Reborn In Black Clover With Demon Slaying Magic

Not wasting any time, Asta dug his feet in the ground and immediately sprang into action by entering his black form.

*BOOM!!*

Kicking off the ground with a tremendous force, he charged towards Grim.

'Going all out from the start huh.'

Not wanting to give him time to react, Asta flashed in front of him with his demon slayer sword raised high in the air.

"HAH!"

Tightening his grip on the hilt he mercilessly slashed his sword down.

*SWOOSH*

*BANG!!*

"WHAT!!"

Slashing down with all of his strength, a look of shock and awe crossed his face when he saw Grim materialize his beast swords to block the attack.

"Heh."

*CRACK!!*

Due to the bone shattering force generated from their swords colliding, the two magic knights unleashed a devastating shockwave so powerful that it threatened to rip the flesh off the combatants that were to close to its epicentre.

"Oh my god!" Everyone gasped as they watched the ground beneath Asta and Grim's feet collapse due to it not being able to withstand the pressure.

'What force!!'

"Heh." Raising his head, Grim grinned at his squad mate. "That's not all you have, right Asta?"

Smiling back, Asta said.

"Not by a long shot!"

*BOOM!!*

Pushing back against each other, Grim switched to [Breath of Wind] and used [Rising Dust Storm] to manifest a sharp rotating wind underneath Asta's feet. .

*FWOOSH!!*

Sensing his intent with his ki, Asta put some distance between the two of them by jumping back and avoiding the sharp whirlwind that rose from the ground.

Grabbing the hilt of his Demon Slayer sword with both hands, he stomped down hard and shot towards Grim in a half running half flying state.

*SWOOSH!!*

Coating his body in anti-magic, Asta flashed in front of him with the Demon Slayer held at his side and dealt a powerful horizontal slash aimed at Grim's head.

[A/n: Damn boy, calm down.]

Feeling the pressure from the blade pass over him, Grim lowered his centre of gravity to duck below Asta's sword and slash at his knee before spinning and following through with a [Breath of the Beast] enhanced kick to the abdomen.

*BOOM!!*

"Arghh!!"

Sending him flying backwards, Grim completely forgot about the whole point of the tournament and he shot forward and caught up to Asta while brimming with energy.

"LETS DO THIS ASTA!!"

Feeling the wind blowing past his face, Grim couldn't hide his excited grin as he charged forth.

*FWOOSH!!*

"OH CRAP!" Was the last thing Asta managed to say before Grim closed in on him and was about to uppercut him.

*BOOM!!*

"AAAAHHH!!"

"THAT'S MORE LIKE IT!!" Grim roared.

Somehow able to block his punch with the flat side of his sword, Asta was sent hurtling upwards and through the clouds.

"ASTA!!" Mimosa yelled while defending the crystal from Grim's teammates.

'What the hell! He wasn't this strong the last time we fought!'

---

-Viewing Area-

Sitting on the chair with Charmy in his ŀȧp, the wizard king watched the fight with great interest.

"Hey, isn't that-

"Mmm, its reinforcement magic." Julius cut in.

---

Barring the fight in the Witches Forest when he was unconscious, the last time Asta and Grim had truly fought properly was when Luck was involved all those months ago. So it was natural that he didn't know Grim had learnt reinforcement magic, after all, he had only learnt it after his fight with Mereoleona. And since his stamina had recovered from his fight with Langris and Fragil, he could finally use this power to its fullest extent.

Gritting his teeth and doing his best to ignore the numb feeling spreading through his arms, Asta managed to use his black wing to stop himself from getting blown through the stratosphere and stabilize himself. It was just too bad that Grim hadn't been satisfied yet.

[Breath of Water - 8th Form: Waterfall Basin]

"What the hell!" Were the only thing he was capable of saying once he saw the descending quantity of water falling from the sky. And to make matters even worse, Grim was charging up from the ground with a crazed expression on his face.

Above him was a ridiculous amount of descending magic water and below him was a crazed maniac ascending towards him.

[Black Hurricane]

*BOOM*

'If I continue to spin this fast then Grim won't have a chance to attack me!'

[A/n: Oh you sweet child.]

*FWOOSH!!*

"WHAT THE!!"

Using ki and the transparent world to analyse and predict the speed and angle of [Black Hurricane], Grim managed to find a small gap in the anti spell and with some quick adjustments to his own speed and velocity, he exploited the opening in Asta's defence to burst through the outward layer of the hurricane without being slashed by the Demon Slayer sword and shot right past a spinning Asta.

