In this cruel universe, beyond lay raging storms of the sea of stars, indescribable higher-dimensional beings, and the "Abyss," which, like a virus at the lowest level, could devour everything.
Back then, primordial Phanes had used his own great power to forge a "planetary-scale fence" to protect humanity—the eggshell of Teyvat.
This eggshell was divided into an inner and outer layer.
The outer layer was called the "Boundary."
It was an absolute firewall, both physical and conceptual. It was precisely because the Boundary held firm that the Abyss's tidal surges from outer space and that incomprehensible Forbidden Knowledge could not recklessly pour back into Teyvat.
Back then, Natlan's Boundary had suffered only a tiny breach, yet it had cost the entire nation of fire countless lives. Even Ronova, the Archon of Death, had to personally step in to patch it.
The inner layer, meanwhile, was called the "False Heaven."
It was the eggshell's inner wall. Not only did it anchor the fates of all living beings in Teyvat, it also served as a sheet of light-blocking glass. It concealed the true cosmic sea of stars, sparing the people of Teyvat from directly witnessing the horrifying truths beyond the sky that were enough to drive one mad.
The Boundary was the security door, and the False Heaven was the load-bearing wall.
Only by complementing one another had the two allowed Teyvat, this fragile miniature universe, to barely survive for countless epochs amid the perilous sea of stars.
And now?
That guy in the ridiculous golden rabbit costume had actually torn down the security door—and smashed the load-bearing wall while he was at it!
Teyvat's Boundary had already been growing increasingly fragile over the past two years, and now someone was adding fuel to the fire?
Without the Boundary and the False