The Lost City of Amdapor
The Lost City of Amdapor is a level 50 dungeon released in Patch 2.2. It requires a light party of 4 players with minimum iLvl (Item Level) of 55 or higher to enter. Yoshida-san mentioned that it will be the hardest 4-man dungeon in game. Players should have completed the quest The Ultimate Weapon and be on the quest One Night in Amdapor.
Born in magic, the ancient city of Amdapor lived in splendor and died in agony. As the Fifth Astral Era gave way to the Sixth and the ensuing catastrophe, the agent of Amdapor's destruction slept. Now, the seal that has held so long is softening like windfallen fruit─and what blind worms writhe behind the skin of the dead city?