an invisible force, and the entire body of water began to churn violently.

Those magnificent piranhas, which were originally scattered in various places, seemed to have been summoned by some mysterious force.

They flocked in from all directions.

Their eyes gleamed with a bloodthirsty red light, their bodies appearing and disappearing in the eerie glow, like a horde of ghosts from hell surrounding the giant dragon, gradually forming a massive encirclement...

"Bai Fei, I'm controlling the piranhas to intercept and attack it. You can take this opportunity to strike it."

Chen Feng's voice drifted through the Lucky Contract System, immediately lifting Bai Fei's spirits.

The giant dragon, which had been fleeing at high speed like a wild horse, was now tightly enveloped by a small, eerie black shadow. Its massive body was struggling uncontrollably, as if it had been attacked.

Bai Fei activated the aquatic armor's sensory mode, and only then did she realize that the dark figures were actually a large group of magnificent piranhas!

Those creatures that were usually dull and stupid, with only food on their minds, were now densely packed together, forming a giant net to counterattack the giant dragon, constantly sweeping across its head.

Moo moo—!

No matter how many of the magnificent piranhas were smashed to pieces by the giant dragon's tail, the entire group of magnificent piranhas continued to bombard the giant dragon's eyes, like a deadly fishing net relentlessly covering and attacking.

However, this was only the beginning of the nightmare.

What Bai Fei found even more terrifying was that behind the magnificent battlefield where the giant piranha dragons were locked in combat, even larger and denser black shadows were surging in like a tidal wave.

The overwhelming array seemed to engulf the entire world.

Upon closer inspection, the number of piranhas represented by these shadowy figures is dozens of times greater than the number currently entangled with the giant dragon!

Bai Fei seemed to suddenly realize something, and immediately stopped approaching the giant dragon, opening the Lucky Contract System to ask Chen Feng.

"Senior, is this your work? A magnificent piranha?"

"Yes, I used my luck stat to create the attack rune."

"I see. So, how much luck value was used?"

"Each rune costs 300 luck points, but I have a promotion right now where you can get one free if you buy these runes..." Chen Feng explained.

"Is this the luck value return event you mentioned before?" Bai Fei asked with a smile.

"Haha, yes, Bai Fei, there are 30 seconds left..."

A sweet smile appeared on Bai Fei's lips, but she glanced thoughtfully at the surrounding water.

"Senior, I have a better plan. Would you like to gain even more cultivation points?"

"I'll pause the event for now. Tell me your suggestions..."

Bai Fei nodded and began to share her insights.

His confident expression suggested that he had been planning this for a long time.

"There are already too many piranhas. If they get out of control, this area of ​​water will probably be plunged into a bloodbath. But if we can lure other Xuan-level behemoths here, they will become the targets of the piranhas instead of us, sharing the risks for us. We can also take the opportunity to make a fortune."

"You mean to lure other behemoths with 'Whispers of Chaos' and then have me control piranhas to attack them?"

"Just like the piranhas you control, attack their senses and make them their prey. All we need to do is drive away the remaining piranha army and obtain the cores of these Xuan-rank behemoths," Bai Fei explained.

"I understand now, Bai Fei, that's indeed a good suggestion..."

"It was you who started it, senior, that taught me how to do it..."

"You're too modest, Bai Fei. I've always thought you were actually very smart..." Chen Feng exclaimed.

A moment later, Chen Feng's voice came through again.

"If that's the plan, then I'll start summoning more piranhas. Bai Fei, you can start your plan now."

"No problem, then I'll start using 'Whispers of Chaos' too."

"Let this bloodshed rage even more fiercely," Chen Feng sighed.

The two, exchanging information, both smiled.

Although this battle has exceeded their original plans...

However, both of them found a familiar feeling again—a feeling of being cared for and protected...

Bai Fei didn't think much of it.

He immediately began adjusting the "Chaos Whisper" device attached to the aquatic battle armor, causing it to emit a death sonic wave reminiscent of a Xuan-rank twin behemoth.

Like the giant beasts on land, the aquatic servants of the Giant Beast Lake obtain the energy for evolution by constantly eating, while the aquatic giant beasts also obtain the energy for advancement by eliminating other giant beasts.

The Xuan-level twin behemoths, with their highly cost-effective twin behemoth cores, are favored by behemoths and may even attract other aquatic behemoths!

As the deathly sonic waves emanating from the "Whispers of Chaos" device continued to spread.

The entire lake seemed to be caught in a strange restlessness.

The sound waves acted like an invisible signal, sending a maddening message to the surrounding aquatic behemoths—the core energy of a Xuan-rank twin behemoth was here!

In an instant, the once calm lake became turbulent with undercurrents.

The huge, ferocious eyes that were originally hidden in the depths of darkness now radiated a chillingly menacing light in the dark water.

They were like a group of megalodon that had caught the scent of blood, their ferocity completely unleashed by the deadly temptation.

They darted and swam through the water at great speed, stirring up turbid eddies and waves wherever they went.

And this was merely the prelude to a bloody nightmare...