Doomsday: with unlimited warehouse system

"Meow~" Cola called out to David and then turned to face the intelligent zombie. Suddenly, a chilling beam of light emitted from its pair of blue eyes, which left David even more confused.

As David observed the overwhelming killing intent emanating from Cola's body, he felt a sense of familiarity with this aura. It seemed like something he had encountered in his past life. Before David could think further, Cola let out a deep roar and swiftly pounced on the intelligent zombie. Its speed was twice that of Shadow, and it even left a trail behind in mid-air. The intelligent zombie, having noticed Cola, turned its rotted and disfigured face towards it and stared intensely, as if it had encountered a formidable opponent.

"Meow!" Cola extended its claws in mid-air, and several steel-like spikes instantly emerged from its palms. At the same time, cold light appeared, and its claws carried a thick killing intent.

"What's going on? How can Cola be so strong?" David stood still, astonished by Cola's transformation. He had known that Cola was keeping secrets from him, but he didn't expect it to be this fierce. Its entire presence even surpassed Shadow's. Nervously, he continued to watch Cola's actions. Cola swiftly landed on the intelligent zombie's body, and its spike-like claws immediately pierced into it.

"Scratch!" A piercing friction sound echoed, and David quickly focused his gaze. He saw that Cola had torn open several wounds on the intelligent zombie's brown, steel-like skin. Black blood was oozing out of the wounds.

The intelligent zombie seemed to feel pain and continuously emitted angry sounds. Then, it extended its palm and swung it towards Cola's body. However, after successfully attacking, Cola did not pursue further. Instead, it lightly leaped into mid-air, rendering the intelligent zombie's attack instantly ineffective.

The intelligent zombie seemed to have never suffered such a big loss before. Being bullied by a little cat was an unbearable humiliation. It extended its palm to grab Cola, who was suspended in mid-air, attempting to crush it. But how could Cola regard it seriously?

"Meow!" Witnessing this, Cola let out another low roar, and its fur suddenly stood on end, as if it had exploded. Its entire body rapidly expanded at a visible speed! The muscles on its limbs swelled like coiling dragons. In just a few dozen seconds, the originally petite Cola had become even larger than Shadow! Combined with the terrifying muscles on its limbs, it now looked like a mutated tiger, emitting an even stronger killing intent!

Cola stared at the extended hand of the intelligent zombie and continuously growled. Just as the zombie's hand was about to grab Cola, without hesitation, Cola extended its claws and fiercely slapped it!

"Boom!" A loud roar resounded as Cola forcibly broke the intelligent zombie's arm. Due to the excessive force, the entire body of the intelligent zombie was slapped against the wall by Cola. The red brick wall instantly formed a large hole, and debris continuously fell onto the intelligent zombie.

Seeing this slap from Cola, David couldn't help but utter a horrified voice. "This strength... even a mutated water buffalo wouldn't be able to withstand it!"

Monica had long been shocked and sat on the ground with her mouth wide open. She couldn't believe that a small and delicate cat could be so terrifying, appearing like a demon king.

Cola's slap had immense force. After a while, the intelligent zombie slowly stood up from the rubble. It had lost one arm and had many cracks in its defensive skin. The intelligent zombie stared fiercely at Cola, let out a roar.

Cola's palm strike was extremely powerful. After a while, the intelligent zombie slowly stood up from the rubble. By now, it had lost an arm and its defensive skin was cracked in many places. The intelligent zombie stared at Cola with anger and roared, then swiftly charged towards Cola. At the same time, its nails on the palm grew out one by one, aiming for Cola's chest. Just as it was about to reach Cola, he instantly appeared behind it and swung his fist towards its back.

"Bang!" Cola didn't give the intelligent zombie any chance to react. His punch landed directly on its back, causing the zombie's mouth to open wide in pain as its body plummeted to the ground like a runaway kite.

Seeing the opportunity, David knew it was time to act. He opened a spatial portal and teleported next to the intelligent zombie, raising his alloy dagger and thrusting it fiercely into its mouth.

Instantly, the sound of agonizing moans filled the air. The intelligent zombie attempted to struggle, but David held the alloy dagger in its mouth and gave it a 360-degree rotation, instantly blending its head into a pool of blood.

Now, the intelligent zombie couldn't produce any sound from its mouth, and its struggling body suddenly fell silent. After confirming its complete death, David withdrew the alloy dagger and shook off the black bloodstains. He let out a long sigh of relief. Finally, with the combined effort of him and Cola, they killed the intelligent zombie. To be precise, it was Cola who delivered the fatal blow.

Given Cola's current combat abilities, dealing with the intelligent zombie was an easy task. David just didn't want to prolong the battle and seized the opportunity to kill it in one strike. At this moment, Cola returned to his petite appearance.

"Meow~" Cola let out a meow towards David as if nothing had happened, completely different from the intense killing aura it had moments ago.

This left Monica bewildered as she stared at Cola. If you say it's cute, it just smacked an intelligent zombie with one paw. If you say it's not cute, well, it's just a little kitty! So, watching Cola stroll around, Monica instantly fell in love. Having such a little companion by her side meant not only being able to cuddle with it daily but also having a fighter who could take on ten enemies at once. Who wouldn't love that?

So Monica looked at David with envy, hoping he would let her enjoy spending a couple of days cuddling with Cola. At that moment, Cola slowly walked towards David and let out a meow before heading straight to the side of Little Black. Little Black, who was vaguely waking up from unconsciousness, still hadn't opened its eyes, likely due to its injuries.

Approaching Little Black, Cola looked at it with a disdainful gaze. "Meow!" Then it extended its paw and slapped Little Black's head. Only then did Little Black slowly open its eyes. Seeing Cola's contemptuous expression, Little Black seemed to understand something and lowered its head in a submissive manner, afraid to look at Cola.

Meanwhile, Cola continued to stare at it, as if saying, "Is this all the skill you have? How embarrassing!"