"Even though you guessed wrong, it's already very close."
Rias smiled and said, "Just a reminder, this crystal is a technique I unleashed~"
"A technique... a crystal. Could it be a magic crystal used to replenish mana?"
Sirzechs guessed, then rejected that judgment. "No, if it were just something of that level, Little Rias wouldn't have this kind of reaction."
"Could it be a seal?"
"Bingo~" Rias snapped her fingers and said, "Want to guess what's sealed inside?"
Sirzechs and Grayfia continued to think, and then their hearts suddenly skipped a beat.
What was sealed inside could be an object, or it could be... life.
And Rias had already given a hint before, which was... it's related to Grayfia!
An object or person related to Grayfia... Could it be... The two looked at each other, both seeing the look of shock in the other's eyes.
"Euclid?"
Sirzechs asked tentatively.
"You actually guessed right. As expected of a Devil King, your mind is quite sharp~"
Rias laughed mischievously.
Having said that, Rias snapped her fingers.
The red crystal turned transparent, revealing a hideous-looking Euclid inside.
"Just to clarify, I didn't abuse him. He just had that expression when we met, and then I sealed and froze him in place."
It really was Euclid?!
Sirzechs and Grayfia were shocked, momentarily dazed on the spot.
Seeing their reaction, Rias also felt a sense of pleasure in her heart.
"Not long after the victory of the Devil Reformist Faction, Euclid approached Rizevim with a certain piece of information."
Rias said, "The entity once sealed by the God of the Bible, a Sub-Dragon God Level existence far stronger than a 'Transcendent'—Beast Emperor 666."
"It could be said that the reason the God of the Bible died was because He exhausted too much power sealing Beast Emperor 666, then encountered the two Heavenly Dragons disrupting the Three Factions' battlefield, and was finally dragged down to mutual destruction by the Old Devil Kings."
"And Euclid collaborated with Rizevim. The latter's goal was to control Beast Emperor 666 to invade the Other World, while the former's goal..."
Rias looked at Grayfia.
No one should understand her own younger brother's thoughts better than she did, right?
Grayfia lowered her head, while Sirzechs became completely serious.
This kind of news is absolutely not something that can be talked about while playing around!
Sirzechs was somewhat between laughter and tears about this, but there was nothing he could say.
"Just leave this guy in the living room at home. When you feel it's okay to let him go, give him a minute or two of fresh air."
Rias smiled, then took out a key.
"Just recite the incantation and the key will activate, releasing him. Recite it once more, and he can be sealed again."
Taking the key, Sirzechs thought for a moment and then asked, "Although I had some expectations, even I couldn't have imagined that Rizevim would plot something so dangerous..."
"Hmph, he's completely looking for death."
Rias sneered, "The EXE World has long passed the era of mythological hegemony and is starting wars against the outside. Never mind Beast Emperor 666, even all the Dragon God Level beings combined wouldn't be enough for the Three Evil Gods to fight."
Sirzechs and Grayfia looked at each other and then became serious.
Setting aside Rias's source of information, just the matter she revealed was already extremely terrifying.
The Devil King level generally corresponds to the Chief Gods in mythology, including figures like Zeus and Odin, who all fall within this range.
Among them, some existences far exceed the scope of mythological life; they are those who have grown over a long period and surpassed their original limits, known as Transcendents.
And 'Transcendent' has two meanings: one is surpassing one's own racial limits, and the other is the level of strength of a Transcendent in 'High School DxD'.
And what surpasses the scope of a Transcendent is the legendary Dragon God.
Ophis, the Infinite Dragon God who firmly holds the throne of number one in the world, and the Great Red, who is not ranked within the world but wanders forever in the Dimensional Gap.
And according to Rias, Beast Emperor 666 is on par with a Dragon God... no, it's an existence slightly inferior to the Dragon God Level, which she calls Sub-Dragon God Level.
And such existences, even combined, are not enough to fight the Three Evil Gods of the Other World.
This is extremely bad news.
"However, there's no need to worry about the matter regarding Rizevim."
Rias looked at their expressions and didn't continue to joke.
When the atmosphere becomes serious, cracking jokes is very awkward.
You can tell by looking at 486~
Although she doesn't act entirely based on the 'atmosphere', facing some scenes, it's really not suitable to joke.
"No need to worry? Could it be..."
Sirzechs's eyes widened.
"Body and soul included, he has been 'destroyed' by me until not a single bit remains."
Rias gave an indifferent sneer, making Sirzechs gasp.
One of only three Transcendents among the devils, died just like that?
"I have some business to attend to next, so I'll be going now~"
Rias shrugged, then waved and left.
Using Heavenly Transfer for spatial movement, in the absence of resistance, the Earth is incredibly small.
Watching Rias leave so decisively, Sirzechs rubbed his brow with a bit of a headache.
There was too much information, leaving him dazed for a moment.
He needed to take a breather.
On the other side—
Using Heavenly Transfer, Rias moved through space to the lowest level of the Underworld.
The Underworld is not only home to the Devil race, but also to Fallen Angels and the Hells of other Pantheons.
Among them, the particularly powerful one is Hades of the Netherworld.
Although he's just a skeleton, this guy is very similar to the second Espada among the Ten Blades, Barragan Louisenbairn.
Only the level of power is different.
Hades is a Transcendent!
Not only is Hades stronger than Zeus, who is a Chief God, but unlike the greek mythology of other worlds, the Hades of this world is not the only conscience of greek mythology, but a major ambitious figure.
In the original work, after Rizevim died, this guy took over Rizevim's research institute and used the notes left by Lilith and the First Generation Lucifer to forcibly create a hundred thousand devils, including two artificial Transcendents.
A villain from beginning to end, he was never redeemed until his death, and was subsequently captured by invaders from the Other World and taken back to be transformed into a Machine~
"Found it."
The deepest part of the Underworld, Cocytus.
Rias walked in and then took out the 'Book of Lucifer' left by the First Generation Lucifer.
Besides this book, there was also the translation by Lucifer's son, Lilin—Rizevim, who used modern methods to achieve the production of devils through current technology, mana, and magic.
That being said, Rizevim himself only wrote down the methods and did not produce any research results of the century, nor did he conduct experiments on his own mother.
Whether this was the last bit of conscience remaining in that evil devil is unknown...
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