The Lotus Sword Mansion was not a mansion at all despite it being called a mansion. As a matter of fact, it looked nothing like a mansion at all and was just a portal in a little known valley that was situated between the treacherous mountains.
The reason why it was called the Lotus Sword Mansion was because a heaven-step divine sword with lotus mark was one of the first profound treasures that were found within the place. As for why it was called a mansion, it was because it was a mansion of profound treasures when it was first investigated by the ancient celestials.
But of course as time passed by, the profound treasures that could be found become less frequent and the competition for the profound treasures would also intensify.
However it did not defer the courageous and competitive cultivators.
