@Ren-chan Golems, security function, walls that turn into passages, characters deducting it was man-made.
Didn’t necessarily have to be a security camera, but a magic equivalent like a crystal ball. The entire labyrinth and the monsters in it seem to be artificial. My guess is someone got locked in before Nick’s party and has been trying to open up passages and deactivate security so adventurers would be able to invade and potentially rescue him.