The village of Oerth was savaged by a brutal warlord, Mortor. The villagers gathered what little gold they had and hired seven swordsmen to defend the village and kill Mortor. They did and then stayed in the village and opened a school.
There are only seven masters of the tower of Oerth. They do, however train any who come before them who they deem worthy.
Joining the Masters
Many are trained under the Masters, many become great swordsmen/womane in their own right. Some call themselves masters. But for one to join the tower of the masters, you must face the trial of the tower.
The sword masters have but one santuary, the Tower of Oerth