Underground city, 44th floor.
This is a floor with extremely high temperatures, as if being inside a volcano, so stiflingly hot that it feels like entering a steamer.
On this floor, the ground is mainly fiery red, with twisted rocks rolling around everywhere, and the walls of the maze are cracking and turning black, resembling charred coal. Through the cracks, a faint red glow can be seen, making one wonder if there's lava flowing inside these walls.
And the monsters active on this floor are primarily classified as Lv.4 rock beasts — Flame Rock Beasts.
Yes, the same source monsters of the forbidden fire stones used by the Death Soldiers to self-destruct on the 24th floor.