"Takama-ga-hara was a hidden divine kingdom concealed within the void. Unless one was received through the Gate of Reception, no one could enter it.
Being unable to enter Takama-ga-hara meant being unable to proactively erase that catastrophe. They could only passively wait for its arrival... In that case, Takama-ga-hara, polluted by the Red Moon, was like a Sword of Damocles hanging over Great Xia at all times!
And the key to changing all of this was the Magatsu Blade!
The Earthly Gods and Heavenly Gods had fought for countless ages, and they had specifically forged the Magatsu Blade to break Takama-ga-hara's advantage as a hidden divine kingdom.
The legend's mention of cleaving open Takama-ga-hara probably did not mean splitting the divine kingdom in two with a single strike. It meant that, once the Nine Calamity Blades became one, the Magatsu Blade could cleave open Takama-ga-hara's Gate of Reception!
That way, Takama-ga-hara, this hidden divine kingdom, would be completely exposed to the True World, and we could seize the initiative to destroy the catastrophe with our own hands."
After Lin Qiye understood all this, the grand scheme that the elderly King Mask had laid out by coming from the future and turning back time was fully revealed before him.
He had established a Time Loop in Fishing Village, sealing away the Bake-kujira tainted by the Red Moon's aura and forcibly delaying the catastrophe by over fifty years.
He had sent Baili Pangpang back more than fifty years into the past, having him keep the Yata no Kagami from being polluted by the Red Moon while splitting up the Nightfall Squad and sending them into Takama-ga-hara's "Human Circle" in batches, advancing the fusion of the Nine Calamity Blades and reversing Great Xia's passive position to counter Takama-ga-hara!
The elderly King Mask understood