I am in Black Clover?!!!😱😱😱😱(Oc story)

Cocytus vs Kei

Third OV

Kei and her companions were walking through the 3rd level. While, Kei thinking about something.

'Its seems look really like... a crossover here... all the names and their abilities, whatever! I feel like I'm in crossover fanfiction...' She sighed.

"Now here we are in 3rd level, you need to be careful Kei-sama" Hakuro said.

"Kurama, Sesshomaru, Hakuro and Musika... I need your support when we reached the last level but in 3rd to 6th, you need to contain your energy for the last level" Kei said seriously.

They looked at their master.... she is serious.

"Hai." They only said.

Until they reached the door of the 3rd level. They entered the level..

It was a dome arena for gladiators.

Kei went into the middle of the arena and spoke loudly.

"I, Kate Lene Ureka 'De Carpio' Yumanaka... I challenge you, the Guardian of this floor!" Kei said.

"I, Cocytus, accept the challenge!" A voice rang inside of the level.

Then a ground shook from someone landed down. The dust gone and saw a monster with strong armored shell skin as it colored sky-blue, his back has spiky icicles, long tail and holding an Axe scythe.

"So you're the one who defeated the twin devils of 1st and 2nd floors. Let's see the strength of your magic" Cocytus said.

"Of Course. Requip! Lightning Goddess Armor!" Her body glowed and changed into her armor.

"That's one of the new Magic I ever saw" Cocytus went on his fighting stance.

"Thanks" she smirked and went on the fighting stance.

Then, the two clashes their weapons in such strong attacks. Cocytus shocked how strong this girl was.

'I might not get my defense down' He thought.

He dodge her slash and chanted a magic spell.

"Ice storm!" A icicle spears formed into a huge storm of ice spears and attacked her.

"Lightning strike bolts!" Her bladed spear slashes in four times and huge black lightning destroy his attack in no time.

"A black lightning! 13th tier lightning magic type!" Cocytus shocked. Yet, he countered her by one of his strong magic spells.

"Ice Shattering Landscape!" An Ice beam filled with chunks of Ice attacked Kei. Kei smirked and two Magic circles appeared infront of her.

"Divine Protection! Inferiors' Fire Field!" Two above 15th tier magic combined and reflected as it dispersed the enemy's attack.

"Two Magic types! Impossible.." Cocytus almost smirked. Yet Kei floated above and launching a final attack.

"Death Lightning Storm!" Kei said and huge black circle appeared above.

A beam of black lightning strike down very fast not even Cocytus dodged it easily. He was strike directly of 15th tier magic.

The explosion filled the room making Zack, Mare and Karen paled in white while her demon beasts and supreme superior spirit smirked and whistled.

"That's we talking a killer move" Kurama smirked.

'This is the person in prophecy! She is a monster!' Zack gulped and Karen with Mare were both shivering in fear.

The smoke is gone, Cocytus was in the crater and barely stood. He didn't know that he underestimated his own opponent.

"You're good but I will get serious now-ardh!" He felt his stomach was punched by thousand tons but Kei gave him a counter punch like Saitama's ordinary slap.

He been threw om the other side and the wall destroyed by impact. She didn't gave him a time to recover.

"Gomenasai, but I need to finish this mission very fast so I could go back to my friend and help him" Kei fist smoking because of how strong the punch.

The force shook the whole temple of how powerful it was.

Cocytus' insect eyes spinning and knocked out.

'She is so strong....' he lastly thought.

"It seems I won" Kei cracked her shoulder.

"My new master is real damn monster" Zack whispered.

"Kei-sama is really this powerful" Mare asked on Sesshomaru.

"You will be overwhelmed when she saw her mana power. It's godly amount and never-ending mana that we feel when she tamed us" Sesshomaru smiled.

Mare and Karen smiled weakly and sweating bullets of what is the future will bring with this new master.

Timeskip...😐😐😐😐😐😐😐😐😐😐

Kei waited Cocytus to be awake and his eyes opened. Kei crossed her arms under her chests.

"(Cough), You're awake now, where is the next floor?" She asked and Cocytus stood up.

"I will guide you to the next level but I want you to kill me, is one of the rules" Cocytus said making Kei dumbfounded.

'This man really a warrior's pride' Kei thought.

"Nope. I won't kill you because you will be my one of the slave companions. You might help when incomes in the near future. I won't ask what is your sin... but I want to show you how the world is nice and to live with it" Kei turned around and Cocytus shocked about her decision. The gentle aura she had and the ominous magic that she is containing in her middle of magic pool the he felt when she punched him.

"If you don't like to come along-" Kei was cut off.

"I will follow my new master where ever you go" he declared.

"Okey, so let's go" Kei smiled.

"Hai" Cocytus saluted.

Time skip... Scene Change😋😋😋😋

Cocytus showed them the door, it's red and black colored door. Kei could feel how dark the level it is.

"Shalltear-san is one of the short tempered devils in the temple so be careful Kei-sama. She like tortures and blood bath because she is a vampire" Cocytus said.

"I know, Mare and Karen warned me already" Kei said.

"Let go into" Zack said.

They entered the floor. The scenery was hall room filled with different tortures and beautiful maids?

"Welcome to my sanctuary... you're such a beautiful girl..."they saw a paled white skin and white haired girl in Gothic Lolita dress with her umbrella yet her eyes where only blood color.

"That is Shalltear Bloodfallen, vampire devil" Cocytus said.