A/N: Yo I'm back with another chapter, by the way I chose X-23 to be Asta's 4th girl in harem. That being said hope you enjoy this chapter

5 years later

It has been 5 years since Asta had gotten his new abilities and Asta had been awakening new abilities over the past couple of years. To say his foster family was surprised would be an understatement. They even speculated if Asta was the reincarnation of some sort of ancient hero. Asta had unlocked abilities like forcefield creation, Invisibility, portal creation, telepathy and energy projection.

Asta's new abilities had made life a lot easier around the church as they were able to collect food easier and the chores were done in seconds. With most of the errands done it left Asta enough time to train his powers and fix up the spaceship that he found under the demon skull. Though things really changed for him and Yuno when he discovered his new ability at the age of 13. The ability to transmute matter into anything he wanted.

Flashback

Asta at age 13

"Hey Yuno, come with me to the forest I wanna show you something" Asta excitedly told his forest brother. Yuno stopped his training and looked at Asta.

"What is it?" Yuno asked with a raised eyebrow.

"That's a secret until you actually come for yourself." Asta said with a large proud smile on his face making the wind mage even more confused at what Asta wanted to show him.

'Maybe he unlocked a new ability' Yuno thought to himself as he resigned his thoughts and followed Asta to the inside of the demon skull. They finally arrived at their location and Yuno so far nothing out of the ordinary other than the ground looked more flat and slightly cleaner.

"Ok, Yuno you ready?" Asta asked the raven haired boy

"Ready for what?" Yuno asked confused

Asta didn't reply to Yuno's question but instead looked at the ground ahead and said "Open Sesame". The moment Asta spoke those words the ground shook and 2 large metal doors slid open, splitting the ground below to reveal a clean metallic platform. Yuno was speechless at what he was seeing and looked at Asta about to say something but Asta raised his hand making him stop.

"Oh just wait Yuno, you haven't seen anything yet" Asta said walking up to the platform. Yuno joined him and stood beside his brother. The platform slowly descended down as Yuno was doing everything in his power not to blabber out questions like an idiot. The platform was descending deeper as Yuno saw that he and Asta were surrounded by white Metallic walls that had glowing white lights and the side.

'Just what is this place' Yuno thoughts to himself

They finally reached the ground floor and walked to the large metallic door at the front. Asta put his hand on the control panel next to it and the door opened. What Yuno saw made his jaw drop.

Inside was the cleaner version of the cockpit of the spaceship with working screens that had images and information on human anatomy and the sorts.

"Welcome Yuno to my playground" Asta said with a grin on his voice. Yuno looked at Asta and finally spoke to him

"Where are we? What is this?" Yuno asked, still amazed at what he was seeing.

"To answer your question, we are underground inside a spaceship from many years ago." Asta explained

"...spaceship?" Yuno asked confused

"Yeah it is essentially a vehicle used to travel between the stars in the night sky" Asta said, giving an oversimplified definition.

"...ok…when did you find this and what are we gonna do here?" Yuno asked again, amazed at what Asta just told him. He could believe there was actually something that was used to travel between the stars of the world.

"I found this 3 years ago. I was a lot different than what it currently was, I just did some re-organizing to the place. And to answer your other question…I wanna help you get stronger" Asta answered honestly

"How?" Yuno asked both intrigued and somewhat excited at the fact that he could get stronger.

"A few days ago I discovered I had another ability where I can essentially make other abilities stronger, not only can I make your wind magic stronger. With my scientific knowledge I could make it where your body stores and releases an insane amount of magic. Within 2-4 hours I can make you 50 times stronger than you already are"

When Yuno heard that last part his eyes practically bugged out of their sockets. Yuno was strong (well way stronger than your average 13 year old mage), but to think he could get 50 times stronger right now sounded way too good to be true. If he could get 50 times stronger right now imagine what he would be when he gets older with training.

"Ok Asta, let's do this," Yuno said in a somewhat eager tone.

Asta grinned at this and then put his hand on Yuno's head. Yuno was confused by this at first but soon knew what Asta was doing when he felt a massive spike of mana in himself. His body was giving a green glow for a couple of minutes and his body was also sweating heavily but still stood firm. A minute later Asta took his hand off Yuno's head and the raven haired boy plopped down to sit on the floor breathing heavily.

"*pant* *pant* whoa *pant*" Yuno said simply as he was catching his breath. He could feel the potent mana coupling through his body, he knew he got stronger but wasn't sure how much.

