There were many advantages to being the younger brother of a genius Devil and the third son of Phenex house, no matter what I did, the people within the Phenex Clan wouldn't be suspicious, simply labelling me as a prodigy like my older brothers.
Around the age of two, I started speaking rather fluently, along with learning the language written within the underworld.
After that, a maid helped me find Phenex Clan's library, which allowed me to learn various things about this world. From what the librarian told me, our library was one of a kind, being one of the largest ones in the underworld.
Having money is really something. It allowed someone to place a price tag at anything. Even the notes of history recorded by Satans. That's why Phenex clan library could be considered one of the greatest within the Underworld, probably after Lord Beelzebub's personal library and Bael clan's library.
Thanks to the library, I learned almost everything about Devils, from their social hierarchy, the Evil Piece System, history, and most importantly, their weaknesses.
Within the underworld, Devils were classified into four categories:
Low-Class Devils, Middle-Class Devils, High-Class Devils, and Ultimate-Class Devils, the highest official class a Devil could achieve.
Following that was the Satan Class, an unofficial class that referred to those who held the positions of the Four Great Satans, possessing enough power to either rival or surpass the Original Four Great Satans.
The Satan Class was said to be above the Ultimate Class, and they held the power to rival Lower Class Gods.
The Leaders of the Three Factions, like the Four Great Seraphs and the Founders of Grigori, were all considered part of this class.
Even if someone had the power to match the Satan Class, their official ranking within the underworld could only rise to the Ultimate Class since it was not an official classification.
All Pure-Blooded Devils from the 72 Pillars and Extra Demon Clans were considered High-Class from the day they were born, but that had nothing to do with fighting powers.
And then there were Super Devils: Devils who were considered an anomaly among Devils with the power enough to rival Higher Ranking Gods, or at least that was what the rumours said. In general, it was well known that they far surpassed the Original Four Great Satans, as Super Devil was a class purely based on one's power.
But since no Super Devil had ever shown their true powers, even during the Devil Civil War, no one knew much.
For example, the records about the Civil War made no mention of the power levels of individuals or the details of their battles. Their only purpose was to glorify the New Four Great Satans in the eyes of younger generations.
But then again, that wasn't something wrong. Anti-Satan Faction won the war, so they could write the history however they wanted.
The only known Super devils were Rizevim Livan Lucifer, the son of the Original Lucifer; Ajuka Astaroth, the current Beelzebub; and Sirzechs Gremory, the current Lucifer.
The existence of Super Devils made me realise the power scaling was so half-assed, especially when someone compared people from different races and mythologies, which was enough for me to facepalm myself.
But there was one more thing that I noticed.
Except for Super Devils, Devils weren't all that special as a species because even Ultimate Class Devils couldn't match most Gods, and all they could do was pretend to be big shots within the underworld.
They weren't weak, per se, but they didn't seem that impressive, either.
My talent was immense, yes, the second-best in the history of the Devils, even surpassing our Ancestor, but it was nowhere near Sirzechs or Ajuka's level when based on pure talent.
Well, as long as my life was long enough, reaching their level of strength was only a matter of time.
A thing that caught most of my interest was Evil Pieces, Lord Ajuka's most glorious invention and the base of the current Devil Society.
To be able to change one's race, reincarnating them as a Devil, was an idea that fascinated me to no end. It's one thing read in novel and now personally try and experience itself.
Sadly, I'm still long way to go to get my own Evil Pieces.
The highest Rank one could gain within the Underworld was Ultimate Class, which was a considerable feat since only two Reincarnated Devils reached the official rank of Ultimate Class. The two were Tannin, the former Dragon King, and Rudiger Rosenkreutz, the 7th Ranked player in the Rating Games.
The fact that Reincarnated Devils could climb so high made it evident how much potential was wasted by Pure-Blooded Devils.
After all, they would sit around on their asses and play politics rather than do something meaningful to hone their abilities.
Most of them solely relied on their natural talent, along with their Clan's ability to get stronger. Talented Pure-Blooded Devils could reach Ultimate-Class simply by ageing, so what would happen if they had some brain cells to train?
Honestly, it was idiotic.
Also The Ultimate Class certificate, doesn't justify one's power. From what I heard from mother that most of the council members weren't possessed Ultimate class power but by certificate they are Ultimate class.
Heirarchy is very crucial in underworld. If someone disrespect his superior, it can cost them their entire fortune, their families or even their life. So nobody wants to provoke or cross these group of old scammers.
I also learned a few things about Angels, Fallen Angels, Vampires, Gods, Dragons, Holy Swords, Demonic Swords, and something I was very interested in—Sacred Gears.
But there was one thing that crossed my mind quite often.
'Since human emotions and desires power Sacred Gears, what will happen if a Longinus user falls to the brink of despair? Like Guts with a Longinus...'
I know that monster type Longinus sacred gears like Boosted gear or Divine Dividing will fall into uncontrollable Juggernaut drive or Regulus Nemea or Canis Lykon will fall into uncontrollable beast form untill it fully consumes holder's life force.
But what about other sacred gears?
'Should I try it out with someone, maybe killing their family or something? The only Longius owner I know is Issei, but risking losing the Boosted Gear without researching isn't worth it... It's good as study material, but that's honestly it, like all Sacred Gears...'
To me, Sacred Gears were good toys to play around with, like something that may lead to an unexpected outcome in an experiment, but they weren't something that I planned to use myself.
If I became reliant on external sources of power to move forward, it'd be the same as my previous life, being chained down by things out of my control.
The moment my wheelchair, or Sacred Gear, in this case, gets taken away by someone, I'd end up as nothing more than an incapacitated cripple crawling on the ground.
'Oh, well, I'll decide what to do in the future... I'll have to add this in my Bucket list.'
While I was studying Sacred Gears, a rather weird theory appeared in my mind, which was further solidified by the history books.
Balance Breakers were the evolved forms of Sacred Gears when their powers fully awakened, something that was strong enough to kill a God in some cases, at least potentially.
To think that the Biblical God could create such things—how strong was that guy?
But my theory had nothing to do with his strength.
The interesting part was that Balance Breakers started to appear only after the Great War.
It was common knowledge that the Original Four Great Satans died during the Great War, so maybe they did something to the Sacred Gear system.
According to history, the most likely answer was simple, which I agreed with.
During the Great War, the Biblical God had died along with the Four Great Satans, and Balance Breakers were most likely a malfunction within the system caused by human desires also because of the vacancy left by Biblical God, the 'caretaker'. It was supported by how different people awakened different Balance Breakers known as Sub Species, a power similar yet different from the previous holders.
With the Biblical God's death, no one could correct this malfunction, making Balance Breakers a permanent thing within the system.
As for why this was not made public?
If others knew that the Biblical Mythology didn't have a God to protect it, it'd lead to a lot of chaos, and it might lead to invasions from other Mythologies.
Some Gods would spare no chance to increase their number of followers.
Not to mention, it'd most likely cause a riot among the Church's followers, diminishing the amount of faith they received.
But that wasn't important—I had more pressing issues than some dead side characters.