Author's Note: This is my newest story, The Anti Dragon Emperor, I really enjoyed the Black Clover manga series and after seeing the similarities to Fairy Tail it gave me the idea for this story.

I don't own Black Clover or Fairy Tail.

"..." Character P.O.V.

'...' Character thought

"..." Character Spells

'...' Over-voice

In this story Asta will be slightly OP and smarter than in the manga series. There will also be some different element crossovers as well but not much.

Chapter 1: The Boy's Vow

Many years ago, humanity was about to be completely wiped out by a three-eyed demon. But a single mage arose and saved all humanity. People would later call him the Magic Emperor.

Many generations later, the Magic Emperor becomes a title bestowed to a mage elected by the people with a duty to protect the Clover Kingdom from any harm.

In the Forsaken Realm, a small village named Hage has just finished a ceremony of presenting its villagers youngsters of 15 years old with grimoires where an orphan boy named Yuno received a grimoire that has a four-leaf clover at the cover while his foster brother Asta doesn't receive one due to his lack of magical power.

In the evening, Asta is still left shaken form the ceremony and is hanging out in the skull of the demon that the first Magic Emperor had slain.

'I knew that I had no magic powers within me, but I didn't think it was so bad that I wouldn't get a grimoire.' Asta thought as he hangs upside down from a tree branch growing inside the demon skull. 'I guess I just can't, huh?' He thought.

[Flashback]

"Let's see which one of us will be the first to be the Magic Emperor." A young Asta declares to a young Yuno as the fist bump each other.

[Fast-Forward to earlier that day]

"Ridiculous" Yuno says walking away after receiving his grimoire and ignoring Asta's declaration of rivalry.

[End Flashback]

'I really let him down, didn't I?' Asta thought. "I bet you he doesn't even remember." He says to himself. 'Our agreement.' He thought remembering the bet they made when they were younger.

Asta, never one to give up, inhales deeply.

"Like hell I'm giving up! Fuah ha ha ha ha! Don't you dare look down on me, fate! Wait for me Yuno! I'll be right there! Whether it take me a year or 2 years, I'll keep trying until I get a grimoire!" Asta screams as he jumped from the tree branch and lands on a boulder but as he landed, the rock slightly shifted to the right. "What the…?" He asks as he gets off the boulder.

Asta, using the strength he gained from years of training due to not having any magic power, manages to push the boulder out of the way to reveal a hidden staircase.

"Whoa! Did anyone know this was here?" Asta wonders as he heads down the staircase.

As Asta heads further down the stairs he comes to room that is suddenly lit up by torches to reveal two pedestals, each with a grimoire on it. Asta couldn't explain it but he felt as if these grimoires were calling to him and makes his way over to them. Asta gets a better look at the two grimoires and sees the one on the left is pristine and covered in what look to be white dragon scales, a white fire-leaf clover insignia at the center of its front cover that can hardly be seen while the one on the right is tattered and covered in dirt, a black five-leaf clover insignia at the center of its front cover which can hardly be seen due to the dirt covering it. As Asta reaches out and touches the two grimoires at the same time something strange happens, a large magic circle with what looks like a dragon in the center appears underneath him.

"A dragon?" Asta questions but then the magic circle causing something to awaken within him. "What's this? This power flowing up from deep within me. This huge flow of energy. Is this…magical power? Ha ha ha ha, this is amazing!" He yells and unleashes a huge dragon like roar.

The two grimoires then fire beams of energy into Asta's head filling him with names and knowledge that they held and causing him to grow ten centimeters in height, but it went unnoticed by him.

"So, this grimoire's magic is called Dragon Slayer Magic that transformers the user's physical body into a dragon." Asta says looking at the white grimoire in his left hand. "And this grimoire's magic is called Anti-Magic that can nullify other magic." He says looking at the dirty, tattered grimoire in his right hand. "But how can I use Anti-Magic if I have magic? I mean it's not like I can turn if off." He says and suddenly all the magic power he felt coming from him disappeared. "What the…?" He asks completely shocked and the disappearance of his new magical power but then realizes something. 'Wait, maybe if I…' He thought as his magical power returns in full. "Amazing. So not only do I have two grimoires, but they've given me the ability to cancel out my magic power and reactivate it at will." He says with a huge smile.

As Asta was about to celebrate, thanks to his new enhanced abilities he then hears a scream from the town and could smell that Yuno was there with three other scents he didn't know. He gathered up his grimoires and quickly runs to investigate. Once he was nearing where the scream originated from and was nearing a cliff, he heard a conversation beginning.

"Who the hell…are you?" Yuno asks restrained by iron chains made of magic.

"Kuh kuh kuh. Not too long ago, I was a Magic Knight. I was building a name for myself as the Chain Master Lebuty. But now? I'm just a humble bandit. A grimoire can only by used by the person it chose as it's master. Heh heh! But there are plenty of collectors who would pay a king's ransom for the 4-leaf clover. "Although you were chosen by this grimoire, it just happened, so you're no threat. Too bad you had to run into me here. Your legend will end long before it starts." Lebuty says to holding Yuno's grimoire.