"Take your time and catch your breath Yuno, then meet him in the room up ahead." Asta said walking to a corridor in order to prepare for the next step of Yuno's development. Yuno sat on the floor catching his breath for the next 5 minutes and stood up to follow where Asta went.

Yuno walked up the corridor into a room that was a laboratory. The room had several computer screens, several cylinder's glass tanks and a counter with various chemicals.

"Yo Yuno, you're just in time," Asta said excitedly. He was currently filling an opened tank with some green liquid and went to a computer to type in something.

"Ok Yuno, strip to your underwear and I'll put these wires on you" Yuno gave an uncharacteristic blush but did so and Asta put some wires on his body. Asta then gave Yuno an oxygen mask and put Yuno in the tank filled with the green liquid. Asta then injected several different chemicals in the tank with the wires sending low grades of electrical shock. Yuno soon fell asleep and this process of low electrical therapy and chemicals continued for the next 3 hours and Yuno was released from the tank.

'Wow…his body is absorbing and storing a lot more mana than I predicted' Asta thought to myself as he looked at the screen of his computer.

"Hey Yuno you good!" Asta asked, shaking him awake as he was lying on the table Asta brought. Yuno groggily woke up and looked to see Asta with a smile on his face. He tried to say something but his mouth was dry and he was hungry as hell. It was only made more apparent with his stomach growling.

"Hehe don't worry this is the 2nd last part of your development" Asta said, bringing some food to Yuno. He needed nutrients in his body and also needed to get some rest as his would be fully ready to perform magic.

Yuno ate the food and the both of them went back home with Asta using his Teleportation to bring them back.

Next Day

*Whoosh* *Crack*

Yuno stuck his hand sending a gust of wind towards a tree. Unfortunately he underestimated how strong he had gotten and obliterated a rock 2 times the size of his home.

"Amazing…I wasn't even trying and I completely destroyed the boulder into pieces" Yuno said, amazed at his own power. Not only had his magic increased exponentially he his body was a lot stronger and tougher compared to the several other mages. He was nowhere close to Asta but compared to most mages he was superhumanly strong without the use of magic. The only problem now was to actually control this insane magic he was wielding.

Yuno spent several hours each day practising his control and was getting better each day. He could now fly at super sonic speeds and send out powerful wind attacks. Hell Yuno was so strong at this point you would think he had a grimoire.

"Hey Asta, let's spare" Yuno told the ash haired boy who was making some notes in the laboratory of his ship.

"Hmm…ok let's head to the training room though" Asta said as the 2 boys walked to a different corridor that took them to one of the training rooms. The room was a large open empty space that had its walls and ground reinforced with dense concrete and an alloy ten times more durable than titanium.

The both of them arrived at the centre of the room and they both started stretching, although in Asta's case it was mostly just for show as he was pretty confident he could beat Yuno.

"I won't hold anything back" Yuno stated with conviction in his voice stopping his stretching

"Yeah…I know" Asta replied with a smirk on his face as he also finished his stretching. The 2 of them stared at each other for a couple of seconds waiting for the first move to happen. Yuno relented and attacked first. He sent 2 massive spirals of wind towards Asta with incredible speeds. Asta didn't look fazed by this and turned his arm into a large shield perfectly blocking the tornadoes.

Yuno used this opportunity to get behind Asta and held a compressed ball of air in hand aimed at Asta's head. Asta ducked then gave a leg sweep to Yuno, almost catching him off guard but he got his bearings together and used his wind magic to fly back.

"Hehe guess it my turn" Asta said as his eyes lit up purple energy, then blasts of optic energy were sent directly towards Yuno. Yuno swiftly dodged the beams of energy not getting a single hit on him. Asta predicted where he was going to dodge next, he then stretched out his arm to grab his leg and slammed his body onto the ground causing some pain and disorientation to the raven haired boy. Asta kept slamming him 2 more times but was surprised by what Yuno did next.

He focused the wind on his hand creating a wind blade and used it to sever Asta's arm to free him from the boy.

"I honestly never thought you would sever any of my limbs off in our sparring matches" Asta said as his arm grew back

"You can regenerate"

"...Still" Asta said with a shrug

Yuno started moving around the training ground to try and confuse Asta while sending several gusts of wind towards his foster brother. Asta dodged these attacks by either moving to the side or jumping up. This continued for about 5 minutes until Yuno changed his tactics.

