Fort Rushuin

Fort Rushuin is a place which may only be unlocked upon attaining a Character of Level 50 and Rank 11.

Once you reach LV50 and Rank 11 with a Character, speak to the Guy(ランヴァン:Lanvin) at the Hunter Union and then head to the Docks, where a single Guy(ライアル:Ryal) would stand at the far End of the Docks.

The Guy (Ryal) will give you a chain of Quests which need to be completed, once done he will permit you to travel to the Fort Rushuin.

To Complete the Final Mission, which desingates the End-Game content so to speak, you need to craft a very special LV40 Ring (Dispell Ring) which will give you a Class Skill (Dispell) upon equipping.

This Class Skill is needed at the End Boss to dispell his Immortality Aura.

In Fort Rushuin you will gain Access to New Missions, as well as extremely powerfull "Green Equipment".

Green Equipment is much stronger equipment compared to the regular Counterparts. As an example, all Green Weapons possess 5 Weapon Skills, as well as Rings.

Green Armor pieces give bonuses such as Auto-Ressurect, which will be used once per Mission as soon as you die. (Get from 3-Piece LV5 Plate Set).

Another example is LV15 3-Piece Cloth Set, which will give additional Skill available for every Weapon.

So if you could use only 4 Skills of a Rapier, Sword and a Saber as a KNT, now you can use all 5.

More over in Fort Rushuin you may rise up to the maximal Rank 15, with Rank 13 you can unlock your Fourth Class (NIN, SDM, PLD... etc). Also new Mission Type will be introduced to you there as well as extremely difficult 6 Person Missions which reward outstanding Green Equipment.