(As a reward for swearing loyalty to the Thunder Oath, afterward, Augusta and Walburga were given the opportunity to browse the Infinite Sanskrit Grimoire.)
It was honestly hard to believe, but the two beauties—Augusta and Walburga—cleared the secret realm far faster than the Ice Princess Laviraya did.
With Laviraya, Sai Akuto had spent five days. But with this pair of witch mages, he spent only one night—more precisely, less than an hour.
After learning the intelligence surrounding the Infinite Sanskrit Grimoire and hearing the truth behind it, the witch-mage pair, Augusta and Walburga, swore loyalty to Sai Akuto. After that, the two of them took action as well, scrambling to take the initiative and flatter him.
And once they had actively thrown themselves in, the four of them immediately told Sai Akuto all of his next plans and goals.
Yes, Sai Akuto only had to admit this much: witches—although they might not match "proper" beautiful girls like Lilith and Asia in pure youthful charm—still had a unique allure of their own.
Augusta and Walburga were both witches and female slaves, and each of them possessed the world-shaking power to see a goal through to the end. Once Akuto could grasp and steer that obsession, he naturally allowed them to give him their wholehearted devotion as witch master and disciple.
Augusta liked purple eye patches. Walburga liked wearing purple short-skirt dresses. Add to that Reino, who liked purple pantyhose.
Akuto didn't know whether they had subconsciously developed that preference under the influence of "Stage of the Purple Princess," but by placing them together on the same bed to [Reset] their magic power—
First, purple truly did have a certain flavor to it.
Second, the fates of similar people really could overlap.
Not only could two people be physically overlapped on the same bed, their fates could be overlaid as well—causing stronger power to erupt, and unlocking more possibilities.
…
After placing Augusta, Walburga, and Vit—three generations of Sacred Gear users from the original plot—onto one bed, Akuto gradually began researching the method of "Fate Overlap."
However, because "Fate Overlap" was an unfamiliar domain to both Akuto himself and the God of the Bible, the pace of his research progress was not particularly fast.
In the end, it was only under the Thunder Oath's guidance that Akuto found a method that achieved "Fate Overlap" with one hundred percent certainty.
All one could say was: research ability and personal strength did not necessarily scale in perfect lockstep.
For example, in the original plot, the rising Valkyrie Rossweisse—although her strength did not surpass the Devil King level—could still research taboo techniques that sealed away Beast Kings.
In fact, the witches of the Witch Soul had already demonstrated their attainments in spellcraft within the original plot.
During the Three Factions era, when the witches invaded the devil academy and, with additional support, used "Time Stop" to freeze time across the entire Dog King Castle, it was enough to glimpse just how deep the Witch Soul's mastery of time-type magic truly was.
If one insisted on comparing, then the "Magic Association" represented the highest organization for magical research, while the "Fallen Angels" represented the highest organization for research on their side.
And the "Witch's House" was precisely the witch group that had defected from the "Magic Association," possessing magical attainments that were not far behind it at all.
…
After experimentation, Akuto had already mastered a method to achieve "Fate Overlap" with one hundred percent success.
So long as the following conditions were met, "Fate Overlap" could be achieved, thereby enhancing both parties' magic power and combat capability.
Condition 1: They must be characters who appeared in the original plot, or their baseline divine strength must be at least at the demon level or above.
Condition 2: They must possess a fate or power nature that exists in the original plot. Broadly, it could be divided into three cases.
The first case: In the original plot, they possess the same Sacred Gear. For example: Barbara and Larea, Lilith and Gasper, Amano Yuna and Mitilt, Kakawas [Lotus Pod], and so on.
The second case: They possess similar power natures. For example: Barbara and Larea, Lilith and Gasper, Irina Shidou and Mami Shidou, Akame and Terasu, and so on, and so on.
The third case: They possess closely related bloodlines. For example: Barbara and Larea, Lilith and Kus, Irina Shidou and Mami Shidou, Akame and Terasu, and so on.
Actually, Condition 3 was not strictly necessary. Normally speaking, as long as the two parties in "Fate Overlap" formed a tacit understanding—like Lilith and Gasper did now—then most of the time, "Fate Overlap" could be achieved.
It was just that doing it this way took far too long, and the practical effectiveness was far too low.
The most time-efficient method was for them to serve as Akuto's partners for a period of time, build tacit understanding in bed, and—after filling their bodies with Akuto's symbiont—complete multiple rounds of "Fate Overlap" practice, then progressively advance the [100% Overlap] experiment.
So-called "Fate Overlap" was extremely similar to the Digimon world's "Fusion Evolution," allowing both sides to jump an entire tier in strength when fighting together.
After "Fate Overlap," the two parties' fortune and energy were layered together—equivalent to upgrading what would have been supporting characters into protagonist-grade existences.
Akuto was not without attempts to find someone who could achieve "Fate Overlap" with himself.