He could feel the mana in the air and unintentionally created a mana zone. A technique that even some of the most experienced magic knights couldn't do. Several wind blades were now sent towards Asta from all directions. Asta couldn't help but be impressed again with Yuno. That being said none of the attacks hit the ash haired boy as he made a purple barrier around himself.

Asta then shot out energy beams with his force field making the raven haired boy move and dodge around the attacks. Yuno was moving so fast it looked like he was teleporting

'Hmm I need to get past that barrier, but let's confuse Asta' Yuno thought to himself as he increased his speed and used the wind magic to leave after images of himself. As he was doing this he was using creation magic to form a blade made of wind that moves at high speeds used to cut almost anything. Yuno got behind Asta's barrier and attacked the barrier by stabbing it, which actually shattered the barrier. Asta didn't look surprised by this but instead smiled

'Without a doubt Yuno will be the strongest mage, hell maybe even the strongest mage in history' Asta thought to himself as both of the boys continued sparring for 5 hours straight not taking any break until it was getting dark. They probably would have gone at it alot longer if it weren't for the fact that they had to be home before dark.

Asta didn't only spar with Yuno but he also improved the livelihood of his church. Such as he created an advanced heater for the winter, a washing machine, a freezer, etc. The best part was they ran on solar energy that could last for months on a full battery. He even gifted his foster brother and sister Nash and Recca a hoverboard and drone on their birthdays.

Present day

Asta was in his lab figuring out where to travel first and find the location he could create his country in. The years had been pretty good to Asta as he stood at 6 feet 2 inches tall in height, had longer still spiky hair tied in a small ponytail with 2 bangs each at the side of his head and a ripped muscular physique.

'I should probably do some travelling a bit to find the perfect place to create my country. Though I should be cautious how I take the ship out of the ground' Asta thought to himself sitting on his chair.

"Asta…Come on, it's time for the grimoire ceremony," Yuno said walking into the Asta's laboratory. Yuno had also grown significantly taller at 5 feet 11 inches and he also had an athletic tone body, though the rest of his appearance was maintained just like in canon.

"I don't had magic Yuno, so I highly doubt I would get a grimoire" Asta said with a shrug

"Perhaps but you could still make an appearance just to see what kind of grimoire I'll get"

"I am 99.99999 percent certain you will get 4 leaf grimoire" Asta said with a proud grin with Yuno shrugging

"Still I think you should still make an appearance"

"Alright alright I go" Asta said as he stood up and walked with Yuno to get to the church where everyone was waiting. As they were walking to the church the civilians of Hage village noticed them and began whispering calling them the pride of Hage with some girls having hearts in their eyes with how handsome they were.

They finally made it to the church to see Father Orsi, Sister Lily and the kids of the church.

"Hey guys" Asta said with a cheerful tone as he picked up his 2 Aruru and Hollo making them float in the air with his telekinesis.

"It about time you arrived Asta, Father was already crying you had left the church" Nash said nonchalantly

"Waah? No, I was not doing that!" Orsi said in complete denial causing Sister and the rest of kids to laugh.

"Come now, let's head to the Grimoire tower" Sister Lily said finishing her giggle. They all nodded and walked to the tower where many of the commoners were heading to. When they arrived inside they saw many commoners either waiting patiently or just talking amongst themselves. They even noticed a few nobles.

"Ugh look at the these peons, they truly think that with a grimoire they'll achieve something with their pathetic lives" A noble wearing blue royal gowns mocked

"You don't have to tell me that, they'll be lucky enough to even work in the capital" The noble beside him said with a scoff

Many of the commoners heard this and were offended but couldn't do anything about it considering they were nobles. Asta and Yuno also heard this but they ignored them. Asta stayed at the side lines as he wasn't expecting to receive a grimoire and just observed his surroundings.

"WELCOME LADIES AND GENTLEMAN, we have gathered here to perform the grimoire ceremony. I pray that you will all have hope, faith and love as you all go out into the world to achieve your goals. Now let us commence!" The wizard of the grimoire tower announced as several grimoires floated out of their shelves and went to their owners.

"This is my Grimoire"

"Mine's really small…"

"Mine's really thin"

Several people commented on their grimoires as they received them, but then a bright golden light filled out the room and made everyone stop what they were doing. The turned to be a green 4 leaf grimoire that was radiating golden mana.

