Atlantis, the Sunken City Edit
The history of Atlantis was lost as generations passed for Arcana. No one, not even the elves, recall what had caused the city to fall into ruin. Archeological research has been conducted within the city, but nothing of value nor any information has been found.
Ur's arrival in Atlantis seemingly caused the awakening of its 'inhabitants', namely her summons. The reason for this is unknown, but it is believed that Ur could be a descendant of the rumored Atlanteans.