There are two types of super class. One whose vessel are super class at birth like Rizevim, Sirzechs and Ajuka. The second one is those who make their vessels bigger by training, to the level of super class like future Issei, Vali and Gasper.
I coincidentally falls under the first catagory, but my vessel is not fully utilized state. The only advantage I have that is my holy and demonic power grows faster thanks to my unlimited potential and super class vessel.
In three years I have reached peak High class at holy and demonic power reserves.
There is also help from Rizevim's blood purification serum, but the process is simply torture.
At the age of two, my first Blood purification serum left me totally paralized for a week. Besides the feeling of every cell inside my body breaking apart and healing then again breaking..... The process continues until the effects of the serum wears down.
If possible I don't want to go through that again but, who is listening to my agreement?
Till now I have gone through 3 blood purification serums. I hope it didn't turn me into a masochist.
Beside me, there was a silver haired girl, probably at the age of three, who also gone through three blood purification serum tests.
I still remember, her crying and shaking never stopped in the process.
I can understand her feelings, I may be younger than her that time but my soul of 35 year old self refuse to cry at that time, so I just gritted my teeth and held on, but she was a three year old child body and soul.
But because Rizevim still hasn't given me the Lucifer clan's magic crest, so I can't utilize my demonic magic of Lucifer clan. As for holy power, I don't know how to get Angelic magic crest.
Sure, Michel can give it to me, but I doubt he would after how much carnage Original Lucifer has caused.
It seems I have to wait untill my fifth birthday, to get the system and Lucifer's memory inhertence to get demonic and holy crests.
Now I can only utilize some basic magic, like clean, Heal, communication, Barrier, and teleport thanks to my teachers in old satan faction.
Besides I can already manifest my [Sword Creation] Sacred gear and Rizevim seems very happy.
I practice inside of the barrier at night and I can already progrees my sacred gear to Holy-Demonic Sword Creation Balance Breaker.
I have also somehow understood my sacred gear, besides host's will it also seems needed a level of magical power to perform my 'DRIVE' and that is probably ultimate class.
Yes, Issei able to use 'Juggernaut Drive' at mid class devil level but it also sucked out his life force in compensation of magical power.
A reincarnated devil's lifespan is almost 10,000 years and after Issei used his 'Jaggurnaut Drive' he was left with only 100 years of life span in cannon.
Here I have no desire to perform my 'DRIVE' in compensation of my life span, not a chance!
So I focus myself on my level breaking and step into Ultimate class as soon as possible.
This time Vali also got his bloodline purification serum at the age of 2½ years, and he started crying and knocked unconscious after half an hour.
Since he is not as powerful as me, he gained a half year leeway, but it seems still too early for him.
Aria also disagreed to Vali go through that hell like my time but she got severely beaten by Razevan like last time, while mumbling, 'without strength, he is dead in Lucifer clan'.
While in this mess, I made a little Friendship with Euclid Lucifuge, Rizevim's aide.
From him I got to know that it was impossible for devils over age of 18 to purify blood through blood purification serum.
Razevan probably frustrated because of this, being at the age of over 600+ still a mid class Devil, he can't use it to wash of the shame of weakest Lucifer descendant. Sucks to be him.
Poor Razevan..... It seems his death is inevitable. Not that I care because he still beat Aria up.
Dude you better realise Aria and erase her memories of this hell so that she can start a new elsewhere, just like original cannon or I will probably kill you before Rizevim does.
When I reached 3½ years age and Vali 3 years age, Rizevim started training both of us harshly but soon found out that I can learn everything very quickly (thanks to my unlimited potential) so he went little easy on me.
But on the other hand training for Vali became more intense. Rizevim thought I am a born talent (which I actually am, thanks to my wish) and left me be just teaching me about how devils should be according to his ideals.
During this time Vali began detesting Rizevim more and more. I was getting strong quickly and already have six devil wings ( well peak of the high class).
Razevan started to abusing Vali to get stronger and match me due to that Vali's hate for his family grew even more.
Vali only cared and loved his mother and me, who always encourage him that he will become stronger.
But due to childish rivalry, he couldn't show this because I was always better than him no matter how much he train.
Vali still had not woken up his Sacred gear where I, though only a mid class Sacred gear, have awakened it. (Even unlocked Holy demonic sword Creation Balance Breaker, and in verge of upgrading it to a high tier Sacred gear). Our days passes by this and soon my 4th birthday was nearing.
During this time Rizevim sensed my Sacred gear was in verge of upgrading to high class and Vali was in verge of unlocking his Sacred gear so to give us the final push, he made a sinister plan to kill Aria in front of us brothers.
Rizevim thought this simulation was enough for me to push my Sacred gear a high class Sacred gear, and Vali to unleash his Divine Dividing sacred gear.
At the day of my birthday Rizevim said " C'mon Alfred it's your birthday and I have a gift prepared for you and Vali as well".
Vali said with puzzled expression " But it's big brother Alfred's birthday, why am I also getting gifts?"
Rizevim chuckled and said " Now now little Vali do you hate gifts?"
I said enthusiastically "what gift is it brother Rizz, Is it a sword?"
Vali curtly answered " I don't need your gifts!"
Rizevim smiled and went in front of our mother figure/mother and stabbed her heart with a knife repeatedly.
Both of mine and Vali's faces were full of horror. Rizevim then cut off Aria's head and both Vali along side me was crying.
Vali then stood up with intense anger and said "I will kill you!!"
Then two white-silver wings materialized behind his back unknowingly and attacked Rizevim.
He had activated his Sacred gear Divine Dividing.
Me on the other hand was cluching my chest hardly. I was feeling that my heart was going to rip apart.
After a few moments the pain vanished alongside most of my holy and demonic energy. I looked and see that a beaten up Vali was lying on the ground and Rizevim laughing, since his plan worked.
At that time I know that I can't beat him but emotions got better of me and I attacked him with new High class Sacred gear as he wishes.
I shouted "BALANCE BREAKER"
Unlike holy demonic sword which was a western sword, an ordinary Katana with violet-colored handle appeared in my hand maintaining the patterns of holy demonic Sword.
I was thinking this to make my 'DRIVE' but it seems not needed due to evolution of my sacred gear.
"Scatter. Senbonzakura"
The sword glowed pink before it started to scatter from tip into many Sakura petals.
"Are those supposed to do anything?" Rizevim was mocking me but I could see that his eyes were watching Sakura petals surrounding us carefully.
I wave both my hands and the petals seperated into several tendeils and attacked Rizevim.
Rizevim put on a barrier while watching the petals trying to shred him into pieces.
Before my demonic power and holy power was about to run out Rizevim caught one of the sakura petals and cancelled my sacred gear and petals vanished into thin air with his 'Sacred gear chancellor' ability.
I dropped onto my knees and then passed out due to mental exhaustion.