
The dungeon (ダンジョン) is a complex labyrinth used by the students of Regarden Magical Academy and the Upper Academy.
Information[]
The dungeon is a vast multi-floored area inhabited by various types of monsters. The dungeon itself is seemingly alive, spawning monsters from walls and ceilings.
The dungeon is used by students of Regarden Magical Academy in order to gain practical training credits required for their graduation and by students of the Upper Academy. To make sure that Regarden students don't get in over their heads fighting monsters they can't defeat, the 7th through 10th floors are kept off limits except for students with permission or those participating in practical training. The 11th floor and below are restricted to High Mages: the exact depth remains unknown, although the furthest explored floor is the 49th.
From time to time, the Upper Academy issues requests known as orders (
When monsters from a lower floor appear on a high floor, it is known as floor up (
Domain of Trails (ch.47)[]
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Floors[]
Entrance[]

The entrance to the dungeon is known as the Abyss Gates (深界の門). The actual entrance to the dungeon itself is seemingly through a massive door located in a room with a checkered floor and pillars.
4th Floor[]
The 4th Floor is covered in ice and is home to ice type monsters like Frost Walkers.

6th Floor[]
The 6th Floor is the final floor that Regarden students can go to without permission or outside of comprehensive training. The area around the entrance to the 7th Floor is vast and the entrance itself is a massive hole leading downward. Camps are set up on the 6th and 8th Floors (possibly on the other floors as well) as safe zones in case students need help for want to return to the surface during the comprehensive training. ==
10th Floor[]

The 10th Floor is the final floor a student of Regarden can officially venture to. Its floor keeper is the Luminous Naberus, an extremely dangerous monster known for many student deaths.
11th-15th Floor[]

These floors are known as the Nightmare's Maw (悪夢の腸). The strength of the monsters and the layout of the floors are far stronger and complex than the previous floors. Only high mages of the Upper Academy are allowed to set foot past this point.