One Piece: Peerless In Two Worlds

"I beg you, Lee, stop, please..."

Thousand of bodies lay on the ground, in a sect that called itself the Holy Light Sect was a demonic sect that worshipped the Demonic God.

Standing in front of the sect leader was none other than a boy with red hair, and no older than 10. A blank look on his face as he held his hands that were bloody.

Building a family with his friends, and the cool grandma but these people wanted to play a game of hide and seek. If you get caught, you will get tortured. Fearing for his life, he ran deep into the forest and stumbled upon a corpse.

The corpse had a scroll on it, reading it, the boy began to imagine himself doing the movements flawlessly in his mind as if he were the person who invented it. His green eyes suddenly became red as he began to feel some weird energy.

His muscles began to tear as he began to scream, making the animals run out of fear. The aura emitting off him was so overbearing, that the trees began squirming as if wanting to escape by pulling their roots.

The scroll fell to the side and the name was finally revealed...

It read: The Demonic Fist of Assassination...

The corpse's demonic energy began flowing into his veins, reconstructing them into the perfect vessel for The Demonic Fist of Assassination.

2 minutes went by as Lee stopped screaming as he felt comfortable. Feeling his body, he suddenly felt a sudden urge...

The urge to kill, to kill the ones who took Grandma, the ones who made his life a living hell. All this hatred turned into demonic energy, fueling it like gasoline to fire. In 10 minutes, Lee hunted the hunters and killed every single one.

Using only the first technique called: Demonic Knife, where the user can make a knife out of his hand using purely muscle control and technique.

Wiping his hand off the blood of the 100th member, Lee felt such a huge urge to kill more, and he felt it. The more he killed, the better he was becoming, the more skilled, the stronger. He even gained their techniques, it seems, his eyesight and brain could allow him to imitate and copy their moves.

"Healing Palm." Pointing a green palm into his body, he felt his demonic energy heal his injuries using his stamina. 

Running out of the forest, he began hunting the sect members who had a robe of the Holy Light Sect. In an hour, everyone was on the ground with no soul except the sect master who came back from a mission to an empty sect.

He tried to fight Lee but with every attack he used, Lee could imitate and use it better, and in twenty seconds, he was defeated with no arms or legs.

"Where are my friends?" asked Lee smiling as he began to charge a technique that he copied from the sect master called: Star Fist. 

Charging a lot of his energy into his fist, the sect master smirked and laughed. "We made sure they suffered, in their last moments, where did you think I was going?"

Hearing that, Lee stopped charging his attack as his heartbeat began to beat faster and faster. "You mean...you..."

Looking down at the sect master who was grinning viciously, "You have nobody now, just like how you came in this world, is how you will go out, all alone, haha!"

Gritting his teeth, Lee felt tears fall down his cheeks as he looked into the sky that was setting at this moment. "At least, you guys won't be able to see me like this..." Lee clenched his fist and used the second technique of the Demonic Fist: "Healing Fist."

The sect master was confused, "Healing Fist?"

10 hours later, he understood, why it was called healing fist. The sect master was a shadow of his former self as he lay with no limbs his eyes begging. Lee just kept pummeling him, the punches hurt but they healed as soon as they hurt but he kept punching over and over nonstop.

He thought he could withstand it until the second hour, his mind didn't know where he was, the punches were getting stronger as if it was feeding off his hatred. Looking into those red eyes, the sect master was becoming filled with nothing but dread.

This is how we are in our current scene...

"Please, Lee..." The sect master muttered as he saw Lee stop for a second.

Feeling a bit out of stamina and demonic energy, he wiped his sweat and looked down. "Carry this lesson to your next life, always be ready for karma."

Sharpening his hands, he slashed his entire body into half as the famous sect master died as well as the whole sect.

The next months were chaos as nobody could find who destroyed the entire sect of the Holy Lights. Lee, already in clean and nice clothes, was watching as the guards pulled away the members he cleaned up.

Sighing, Lee looked at his hands, he has such power, but should he use it...

20 years later...

"LEE! You fool, haha!" said an old man with a group of old people who pulled out their spiritual weapons that were all grade 7s.

Grade 7 weapons can cut through dimensions as well as souls, they were the rarest weapons in all of existence. Only 7 weapons were created, and they were given to these old people who were the sect masters of the strongest sect called the Heavenly Sect.

Holding his left arm, he looked up at the 7 elders of the Heavenly Sect. He wanted peace after the war, but who knew, the 7 elders would use this meeting to end him once and for all. They even poisoned him.