Unfortunately, his so-called "one whose fate cannot be seen" was someone the entire world could not find.
…
(Note: Such a person will appear in the future. It's just that they haven't been found yet.)
After completing "Fate Overlap," Akuto conducted "Fate Overlap" experiments on many people in succession.
First was "Augusta, traced back to [Elyia]'s original self."
These two witches both had deep research in the realm of souls, and also had relevant experience, making them the most suitable experimental materials.
Very quickly, with the two of them coordinating, Akuto completed the basic experiments.
After that, Akuto performed more advanced experiments on multiple people.
For example: Lilith and Gasper, Irina Shidou and Mami Shidou, Akame and Kurome, Gabriel and Morigoda… and so on, and so on.
Among them, Lilith and Gasper were already attempting to fuse their powers, so they were able to complete Fate Overlap through their fusion on the twelfth attempt.
After the two-person experiments came the three-person and multi-person experiments.
However, because three-person and multi-person experiments were far more difficult than two-person experiments, Akuto was still in the exploratory phase for experiments involving three or more participants.
Therefore, almost every night, Akuto would call the three—Augusta, Walburga, and Vit—to his bed to increase intimacy and proficiency, in order to complete the next stage of experiments.
…
In this way, Akuto conducted experiments related to "Fate Overlap," subdued the forces of the Four Great Old Devil Kings, and from time to time went to visit the resentful bird Juju [Reunion Bond].
And then, at last, the time came for the end of the "Instance Trial Run."
In order to unlock the "Synthesis Reward" function as quickly as possible, the moment the time limit ended, Akuto planned to head to the instance world and complete its conquest.
…
Before heading to the instance world, after Akuto was reminded by Augusta and performed [Clone Enhancement (Witch Soul)], he obtained unprecedented power.
A man's ultimate strength was limited. But if he added the help of a large number of witches to research, then he could bloom across fields and domains.
So Akuto transferred many witches who had pledged to him, and assigned them their respective research tasks.
Most witches pursued knowledge and spell formulas with near-fanatical zeal. So after learning that Akuto held the Infinite Sanskrit Grimoire, the vast majority of witches became feverish with excitement, crowding around Augusta and Walburga—competing to reach Akuto's bed as soon as possible.
After the number of witches Akuto had "had his fill of" reached a certain threshold, the system notification sounded in his mind.
[Confirmed!]
[Congratulations to the Host for completing the Soul Achievement — fully subjugating all members of the "Witch's Sabbat," including the two leaders (Red).]
[Congratulations to the Host for receiving the reward: Infinite Sanskrit Grimoire (Red).]
[Infinite Sanskrit Grimoire (Red): A legendary grimoire said to record all magic in the world, of limitless value! Even newly discovered spell formulas will be recorded within it.]
…
In the original DxD world, such a thing existed, but it was restricted to only a limited few.
The system-rewarded Infinite Sanskrit Grimoire can automatically record all spell formulas in this world whose quality does not exceed the grimoire's grade limit.
[Note: A Red-grade Infinite Sanskrit Grimoire can record all spell formulas up to and including the Dragon God tier.]
…
Since the ceiling of the DxD world is the Dragon God tier, the Infinite Sanskrit Grimoire—after being upgraded to Red grade—truly encompassed all spell formulas of the DxD world in a meaningful sense.
As for the very few spell formulas in the DxD world that exceeded the limit, they were either within the "Most Holy God's Knowledge Vault," or within the Most Holy God's "Sacred Affairs: World Saint."
All in all, after being raised to Red grade, the Infinite Sanskrit Grimoire could encompass more spell formulas, giving Akuto himself and the witch group under him enormous research space.
Indeed, one person's power was limited.
After "Witch's House" was officially turned into his research organization, Akuto had no intention of stopping.
Afterward, the leaders of the Three Great Factions and the Director-General of the DxD agency issued a joint statement, claiming that "the Witch's Sabbat organization has recognized its mistakes and offered compensation in the form of magical knowledge and techniques," and therefore the Three Great Factions would abandon any subsequent hostility or retaliation toward "Witch's House," and—under the Holy Spirit Holy Nation and Witch's House signing a [Sacred Covenant]—a consensus was reached.
At this point, "Witch's House" was thoroughly converted into a research-oriented organization.
Originally, this transformation did not cause much controversy, because the Three Great Factions—the direct victims—had already accepted compensation, and the other weaker forces that had been bullied did not possess the ability to retaliate.
But soon, the astonishing expansion speed of "Witch's House" shocked the entire world.
After learning that "Witch's House" could point to many lost spell formulas, all magicians went mad.
If "Witch's House" did not recruit only female magicians, then all magicians would have rushed to Witch's House to form a "formal Magic Association" there.
But even if it only recruited female magicians, estimates suggested that within a few months, the scale of "Witch's House" would surge to the point of surpassing the "Magic Association."
(End of Chapter)
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