Since the beginning of time, one has always climbed or descended the Tower by passing through a number of Floors via the Inner Tower. Each one contains different Tests. It is worthy to note that of the 134 conquered Floors, only two are ruled by a High Ranker that is not a member of one of the 10 Great Families or the Zahard Family. Those Floors are the 77th Floor ruled by Baek Ryun and the 2nd Floor ruled by Evankhell. Apparently, the Outer Tower of each Floor is roughly the size of the continent of America. Also there are two other Floors with no Rulers. Such Floors are the 1st Floor inhabited by Headon and the 43rd Floor after Enryu killed the Guardian.