Since there weren't any more enemies that were coming to them, the brothers walked leisurely. It was strange in a dungeon that all the monsters were coming at the beginning of the floor, but not every dungeon had the same process, so it could be said that this dungeon was a little strange yet special.
But there wasn't any need to think about that. People usually never thought of those types of things. They were to focus on the monsters and how much XP they could gain from them that they never thought of how a dungeon came to be, or how it was even there to begin with.
Not every planet had magic power in them, but no one ever questions themselves about those power, and why there were on a certain planet and not the other. Nobody except the few that wanted to know the truth. But it's not like they had found anything, even a clue, there was nothing. Absolutely nothing about these topics. It was strange, but it was also why people were so eager to find the truth.