Arks

Sanctums found throughout Aincrad that contain the relics of ancient elven saints. The Guardian that protects each relic is sealed along with it, and is said to bring misfortune to any who dare release them. Some researchers believe that Arks are a test to see if any can remove the fetters that bind Aincrad, and when all have been severed, the path to all of Aincrad will open.