Regressed with Omnipotent AI on Zombie Apocalypse(FF)

Zack raised his electromagnetic whip. His tone icy cold. "A devil!? After everything that you have done!? Threatening me to take over my tech, launching nuke to my home. And you know the best what you have done here!" 

With a single, calculated swing, he cut through the row of soldiers lined up against the wall. Their bodies fell in halves, their wounds charred and bloodless. "I curse—" Kshatti's words were abruptly silenced. His body went numb as he felt a strange weightlessness. He saw his own neck slip from his shoulders, the world spinning wildly before his severed head hit the ground with a dull thud.

At the same time, large bases equipped with reconnaissance satellites around the world were monitoring the battle at Caribbean base with growing alarm. This wasn't just a skirmish—it was the first human-versus-human war since the apocalypse began. The Caribbean base, with all its resources and manpower, had been utterly annihilated. Its soldiers and leaders were massacred, its defenses crushed. It was a one-sided slaughter, leaving no room for retaliation.

In the frozen wasteland of Siberia, inside a shadowy, high-security base, a man draped in a heavy cloak stood silently. The only light in the room came from a large screen displaying the grim footage of the Guman battle. "Black Hand, is this the man who attacked your unit?" a synthesized voice asked, cutting through the darkness. The voice was eerily neutral, its tone impossible to place as male or female.

"Yes," Black Hand replied, his voice dripping with cold hatred.

The voice paused briefly. "The headquarters will provide you with new weapons and technology. Do you require anything else?"

"I want command of Team Moon Shadow," Black Hand said, his tone unwavering.

Team Moon Shadow—a legendary three-person team. Its captain, Lillian, known by the codename Moonshadow, and the other two members, had all been spotted in NYC at some point. The burly fighter, "Bear," and the deadly swordsman, "Samurai," completed the trio.

"Granted," the voice replied after a moment. "But remember, failure is not an option. If you disappoint the headquarters again, you know the consequences."

As soon as the words faded, Black Hand doubled over, clutching the wall for support. His body trembled violently, wracked by an invisible pain so excruciating it left him gasping for breath. "Rest assured, I won't fail this time," Black Hand rasped through gritted teeth, forcing the words out despite the torment.

"See that you don't," the synthesized voice warned before vanishing.

Left alone in the darkness, Black Hand straightened slowly, his scarlet eyes glowing beneath the shadow of his hood. They gleamed with the savage hunger of a beast poised to strike. "I will kill you," he snarled, his voice a promise of vengeance.

Meanwhile, Zack hovered high above the ruins of Caribbean base, the wings of his suit cutting a sharp silhouette against the smoky sky. Below, the scene was a vision of hell—zombies swarming the base. "How many are left?" Zack asked, his tone detached.

Ego, his AI companion, responded immediately. "Over ten thousand survivors remain, sir. The mechanical beasts were programmed to spare most of the capable young adults, but I cannot make sure have they consumed human or not."

Zack observed the chaos below for another moment, calculating his next move. Despite his hate for what they did, he needed to balance survival and his own feeling—particularly with the big problem he have now the gender imbalance at his territory. 

His eyes narrowed. "Bring them in." The women would help balance the ratio of men to women. The men would provide manpower. This is the apocalypse, even with all the tech he have, he cannot take care all of them. He cannot create food and resource from nothing.

"Sir, the Avalon can't transport this many people," Ego, his AI companion, reminded him with its usual calm tone.

"Then we'll take the river," Zack replied without missing a beat. The Hudson River, the lifeblood of the New York City region, was the perfect solution. Flowing down to the Atlantic, it offered a direct route to the Caribbean. A cargo ship could easily solve their logistical problem.

"Understood. The robotic dogs are already selecting candidates," Ego responded..

The massacre at the Caribbean base was nearly over. The mechanical beasts herded over 10,000 survivors onto the airport runway. Cries and shouts echoed through the air, a symphony of despair. Meanwhile, zombies swarmed what used to be the survivors' living quarters, now reduced to a feeding ground. As the undead tried to converge on the runway, three Avalons circling overhead dropped incendiary bombs, creating a wall of fire that halted their advance.

From nearby buildings, Zack's spider drones acted as sentry guns, spitting fire to suppress the zombies. On the ground, mechanical dogs scanned the panicked crowd , separating individuals based on physical health. When the sorting was complete, 1,100 womens and 800 men were isolated from the rest. They were marched and loaded onto an intact cargo ship.

"Let the mechanical dogs board first," Zack ordered as the last survivors were shoved onboard.

With a loud, low whistle, the massive freighter pushed away from the dock and began its journey down the Hudson River. Back at the base, Annie watched the chaos from the seat of her Tarantula. "Brother, what about the rest of them?" she asked hesitantly, her voice filled with unease.

"You go back first. I'll handle it," Zack replied, his voice devoid of emotion.

"But, brother…"

"Go," Zack said firmly. Reluctantly, Annie climbed aboard the Avalon. One by one, the spider drones returned to the aircraft at Zack's command. The Avalon ascended into the sky, carrying Annie away from the Caribbean base.

Now only Zack and his subordinate Ava remained, hovering above the runway. "You know why I kept you here, don't you?" Zack asked, his tone icy.

"Yes, I understand," Ava replied, her face conflicted.

"Good. It's your decision. Do what you want, but don't report back to me. Whatever happens, I won't care." Without waiting for a response, Zack activated his thrusters, launching himself into the sky and vanishing into the clouds.

On the ground, thousands of survivors, left to their fate, erupted into chaos. Some screamed, others begged for mercy, and a few, driven mad by fear, turned on each other. Gunshots rang out as panic spread like wildfire. Unknown to them, the fire outside the perimeter had died down, and the zombies were closing in.

"Do I really have to choose?" Ava murmured to herself, her hand hovering over the red button of a remote detonator. Memories of her fallen comrades flashed through his mind: Antonny, Steve,—all of them slaughtered by these very people. Their faces, their final moments, played out like a haunting slideshow. 'It's not like I have any option..' Her hesitation melted away as rage and sorrow filled her chest. her hand slammed down on the button. Even if she choose to spare them what await them is just hellish experience, they will turn on each other becoming less than human.

Miles away, Zack hovered mid-air, watching the horizon. A bright, mushroom-shaped fireball rose from the Caribbean base, its shockwave pushing away the clouds to reveal a pristine blue sky.