The bumpy, tunnel-like passageway that looked as if it had been dug by hand had now changed into one seemingly carved from marble. The ceiling, which was once low enough to force large summons to lower their heads, had gotten higher. If the old Fortress had been like a crypt with narrow passageways, then the new Fortress was almost like a large castle.

[The Naga’s Fortress has completed its preparations to greet its Master, who has ascended to the title of Highlord.]

[The Naga’s Fortress has evolved into a Grand Labyrinth.]

[The Grand Labyrinth is completely different from other ordinary labyrinths. The existing grading for labyrinths, which has been the standard and the limit for growth thus far, is meaningless in the presence of the Grand Labyrinth.]

[The labyrinth’s grade has been reset. It has been changed from a Level 7 Labyrinth into a Level 1 Grand Labyrinth.]

[The Grand Labyrinth, which has not appeared in the Underworld since time immemorial, has tremendous power just as the legends say. Its existing boundaries that were artificially limited have completely disappeared, and a huge area has been incorporated into the realm of the Grand Labyrinth.]

[The Grand Labyrinth is currently relatively helpless compared to its size. It will take some time to manifest the full glory of the Grand Laby...