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

The moment Bai Fei's order spread throughout the entire army.

A heavy tremor carrying an aura of destruction appeared on the battlefield, as if a moving mountain was crushing all obstacles and slowly approaching.

All eyes, including those of the White Feman Dragon Knights locked in fierce aerial combat, involuntarily turned towards the rear of the Iron Slaughter army. On that wasteland shrouded in thick smoke, a colossal creature was slowly moving.

It was a war behemoth powerful enough to make the heavens and earth pale in comparison.

Its size far exceeds that of Whitefey's Warbringer, Casey, resembling a giant fortress encased in steel and armor, covered with layers upon layers of dark, heavy armor.

Each piece of armor was several meters thick, its surface covered with jagged bone spikes and irregular protrusions, and a dark light, like solidified magma, flowed between the gaps in the armor.

The most striking feature of this colossal structure is the dozens of incredibly powerful giant cannons, which, like the mouths of a monstrous beast poised to fire, are evenly distributed across the front, sides, and top of the mother nest.

Each cannon had a thick barrel, the muzzle gleaming with a deep red light, as if it were about to burst forth at any moment and turn everything to ashes.

These cannons were scattered in different directions, some aimed at the raging insect legion that had regained its footing on the ground, some at the Manlong troops engaged in aerial combat, and others directly at the location of Bai Fei's war nest.

Bai Fei's heterochromatic eyes were fixed on the slowly approaching war nest.

She could clearly sense the world-destroying power contained within the Mother Nest, and she could also vaguely sense the aura of the Iron Queen.

—Cold, cruel, and brimming with an arrogant sense of certain victory.

"Casey, begin analyzing all of Gray Mountain's combat capabilities, immediately."

The nerve tentacles in Casey's control room throbbed more rapidly, quickly transmitting the analysis results to Bai Fei's ears via neural connections.

"Its armor is much thicker than we anticipated. Ordinary attacks simply cannot penetrate it. The power of those cannons is enough to destroy half of our swarm of hordes of insects in one go, and can even directly penetrate my outer armor layer."

There was no panic in Bai Fei's heterochromatic eyes, only a cold sharpness.

Instead of immediately issuing combat orders, she asked in a deep voice, "What exactly is the armor penetration threshold? Can you pinpoint the location of Gray Mountain's energy core?"

Casey's neural tendrils danced rapidly on the control panel, and data streams flashed like a waterfall on the virtual screen in front of Bai Fei: "The penetration threshold of three layers of armor is 17800 MPa. The instantaneous impact force of each giant cannon in Gray Mountain can reach 9200 MPa. Under continuous bombardment, a medium-class armor can only last for a maximum of two rounds."

"In addition, its energy core cannot be precisely located at present. Its energy core is surrounded by high-density armor and energy barrier. To determine its exact location, a cell invasion tactic is required."

"Cellular invasion tactics..." Bai Fei murmured.

Cell invasion tactics refer to the use of tiny parasitic cells carrying corrosive toxins to penetrate the body of an organism, multiply and cause damage, and eventually completely dismantle the organism's seemingly indestructible defenses after thoroughly investigating the interior.

It was from that moment that she realized that the strongest defenses can often be breached from within by the slightest force.

These cells are only one-thousandth the size of ordinary insect cells, yet they possess extremely strong penetrating and corrosive properties. They can attach to the piercing force of insect spikes and penetrate the gaps in thick armor.

It can also quickly release a special toxin after entering the target's body, while transmitting its own sensory signals back to the nest, directly constructing the complete internal structure of the target's body for the Zerg king.

The tremors of the battlefield once again drew Bai Fei's attention back to reality.

She looked up at the slowly approaching "Grey Mountain" war nest.

Tactical ideas took shape rapidly in her mind, with every detail precisely targeting Gray Mountain's defensive weaknesses.

"Casey, immediately retrieve the 'Armor-Eating Cells' from the incubation chamber. I will have all units attack its armor together, and then we'll inject the cells directly into its body."

As soon as Bai Fei gave the order, the formation of Bai Fei's army underwent a dramatic change.

The ranged units, originally scattered across the battlefield and responsible for flank reconnaissance and support, seemed to be drawn by an invisible force, quickly dispersing in all directions and directing all their attacks toward the "Grey Hill" war nest.

These ranged units come in various forms, some being heavy artillery Zerg carrying giant crystal cluster cannons, and others being flying Zerg that hover in the air with explosive pods loaded in their abdomens.

They are arranged in a staggered pattern, forming a long-range fire line that stretches for miles. The dense array of cannon muzzles, tentacles, and ammunition pods resembles a deadly forest poised to unleash its power, firmly locking onto "Gray Mountain".

"Fire!" Bai Fei's icy command instantly pierced through the clamor of the battlefield.

In an instant, the world changed color. Countless beams of energy in shades of blue, crimson, and dark purple erupted from the ranged weapons, pouring down like a torrential downpour, accompanied by a shrill whistling sound that tore through the air, as they hurtled toward "Gray Mountain".

Countless flying insects crashed down like meteors, trailing long plumes of black smoke, densely packed together, towards the steel fortress. Beams and projectiles instantly intertwined in the air, forming a massive net of fire that enveloped "Gray Mountain" completely, leaving no blind spots.

Boom! ...

The continuous, deafening roar was deafening.

The smoke and dust were instantly billowed up, forming a huge black column of smoke that shot straight into the sky.

The intense explosion illuminated the entire battlefield as if it were daytime. Even Bai Fei, thousands of meters away, could feel the massive energy flow rapidly passing over Casey's body in the Warbringer.

Bai Fei hovered in the air, her heterochromatic eyes fixed on the area completely shrouded in thick smoke, her fingertips slightly curled.

"Casey, analyze the status of 'Grey Hill' again."

"receive."

The War Mother Nest had barely finished speaking when Casey finished.

Amidst the thick, impenetrable smoke, dozens of crimson beams, hotter and thicker than before, suddenly erupted, shooting towards the long-range fire lines set up by Bai Fei!

The crimson beam moved at an extremely high speed, even exceeding the attack speed of the White Fey ranged units.

Almost instantly, it arrived at Bai Fei's long-range firing position.

The counterattack came too swiftly and too fiercely. Bai Fei's ranged units had no time to make any defensive response and could only endure the wrath of "Gray Mountain" in despair.

In just a moment, the long-range fire line stretching for miles was blasted to pieces, leaving only a few remote fire points that managed to survive.

"Your Majesty, five vulnerable areas have appeared on 'Gray Mountain's' surface, which can be injected with 'Armor-Eating Cells'."

Bai Fei's expression darkened slightly, and a cold killing intent flashed in her heterochromatic eyes.

She knew perfectly well that this was only the beginning of the battle.