'Did he just come inside my hurrican-

"WAAAAHHHH!!"

From an outside perspective it may have looked like Grim had just entered into Asta's anti-magic spell and flown through the other side, but the reality of the situation was that while Grim had flown past him, he had actually grabbed onto Asta's wing and dragged him along.

*BOOM!!*

*BOOM!!*

"WAARRRGGGHHHHHHH!!"

Using his natural ability to fly, Grim switched to [Breath of Blue Flames] and repeatedly used [Grim style - Unknowing Fire] three times to accelerate higher and higher at such a speed that the wind threatened to cut his face.

'This should be enough.'

After reaching a height that was out of sight of the wizard king and the others, Grim tightened his grip on Asta's wing and began to swing him around.

*Swoosh!* *Swoosh!* *Swoosh!* *Swoosh!* *Swoosh!* *Swoosh!* *Swoosh!* *Swoosh!* *Swoosh!* *Swoosh!* *Swoosh!* *Swoosh!* *Swoosh!* *Swoosh!* *Swoosh!* *Swoosh!* *Swoosh!* *Swoosh!*

"AAARRRRGGGHHHHHH!!!" Feeling like he was gonna throw up, Asta stuck through the pain of having his wing nearly torn off.

*BOOM!!*

Letting go of him, Asta's body flew through the air at a speed capable of creating a sonic boom.

After training to increase the speed in which he changed magic types, Grim rapidly switched styles as he kept firing off long ranged magic attacks.

[Eight-Layered Mist]

[Rengoku]

[Claws Purifying Wind]

[Sudden Throwing Strike]

*SWOOSH!!*

*SWOOSH!!*

*SWOOSH!!*

Managing to stabalize himself, Asta went on the defensive as he started flying in order to evade. While he was confident in deflecting Grim's attacks with his swords, something told him that doing so would be in Grim's favour.

Watching Asta fly through the air and evade his attacks, the smile in Grim's grew wider as his Grimoire suddenly glowed bright blue.

[Constant Flux]

Feeling his mana rise and fluctuate once more, the blue aura around his body seemed to separate from himself as it formed itself into a giant blue water dragon.

"Hunt."

*ROOOAAARRRRRR!!!*

Heeding his command, the water dragon's eyes flashed as it unleashed a ferocious roar before springing towards Asta.

"Are you kidding me!!"

Dodging all of his long ranged attacks, Asta was surprised to see a giant fuċkɨnġ water dragon trying to eat him.

*SNAP!!*

Barely managing to dodge the dragon's jaws, Asta swung his sword and slashed through its watery neck.

"Huh?!" But to his shock, the fact that the dragon was still there sent a shive through his whole body.

"That won't work."

Hearing Grim's voice behind, Asta suddenly realized that Grim's ki was no longer in the distance.

Like running a knife through water, everything finally clicked in Asta's head.

It wasn't that his anti-magic didn't work on Grim's dragon, it was the fact that Grim's dragon had no solid form and his sword was merely passing through it so it couldn't really cut it.

Unfortunately he had figured it out to late, if he had used [Black Hurricane] straight away he would have destroyed Grim's dragon and might have been prepared for Grim's ambush.

Before he could move any further, the feeling of Grim's sword pressing against the back of his neck stopped him.

"I...I lost." Asta sighed not seeing anyway to get out of this. Even if he was able to get away and use [Black Hurricane] to take care of the dragon, there was no guarantee that Grim wouldn't be able to find another gap in his defence and slip through again.

"But my job is done." Asta suddenly smiled.

"Job?"

*DING!!* *DING!!* *DING!!*

'The bell... He was stalling for time!'

"Heh, Xerx said that I should keep you busy while he and Mimosa took care of your crystal."

"Is that so..."

Seeing that Grim wasn't panicking, a feeling of discomfort started rising in Asta's ċhėst.

"Why are you so calm, I just told you that everything had gone according to my team's plan!"

"Ha, if I had normal teammates then I would be worried... But I have a wild card."

"A wild card?" Asta repeated.

---

Down on the ground, a bruised up David stood in front of Selena with a dice in his hand and a smile spread across his face.

---

Dice magic, the power to increase or decrease the magic power of an ally or enemy. A risky magic that could drastically change the outcome of any battle.

Since Selena's primary objective was to keep the crystal safe at all costs, she was constantly on the move while David kept casting debuff spells on his enemies. Once he had gotten the results he wanted, he'd have Selena attack. With this hit an run tactic in play, the two magic knights managed to finally destroyed the enemy crystal while avoiding damaging their own.. That being said, there were a couple close calls.