During your many adventures, odds are you will notice at some point or rather a Mysterious Stranger in the back of the tavern. If you talk to this strange character, the same who speaks in nothing but riddles, after just beginning your journey, he will ask that you return to him only after you have achieved a Level 5 Reputation with all three of the initial Trading Companies.
However, after achieving a Level Reputation will all of the Trading Companies and returning to this odd figure, he will then tell you to come back after reaching a Level 10 Reputation for each. Should you come back to him after accomplishing such a thing, this riddler will then request for you to return to him after your have a Level 15 Reputation with the Trading Companies. Believe it or not, he will do this same thing over and over until you have reached a Level 50 will all three of the Trading Companies.
Once you have reached a Level 50 Reputation will all three of the Trading Companies, have unlocked all of the Pirate Legend Gear by doing so, and have officially obtained the Pirate Legend Title by wearing said articles of Clothing, you can return to the Mysterious Stranger to receive what is known as the Pirate Legend Riddle:
"Through many Voyages upon the sea, you searched to find the legends key...
Now one last step to pass the Tests, to find where Athena's Fortune Rests...
Take this tune and make a sound, the secret lies near in the ground..."
After receiving this riddle for the stranger, remain in the tavern and walk towards the wheel on the wall near the staircase is disrepair. From there, play the special song you just received from the man with this specific riddle in order for the floor below to open.
Once the floor has opened, you can walk down the staircase to reach the fabled Athena's Fortune. This is a special area where you will actually find other Pirate Legends having a good time. Players that haven't yet earned the Pirate Legend Title will be allowed to enter with you; however, they won't be able to buy anything in this area like you will be able to do.