"No way…a four leaf grimoire"

"Come to me"

"No come to me"

Many people said stretching their hands out the book floated towards the raven haired wind mage. Yuno took the book and the light stopped radiating.

Yuno then turned around and spoke

"I…will be the strongest magic knight" Yuno said as if it were a fact, making almost everyone in the room cheering for him and Asta giving his brother a proud smirk.

'Can't wait to see what you do next Yuno' Asta thought to himself as he realised he didn't get a grimoire, though he didn't really care. He was making his way out until he noticed that a man covered in a hood was looking at Yuno in a very sinister way. Asta used his telepathy to see what the man was thinking even though he didn't like reading people's minds without permission, if a person possessed a threat to his family he didn't care.

'Hehehe what good luck, to think I would find the jackpot out in the boonies. I just need to steal his grimoire and get rid of the witness' The hooded man thought to himself in a sadistic grin. Asta was pissed someone would dare go after his family, he was about to crush the man's mind but stopped and thought to himself.

'I could easily kill him and no one would find any evidence. That being said, Yuno is gonna face many people like this. I need to know if he could be cautious.' Asta thought to himself. He knew Yuno was leagues stronger than this guy but wanted to see how Yuno handled the situation. Asta broke out of the people leaving and went to hide and follow the hooded man.

With Yuno

Yuno was currently walking to his own training ground to see what spells his grimoire had, that is until he heard an arrogant voice from behind him.

"Oi Peasant"

Yuno turned around to see the 2 nobles that were making fun of most of the commoners in the grimoire tower. Just by looking at them Yuno could already feel the massive headache coming his way.

"A filthy peasant doesn't deserve to have such grimoire. We were supposed to be the stars of the show. So hand that book over or else" The noble in blue sneered out.

Yuno looked at them with a blank expression for a couple of seconds until his lips finally moved.

"...no" Yuno simply responded

"You dare-" The noble's were about to attack but never got their chance as Yuno blew air from his lips which sent a heavy gust of wind towards the 2 nobles sending them flying back and making them fall on their asses. Yuno then realised his mana showing them that he was leagues above the in strength that it wasn't even funny. The moment the nobles felt this pressure they were doing everything in their power not just just soil their pants.

"H-h-how a-are y-y-you so s-s-strong" The noble stuttered out in complete fear. Though both of them didn't have time to get their bearings together as chains came out of nowhere, tied them up and swung both nobles against the wall knocking them unconscious. Chains popped out of nowhere and then tried to capture Yuno, but he dodged them by jumping up in the air and levitating high off the ground.

Yuno looked down to see a man with long hair coming out of his hiding spot.

"Tch…I guess a sneak attack won't work" The hooded man said in an annoyed tone though on closer inspection he was a bit nervous because he felt the pressure of mana earlier.

"Who are you and what do you want with me?" Yuno asked the chain mage

"I am Revchi and I want that 4 leaf grimoire in your hands. It's a rare item, it would sell a pretty penny in the black market" The man now named Revchi said, fully revealing himself.

"*sign* look, just walk away and I promise I won't hurt you" Yuno said, sounding tired of this whole situation. First the arrogant nobles and now some petty bandit.

"Tsk…don't mock me you arrogant brat!" Revchi snarled, sending several chains to capture Yuno.

*BAM*

Revchi didn't have time to process what had just happened as he was knocked out from having his body smashed against his wall. Instead of levitating now, Yuno had quickly moved in the blink of an eye right behind Revchi, grabbed his shirt and threw him against the wall effectively knocking him out. It happened so fast it looked like Yuno had teleported and Revchi had just mysteriously been thrown back.

Yuno looked at his surroundings for a couple of seconds until he looked forward.

"You can come out now"

Upon saying those words Asta revealed himself by turning off his invisibility from the shadows.

"How long did you know I was here?"

"Hmm right before those nobles tried to attack me" Yuno said with a shrug, making Asta grin. The ash haired boy then walked beside his foster brother as they looked at the sunset and the demon skull together.

"So six months from now you'll take the magic knights entrance exams?" Asta said

"And you're gonna be travelling to build your country" Yuno replied. The 2 of them stayed in that comfortable smile for a couple of more seconds until Asta finally spoke

"Knock em dead Yuno!" Asta exclaimed as he brought his fist up for a fist bump

"Right back at yah" Yuno replied as they bumped each other's fist and smiled, but with the intention of achieving their goals.

A/N: And that's a wrap hope you all enjoyed this chapter and please be sure to comment