Expelling the poison, consumed half of his stamina, "That poison is the famous 9 poison?!" said Lee glaring at the elders.

"I thought it would paralyze you so we can just kill you easily, but I guess it was wishful thinking," said an elder brandishing two kunai.

Lee entered his rage mode and his energy began to envelop the entire realm, "Fine, you don't want peace, then f*ck it, I am gonna crash out!"

Using the final move of the Demonic Fist of Assassination called: Fist of the Demonic Void. Enveloping his fist in demonic energy, he began to pour void energy into it making it unstable as his body shook in pain.

"Who knew, he could master the final move, haha!"

"He can even control the void energy that can destroy all things, haha, but it seems, he hasn't mastered it yet."

Feeling the grip on the void energy slip, Lee gritted his teeth and began to emit void pulses, "Is he dumb?! He is tryna force the law of void to comply with his energy!?"

In just a millisecond, Lee felt his soul look into the void and the void looked back, a mouth appeared and spoke something but Lee didn't hear anything until he felt a bunch of voices in his head. 

One sentence ran out, "The void, accepts you, but you have to sacrifice your martial arts, are you willing."

"My country...is depending on me."

The void smirked and spoke, "Haha! To think, a demonic cultivator is protecting humanity."

"I never said I was a demonic cultivator," said Lee narrowing his eyes at the void.

Chuckling, the void spoke again, "Fine, since you want my power, then have it, but don't die, haha."

Feeling the void energy enter his body, his demonic energy dissipated as his body reinforced just like back in the day.

This all happened in a split second, Lee burst out with an aura of nothing but void. The elders were shocked as their weapons began croaking. "Impossible! How...did he, give up all of his martial arts?!"

"WHAT?!"

Everyone knew how amazing Lee was, he had over 100 martial arts techniques and moves. Each one was devastating since he used his demonic energy for all of the attacks. "You fool, if I had your talent, I would not throw it all away just for some void energy you cannot control!"

Lee didn't hear them as he connected with the void energy and casually punched his fist at the elders as they all felt danger, then suddenly an elder to the left's head evaporated. The other elders gulped, "So fast..."

Lee moves with void speed that voids even the equation of the speed, allowing instant movement. Appearing in front of the elders, they all attacked using their weapons but they all cracked and began void.

"You sacrificed not being able to use martial arts in the future just to attain this power!?" said the elders seeing his life span and life force disintegrate due to the power. 

Lee couldn't even speak so he could only do the one thing he had known to do all his life. Throwing his fist at the elders, he used the only technique he knew in void martial arts. Whispering slowly, he said, "Void Expansion, Infinite Void."

Once his hand opened, a domain entrapped all of them as they stood in the void. The elders all had sweat on their heads, "To think, he can open a domain using the law of void."

"I will see you all on the other side guys," said the elder sitting down.

Nodding, they all sat down as the void began to absorb all of them into the void. Lee then collapsed the domain and fell onto the ground as his body began to slowly rot away into dust.

"I avenged you, mom."

Closing his eyes, he saw the eyes of the Void and smirked, "You are the first mortal to successfully use one of my techniques, haha!"

"I guess, I will enter the void, huh?"

The void smirked and a snap was heard as Lee began to regenerate but his body was gone. His red hair flowed and spiked down his back. "You are interesting, I will send you to another world, so you can protect your loved ones again."

"What? I thought I was dead forever?"

"I like you, pause, I meant, I like watching your life, it was so fun."

Lee sighed, "So, you like me fighting everyone and watching my family die over and over?"

"I am the Void, I don't have the morals of humans."

"True, so, what are you gonna do to me?"

The Void smirked with his sharp teeth and said, "You always wanted to go to the One Piece world right? Ryan..."

"You...know my past life?"

"Ryan, you fought in World War Two and died protecting your squad leader in an ambush."

Lee sighed once again, "You can read my past lives from my soul huh."

"You are smart, haha! Yes, but back to the main point." The void clears his throat, how does that work but okay. "I will send you to One Piece, and you can live how you like. Once you die, I will reunite you with your family in heaven."

Lee's eyes go wide, "Really? They are in heaven?"

"Yes. They also say, to live your life and don't cause too much trouble."

"Grandma always said that when I went to buy medicine for her." Wiping his tears, Lee cleared his heart and nodded, "I want to go."

A strange light enveloped Lee as he got sent into the world of the Pirate and Marines...