One Piece: The Strongest Experimental Subject!

February 30, 1518, Post-Great Pirate Era.

New World – Punk Hazard

"Caesar, you bastard! You secretly tampered with the bloodline factor of Experiment 88, and now you're conducting this dangerous gas experiment on the island?!"

Dr. Vegapunk's voice, cold and cutting, echoed through the research facility. His bulbous head gleamed under the sterile laboratory lights as his long tongue flicked in frustration.

"You are nothing but a reckless, inhuman scum!"

Across the room, Caesar Clown floated smugly, his curled horns gleaming. His confidence faltered momentarily as Vegapunk's words struck a nerve.

"It's over!" Vegapunk declared, voice shaking with restrained fury. "Experiment 88 was the pinnacle of the World Government's biological experiments. And now, thanks to you, he's dead! Do you understand what you've done?!"

Around the room, the other scientists whispered nervously, shooting Caesar accusatory glares. The fear of the World Government's wrath hung heavy in the air. To cross their benefactors was to invite death—not just for themselves, but for their families.

"Don't look at me like that!" Caesar snapped defensively, sweat beading on his brow. "How was I supposed to know he'd die this time? The previous experiments went fine! This... this was an accident!"

"You always say that," Vegapunk growled, his patience unraveling. "This time, Caesar, there are consequences. I'll deal with you after we stop your damn 'Slime' experiment. Shut it down now!"

Caesar sneered. "Shut it down? Do you have any idea how revolutionary this gas experiment is?! You just don't understand my genius!"

"It's reckless and will cost lives!"

"Tch, so what? If people die, they die. Only fools get caught in the crossfire!"

"You vile—!" Vegapunk's fury boiled over. He turned to the naval officers standing guard. "Rear Admirals, arrest this lunatic! He has no place here anymore!"

The officers, clad in seastone-reinforced armor, moved without hesitation, chains in hand.

"You can't do this!" Caesar screamed as the guards advanced. His face twisted with rage and humiliation. "You think you're better than me, Vegapunk?! You always think you're better than me!"

His hand darted to a control panel. Before anyone could stop him, he slammed his palm onto a red button.

The room froze in collective horror as a low rumble began beneath their feet.

"No," Vegapunk whispered.

A deafening explosion rocked the island, shattering windows and hurling debris in every direction. A massive plume of purple gas erupted into the sky, spreading rapidly. Two of Punk Hazard's three research facilities were obliterated in an instant.

---

In the Chaos

Deep within one of the remaining labs, a man floated lifelessly in a glass chamber. His black hair drifted in the nutrient solution, his body riddled with faint scars. The label on the chamber read: Experiment 88.

The explosion rattled the room. The chamber cracked, and alarms blared as sparks flew from overloaded machinery.

Inside, the man stirred. His heart, long dormant, gave a faint, sluggish beat. His fingers twitched, and his eyes fluttered open—one a blazing gold, the other pitch black.

"It hurts... it hurts so much."

With a low growl, the man clenched his fists. The veins in his arms pulsed, glowing faintly as a violet hue spread across his body. Flames erupted around him, burning hot enough to boil the liquid in the tank.

With a roar, he surged forward, shattering the glass.

---

Panic in the Facility

Guards and researchers scrambled through the hallways, choking on the spreading poison gas. The sharp blare of evacuation alarms mixed with the distant screams of the dying.

Amid the chaos, a steel door flew off its hinges, slamming into a fleeing group. Blood sprayed the walls, and a hulking figure emerged from the smoke.

Renji stepped forward, his eyes blazing—one gold, one bloodshot red. His bare chest heaved, streaked with violet markings that pulsed with unnatural energy.

A terrified researcher, half-crushed by the door, gasped as he recognized the man. "Experiment 88... you're alive?"

Renji's gaze locked onto him, cold and unyielding. Without a word, he grabbed the man by the throat and snapped his neck with a sickening crack.

"You're all going to regret this," Renji muttered darkly, his voice dripping with venom.

As he stalked down the hallway, the scattered research documents fluttered to the ground, revealing his history:

Experiment 88 – Name: Renji. Male, Age: 21.

Phase 1: Lunarian Lineage Factor Experiment – Success.

Phase 2: Ancient Giant Lineage Factor Experiment – Partial Success.

Phase 3: Laser Weaponry Integration – Success.

Phase 4: Toxicity and Invisibility Factor Experiments – Failure.

Project Overseers: Dr. Vegapunk and Caesar Clown.

Renji paused as another wave of memories surged through him, stoking the flames of his rage.

"They turned me into this... but they'll wish they hadn't."

With a feral snarl, he stormed toward the island's exit, leaving a trail of destruction in his wake.