When Asta got closer to the cliff he jumped and saw that his foster brother, Yuno, and two others were restricted by iron chains conjured by a nasty looking mage, who Asta guessed must be Lebuty, whose scent told Asta he was bad news.

"Wait right there!" Asta shouts then uses his new enhanced abilities bounces off the wall and lands in front of Lebuty binding Yuno.

"What the hell's going on here?!" Asta asks loudly pointing at the mage and notices the man is holding Yuno's grimoire, the one similar to the grimoire that the first Magic Emperor received.

"Asta…" Yuno says and notices his foster's brother physical change in height and could feel magical power coming from him. 'That's…magical power. And its enormous.' He thought with a tiny smile on his face that no one could see.

"Hmm…? Oh, you're…the pathetic kid that wasn't chosen by a grimoire. Heh heh heh heh heh!" Lebuty snickers.

"I'm glad you know. That's right, I wasn't chosen by a grimoire. I was chosen but two grimoires!" Asta yells as his two grimoire levitate in front of him shocking both Yuno and Lebuty.

"What the…two grimoires? That's impossible, there's no one who could possess two grimoires at the same time." Lebuty says shaking slightly.

"While then I guess I'm just as special as Yuno is, he possesses the legendary 4-leaf clover grimoire while I possess two grimoires. One who's magic hasn't been seen since the era before the first Magic Emperor. Now then, a grimoire is a precious item that was handed down to a single person! Give that back to Yuno!" Asta yells.

"Heh heh heh…it doesn't matter if you have two grimoires or one. You just received magic power after 15 years so that makes you an even smaller threat than your friend here. Doing twisted things like this is quite normal once you step out into the real world, kid. Would you like to die before you see it for yourself?" Lebuty asks.

"…" Yuno then realizes what Lebuty is about to do. "Asta, run!" He yells to his foster brother.

"You think I'll run from a guy who's…" Asta begins to say and then charges at Lebuty with a burst of speed. "Fallen this low?!" He asks.

"Heh heh. I may have fallen, but it's from the seat of a Magic Knight. I won't even break a sweat on you." Lebuty says summoning more magic iron chains.

Asta manages to dodge the chains but then realizes that they are wrapping around his waist, but he continues pushing forward surprising Lebuty.

"This isn't stopping me!" Asta yells.

"Oh…?" Lebuty asks as the pages turn in his grimoire. "Yes it is. Creation Magic: Dance of the Pitless Viper!" He says creating several chains, which he manipulates and hurls them towards Asta.

The tips of the chains manifest into a snakes' heads, which then attack Asta from multiple directions at the same time and the force of the attack sends Asta into the cliff wall.

'Damnit, being a dragon slayer gave me harder skin but that still really hurt! Are all mage's in the city are this powerful? I might have really trained my body, but it didn't help at all.' Asta thought.

Lebuty then summons more chains from the cliff wall and restrains Asta even if he could still move his arms.

"Thanks for that wonderful display of futility. Heh heh heh!" Lebuty says placing his foot on Asta's shoulder. "Since you tried so hard, I'll tell you something good. I can tell exactly how much magic power a person has with these chains. And your magic power is almost that of a Magic Knight Squad Captain's! I don't know how you received magical power, but it doesn't do you any good if you can't use any spells." He informs the boy.

'He's right. I just got these grimoires, but I don't have any elements in my Dragon Slayer Magic grimoire. And I'm not sure what go my Anti-Magic grimoire can do, I'm not even sure how to use it.' Asta thought starting to get depressed.

"During the ceremony today, you weren't picked by a single grimoire and I never knew someone like you actually existed. Thinking of you then and now, I can only think of you as pitiful. And your talent laden friend over there…heh heh…he must have been making fun of you the whole time." Lebuty says.

'You might be right…Yuno was born with magic and trained for years to use it while I've only had less than an hour with mine. Plus, he was chosen by the 4-leaf clover. I always knew that was amazing. I must've been an eyesore to him.' Asta thought.

"It'll take years before you can do a damn thing in this world. Just give up on everything. Because you are a born loser!" Lebuty shouts.

'He has a point…Yuno has years ahead of me on magic usage…maybe I should just…give…' Asta thought.

"Hey who the hell are you calling a loser?" Yuno says catching Asta and Lebuty's attention. "He's…" He begins to say.

[Flashback]

"That's mine." A young Yuno says to a man who had taken his necklace on the verge of tears.

"I'm just going to make some money out of this. Ha ha! An orphan from the slums like you shouldn't be carrying around things that are above your status." The man says teasing the young boy. "Magic is what makes the world go round…" The man says showing off his magic. "Do you want to have a magic battle with me and die?" The man asks.

Yuno was about to cry when suddenly a young Asta rushes past him and jumps at the man attempting to grab at the necklace.

"Whoa! What's with this kid?" The man asks in shock holding the necklace out of range of Asta.

"That belongs to Yuno! Give it back!" Asta yells.

"…" The man glares at Asta. "Don't you dare touch me with your filthy hands, slum rat!" The man yells swatting Asta away.

