In other words, this world exists in such a form; it must have both inside and outside, and it cannot lack either.
Given this, even at the peak of the time when the three holy swords were in the source, the Abyss was only sealed, not completely isolated. Otherwise, the Abyss couldn't pay the huge price to open the door between two planes and launch a full-scale invasion of "that empire," destroying it.
Therefore, theoretically speaking, it's impossible to completely isolate the two planes.
Of course, if the goal is just to close a passage, this sacrificial ritual can still be done.
So, when Beluti saw Reiger stepping onto this black land, directly facing the incoming army from the Abyss in front of the Abyss Gate, she resolutely made the decision.
She decided to sacrifice herself, performing the ritual to completely close this Abyss Gate.
From the very beginning, Beluti came with the intention of sacrificing herself.
"Saint Beluti...!"
"You...?!"
