Next time it'd be war!

The training area was nothing special. Just a humongous dome of rocky terrain. Its boundaries are enchanted with magic to absorb physical and magical attacks and use the absorbed energy as fuel to function various mechanisms, such as lights and other miscellaneous things.

"It's....quite big...."

I whispered under my breath in shock. Well, considering that average High-Class Devils can blow up mountains it's no surprise.

I find it hard to imagine how strong a bona fide Ultimate-Class Devil can do not to mention Super Devils.

"Alright time to start."

I took a deep breath to relax myself and channeled Demonic Power into my right palm.

Demonic Power manipulation is a racial ability, therefore it felt extremely natural.

The color of my aura is black with hints of cyan at the end. It reminded me of a certain character from one of the "Big Three"

Ulquiorra Cifer!

"Oh, let's do that."

I decided to try something different, instead of gathering Demonic Power in my palm I gathered it in front of my index.

Once I gathered a sufficient amount of Demonic Power—

"Cero Oscuras!"

Wooosh—

BOOOOOOM!!!

My Cero blasted through five mountains, obliterating everything in its path and created an abysmal crater.

I swallowed heavily. Stunned by the destruction caused by just one ordinary Cero.

"So, this is the power of a Super Devil..."

"That attack of yours could one shot a High-Class Devil."

"Father!"

I looked behind me and saw father staring at the crater with a wry smile.

"Really? But, I have yet to perfect this move. The charging time is too long."

True, a typical Cero takes about fifteen to twenty seconds to charge. The more powerful the Cero the more time it takes.

"Oh, we can solve that. Just now you simply gathered raw Demonic Power and fired it. That's honestly... crude."

"Hmmm, I'm listening."

"Use a magic circle. Created a magic circle to gather and compress Demonic Power. That'd shorten the charging time and magnify the attack's potency. Here, I will demonstrate."

A magic circle appeared before father and Demonic Power gathered in it. Just as he said, the Demonic Power is much more compressed and it did gather faster.

"What did you call this move again?... Ah, Cero Oscuras!"

Woosh—

BOOOM!!!

His attack blew up two mountains.

"Sigh, that's the best I could do. This move of yours relies totally on the amount of Demonic Power one possesses. Very basic, but for you who have too much Demonic Power nothing can be better."

Father said with slumped shoulders, while casting an envious gaze towards me.

"Yeah, simple but effective."

I replied with a cheeky smile.

"Okay, you practice. I'm leaving and don't mind the damage. As long as the entire place is not destroyed I don't care."

Leaving those words he teleported away.

"Guess, I'd do that."

I shrugged and got back to training.

I trained till evening and perfected my Cero Oscuras, additionally, I re-created "Luz De La Luna" as well as "Lanza Del Relampago"

By the time I finished training, about 80% of the training ground was gone...

Well... Father did say, as long as it's not totally destroyed everything is fine.

......

(One week later)

"I, Estarossa Astaroth challenge you, Diodora Astaroth for a rating game. The winner will keep the position of heir."

I challenged Diodora nonchalantly with my hands behind my back.

"Ridiculous! father how dare he challenge me?"

Diodora, who came to visit his younger brother(me) shouted in utter shock and rage. Of course, he never expected the first thing his younger brother would do after waking up was to challenge him for the title of heir.

"Technically, yes. He can. Moreover, you also cannot refuse. Refusing to fight would be an act of cowardy and I'd be forced to strip your position as the heir."

Father did not even bother to open his closed eyes and crushed Diodora's hopes of escape.

'Nicely done, father.'

I gave him a metal thumbs up.

"But, he doesn't have a peerage. Heck! He has yet to get his Evil Pieces!!"

He rebuked still trying to avoid fighting. After all, he knew damn well I was born stronger.

"Peerage? I'd face you and your peerage alone. Defeat me and keep your title."

I said in a bored tone. Totally discarding his advantage in numbers.

"You..."

He face turned as red as tomato in anger.

"Damn it! then can I ask for a week to prepare? As I never expected to get challenged by my good little brother~ as soon as we met!!"

Seeing as he got no choice but to fight he asked for some preparation time. A wise but expected move.

Father sent me a glance and I nodded. One week, that much I can give him.

"That, I can grant you."

"Then farewell brother, the next time we meet it'd be war!!"

He swore venomously, and teleported away.

"Are you confident you could take them on?"

As soon as Diodora left, father turned to my side and questioned.

"Totally. it'd be an one sided beat down. Believe me."

I answered in an extremely calm way. Not at all worried about the battle.

"Sigh... then you may go."

Father said and rubbed his temples.

"Then, see you later father."

I obed and teleported away as well.

...

'Status.'

[Name-Estarossa Astaroth

Gender- Male

Age- 16

Race- Pure-blood Devil

--------

Demonic Powe- Super Devil-Class

Strength- High-Class Devil

Speed- High-Class Devil

Stamina- High-Class Devil

Durability- High-Class Devil

---------

Racial abilities-

-Demonic Power Manipulation

-Language

-Flight

---------

Personal abilities-

-Cero Oscuras

-Luz De La Luna

-Lanza Del Relampago

-Teleportation Magic

-Defensive Magic]

My status improved quite significantly in this one week. All my physical parameters went up the level of a High-Class Devil naturally.

It was to be expected, Demonic Power passively strengthens our bodies. The only reason why I was so physically weak in the first place was due to that nasty sleeping disease!

In addition, all I did this one month was train my Demonic Power. Never once, I trained physically. As my bottomless reserves of Demonic Power is my biggest cheat.

At the moment, I can clash against Diodora head on without any trouble.

Now, all that's left is to enjoy beating the living shit out of my good big brother~

[Don't forget to give your opinions and suggestions on how to proceed with this fic since I may run out of imagination and creativity but I wholeheartedly wish to complete this fic. I am open to constructive criticism.]