This is my own version of how Zarc was defeated the first time and split into his four selves, using an OC of my own creation. I might do more chapters on this with my OC in the main plot line of arc v with Yuya and the others if I'm feeling motivated.
Zarc rampaged and the world burned. The Supreme King Dragon fired blast after blast of destructive energy, cleaving and burning through the city. Buildings crumbled and monuments fell before the mighty dragon.
"Come!" Zarc threw back his head and laughed from his perch on the gigantic dragon. "Come witness the world's greatest entertainment!"
A razor edged wing sliced through a building. Glass shattered and rained down across the street.
"Watch me!" he called, as the city crumbled behind him. "I have become more powerful than anyone ever had before! I am the greatest duelist to ever exist. Bask in my glory!"
The streets remained silent, save for shattering of glass and the crumbling of stone.
Zarc frowned to himself. Where are the cheers? The screams of admiration? Are they not entertained?
"You wanted this!" he screamed into the sky. "You wanted power and I have given it to you! I am the strongest in the world!"
His words rang out into darkness. A heavy, empty silence followed.
"Come, come! Witness my entertainment!"
Still nothing.
"Are you afraid?" he roared. "Afraid that you are weaker than me? That I am the strongest?"
Yes, yes! That was it! They are afraid. They know that they are weak!
"You are weak, but I am strong! I am the most powerful being in existence! Did you not want this?"
They had wanted power! Now he was more powerful than ever! Why are they not happy?
"You're weak!" he yelled. "Weak and afraid!"
He smashed a statue in rage. Chips of stone flew in all directions.
"If you are weak then I'll destroy you!" he screamed. "Weaklings don't deserve to see my power!"
Blasts of energy shattered houses as he raged.
"I'll destroy you! I'll destroy you all! I am the strongest!"
"Zarc?"
Zarc turned. He stared down at the red haired girl from his perch on the dragon.
"What have you become?" questioned Ray.
"Don't you understand, Ray?" he said, in a softer tone. "This is want people want. They want power. Power is the greatest entertainment."
"No Zarc!" Tears streamed down Ray's face as she faced her childhood friend. "This isn't entertainment! Entertainment makes people cheer! It makes them happy!"
"They don't cheer because they are afraid!" yelled Zarc, his voice getting louder. "They're weak!"
"No, you're weak." A man wearing a jagged cloak stepped up beside Ray. Piercing blue eyes glinted beneath his hood. "You've given in to their demands. You've let them turn you into a monster. You've forgotten what real entertainment is."
"Power is entertainment! I am the strongest there is!"
"Don't you remember, Zarc?" asked the cloaked man, pulling back his hood, a boy about the same age as Ray. His blue eyes glinted and a hopeful smile played on his lips. "The duels we had here? In the park? You always put on a show for the passers-by. What happened to that Zarc?"
"Dueling…" Zarc breathed. "The park."
"Yes," said Ray. "You remember the fun we had? We were friends!" Ray implored, the tears dripping freely.
"You know this isn't real entertainment," said the boy in the cloak. "Your heart is swinging."
He pulled a pendant from inside his jacket. A blue crystal glowed as the pendulum swung from side to side.
"Come back Zarc!" pleaded Ray. "We know you'll make the right choice."
"I remember…" murmured Zarc. "The fun we had. We always put on a show. But back then…"
Ray looked up at Zarc through her teary eyes with a glimmer of hope.
The cloaked boy grinned, reaching out to hand the pendant to Zarc.
The Supreme Dragon King knelt, reaching out to grab the pendant. He took it, and the small blue crystal glowed in his palm.
"Back then…" he muttered.
"Entertainment isn't about power," said the boy. "It's about making the crowd smile. It doesn't matter if you're strong or weak."
"Back then…" Zarc closed his hand around the pendant. "Back then I was weak!"
He threw the pendant aside, rising up to his full height. "Power is everything! I have no need for weaklings like you!"
"Zarc!" cried Ray. "No!"
Zarc activated his duel disk. "I am the most powerful! You're just weaklings!"
The cloaked boy nodded to Ray. They both activated their duel disks, and stood facing the Supreme King.
"Don't you remember, Zarc?" the boy's voice was sad. "Why can't we go back to that?"
"You're weak!" screamed Zarc. "I am the strongest! Hindrances like you need to be destroyed."
The boy gritted his teeth. "I'll make you remember! I set the Pendulum Scale!"
The crystal pendant glowed with a blinding light as it flew from across the courtyard to the boy's hand. Shining, blue light engulfed the area as his monster appeared.
"Ray," he said solemnly. "You must go forward! Do not falter!"
Ray nodded tearfully.
The boy turned to Zarc. "Zarc, you were my greatest friend. I am truly sorry."
Tears streamed down the boy's face as he spoke. "By tributing my monster, I set four cards from my deck to Ray's field."
His pendulum-summoned monster disappeared and four facedown cards appeared.
"No!" yelled Ray. "You can't do this! We'll beat him together!"
The boy looked at her with tear streaked eyes, and smiled. "This is the only way. See you 'round Ray." He gave her a wave before turning back to Zarc. "Because of this effect, I take 1000 damage for each card I set. Since I set four cards, that's 4000 damage."
The boy gave one last smile before an explosion set him flying backwards. He landed in a pile of rubble and didn't move.
Zarc threw back his head and laughed. "How weak."
Ray screamed. The boy's words echoed in her head. Go forward. Do not falter.
"I activate the spell card En Flowers!" she yelled.
"No! Ray! Don't do this!" Her father, Leo Akaba appeared from behind a wall of rubble. His face was bloody and streaked with dust. "You know what will happen if you use them. Let do it."
"No, Dad," choked Ray. "I can't let you."
She turned to Zarc. "I activate En Birds and En Winds!" she yelled, flipping two more cards face-up.
"No!" screamed Zarc. "What are you doing?! I am the strongest! You can't hope to defeat me!"
"Please, Ray," implored Leo. "Don't do this." He stood behind her in shock.
"Dad?" Ray looked her father in the eyes. "I love you."
"Ray…" her father stammered, choking on his tears.
She looked at Zarc with her teary, bloody eyes. "I love you too," she whispered, flipping En Moon face-up.
"Nooo!" Zarc screamed his dragon began to crack apart, light spilling from inside. "This is impossible! I am all-powerful! I'm"—
Zarc screamed as four projections of himself appeared from his body. Ray stood, shaking and weeping as the same happened.
Then the blinding light engulfed the world and everything was gone.
I didn't give my OC a name, partly because I felt like it's not important, and also because I think it would make for a better reveal when he meets Yuya and the gang if I write more chapters.
I hope I did a good job writing Zarc. It was pretty difficult to portray how he wanted to destroy the world, but also entertain people, but I think I got it.