"Asta…" Yuno says watching his foster brother.

"You little…" The man begins to say.

"I'm not done yet!" Asta shouts only to get the same result. "You're not getting rid of me like that!" He shouts getting the same result again. "Not" He says getting back up again.

"…" The man stares at a beaten up Asta who had once again gotten up.

"I'm still standing…" Asta says.

"…Fine! You can have the damn thing back." The man says throwing the necklace on the ground and walks away.

"Thanks Asta." Yuno says crying checking on his foster brother laying on the ground. "Are you alright?" He asks.

""Magic makes the world go round"?" Asta asks repeating the man's words. "Alright, then I'll just go and prove it." He says surprising Yuno as he sits up. "We may be poor; orphans; and have very little magic power…but we can still stand on top of the world. I'm going to be the Magic Emperor." He says with a large smile on his swollen face.

"Me too. I'll become the Magic Emperor too!" Yuno declares with the same resolve as his friend.

"Really? Ok then, we'll…" Asta begins to say.

[Various Flashbacks of Asta and Yuno doing different kinds of training; Asta, physical. Yuno, magical.]

'He's the one that gave me the courage to take that first scary step. No matter how far ahead I moved, he would always be right there.' Yuno thought remembering his past with Asta.

[End Flashback]

'Its because he never gave up that I…' Yuno thought. "He's no damn loser! Asta is my rival!" He declares causing Asta to snap out of his depression.

"Hmph." Lebuty scoffs but then feels Asta grab his leg.

"I'm not done!" Asta yells and tries to attack Lebuty.

"Ugh!" Lebuty grunts as he manages to remove his leg from Asta's grip.

"Sorry for the unsightly display there Yuno. Give me a second, I'm going to beat this guy!" Asta yells as his Anti-Magic grimoire summons a large dirt covered broadsword. 'I get it now. This sword is how I use Anti-Magic. Okay, let's get started.' He says canceling out his magic as he grabs the sword.

'What's going on here? His magical power just vanished. It's like he was at the ceremony today, magicless. Is this the magic of that black grimoire?' Lebuty asks and then notices the two grimoires' clovers.

'The leaves of the clover represent faith, hope, and love. And in the 4th leaf, you have fortune. And in the 5th leaf. What…you get is…"unnatural".'

Lebuty sees the silhouettes of two creatures to the left and right of Asta. On the left it looked like a dragon and on the right some kind of horned demon.

"…Wha…What on god's green earth are those?! How the hell is a chump with no magic right now doing this?!" Lebuty asks sending a single arrow tipped chain towards the restrained Asta intending to pierce him.

'He has the ability to cancel his magic and…

"This is heavy." Asta says raising the broadsword. "Who would've guessed…" He begins to say.

'It's because of it was Asta that he can possess this.'

"That all my physical training would pay off here?" Asta says slicing the chains restraining him.

'The Anti-Magic grimoire.'

"He just erased my magic?!" Lebuty asks in pure shock.

Asta then quickly reactivates his magic and grabs the single chain with his left hand as the broadsword returns to the Anti-Magic grimoire.

'Now then…' Asta though as he opens his mouth and takes a bite out of the chain eating away at the iron shocking both Yuno and Lebuty. 'So this is how I gain elements for my Dragon Slayer grimoire.' He thought

'By eating magic with the right elemental property…'

"Iron Dragon Slayer Mode!" Asta roars as his magic power explodes around him.

'Asta is able to create a new type of Dragon Slayer Magic.'

"Here goes! Iron Dragon's Scales!" Asta yells as Yuno, Lebuty, and the other two watch in surprise as a light shines under Asta and his skin is turned into what appear to be metal scales. "Get ready, cause here I come you creep." He says as he gets into a fighting stance. "With these two grimoires, I'll become the Magic Emperor!" He yells and dashes towards Lebuty at high speed. "Iron Dragon's Hard Fist!" He screams as he delivers his fist into the off guard Lebuty's stomach.

Lebuty spits up bile as he released his clutch on Yuno's grimoire and is sent flying into the cliff wall where one of the others are trapped. The dust cleared to reveal Lebuty embedded into the wall and unconscious. The chains holding Yuno and the two vanished as Asta's skin returned to normal and his Dragon Slayer grimoire flipped a page and began filling in the title, description, and spells of Asta's Iron Dragon Slayer magic in a language only he could read. Asta then picks his grimoires and grins at them, not noticing the 5-leaf clovers on the covers.

"So this is the power of Dragon Slayer Magic and Anti-Magic? These are amazing!" Asta shouts.

"Asta," Yuno says grabbing his grimoire and walks over to his rival. "You saved me again. One day I'll pay you back for your help." He says. Do you remember our pledge? I need to hear from you that you haven't forgotten." He says.

[Flashback]

Both young Asta and Yuno fist bump each other with smiles on their faces.

[End Flashback]

"Let's see which of us first becomes the Magic Emperor!" Both Asta and Yuno shout.

Author's note: Hope you all enjoyed the first chapter of this story. Please be sure to review and tell me what you think of it.