Then, Greater Lord Rukkhadevata began to recount what had happened back then.
Greater Lord Rukkhadevata: "On the day it happened, even the sky turned this color..."
"It really was the Khaenri'iah Cataclysm." Traveler Aether muttered, unsure if he had spoken aloud or just thought it in his mind.
"At that time, all the Archons except myself were summoned to the nation called Khaenri'iah, while I was given another, far more important task. And that was—to protect Irminsul."
"The arrival of the disaster came with the contamination of Forbidden Knowledge. At almost the exact same moment, my consciousness, which is connected to Irminsul, sensed that something was amiss."
"Mental agony began to torture me. By the time I rushed beneath Irminsul, it was already being eroded by Forbidden Knowledge."
"If King Deshret and I hadn't dealt with the contamination of Forbidden Knowledge together a thousand years ago, I'm afraid I would have been completely helpless at that moment."
Nahida: "Forbidden Knowledge... what on earth is it?"
"It is knowledge that does not belong to this world, and also the 'truth' that cannot be comprehended."
"It comes from the bottom of the Abyss, and even I cannot understand it."
[Layla: "What? Does knowledge that even the God of Wisdom cannot comprehend really exist?"]
"The world was constantly 'rejecting' it, but that very rejection caused the world to develop all sorts of bad 'symptoms'."
"If we had allowed Forbidden Knowledge to continue contaminating Irminsul, I'm afraid the entire Teyvat would have fallen apart."
Paimon: "To think there really is knowledge that even the God of Wisdom cannot understand..."
"I knew then that by my own power alone, it was simply impossible to expel the Forbidden Knowledge."
"So I created a device that integrated human wisdom, and named it the 'Akasha'."
Nahida: "That truly is the most remarkable invention in the world."
"Hehe... Thank you. For a long time, I believed that dreams were the crystallization of human wisdom."
"Although it was somewhat selfish to do so, I still used the Akasha to borrow people's dreams. I integrated the wisdom of the people and then contributed all of my own power..."
Paimon: "How did it turn out?"
"Thanks to the wisdom of the people of Sumeru, almost all of the Forbidden Knowledge was cleared from Irminsul."
"However... things did not go as smoothly as I had anticipated. A sudden headache brought a bad premonition..."
"I suddenly remembered that my consciousness is linked to Irminsul. Irminsul brings me knowledge and wisdom, but the contamination found me as well."
"From the very beginning... my very existence had already been contaminated by Forbidden Knowledge."
Paimon: "Ah... How could that be..."
Nahida: "I have witnessed that kind of pain in your consciousness. That must have been a terrifying experience, right?"
"Yes, but by comparison, my own feelings are not important. What matters is..."
"Even if I die, my existence and everything related to me will still be preserved in Irminsul as memories and knowledge, and then the Forbidden Knowledge will never be completely eradicated."
"And I... can never 'erase' myself. This is a paradox."
"Therefore, I snapped off the purest branch of Irminsul to serve as my reincarnation, and left behind clues..."
"All so that you could come here and completely erase the contaminated me from Irminsul..."
[Nahida: What? Erase... I can finally be certain. Originally, all of us knew Greater Lord Rukkhadevata, but now we've all forgotten her......]
[Nilou: Lord Archon, it's alright. Don't we know now?]
[March 7th: Wait a minute, wouldn't that mean that so-called Forbidden Knowledge is back again?]
[Nahida: Um...]
[Tighnari: This...]
...
[Ding! Considering the special nature of Teyvat, Teyvat users can only speak within the chat group; they cannot say it or write it outside the chat group.]
[Venti: Hehe, good thing there's a chat group.]
[Neuvillette: Indeed, this is best for both us and ordinary citizens.]
Then the video continued to play.
Nahida: "...Wait, no... No... This isn't right...!"
"Hehe, do you understand what that means? It seems you really are smart."
"Just as you thought, all the knowledge and memories of this world exist within Irminsul..."
"If you erase me from Irminsul... it will be as if I have never existed in this world at all."
"But... this is the only way to truly save Irminsul."
Nahida: "People love you so much, everyone has been missing you on and on, I... I too... how can I... just forget you like this..."
"Is there really no other way? Is there nothing else I can do?"
"You are the God of Wisdom, Buer. You should know. There is no other way besides this."
"But... but... this is too cruel. I don't want to forget you..."
"Don't be so sad, Buer. As a wise person, you should enjoy the joy of finding the answer at this moment."
"This is the answer you have always been searching for, the words to know the whole picture..."
"'Let the world completely forget me.'"