All is prepared for the next phase of Operation Archon. Edelstein asks you to meet with General Raubahn at Castrum Meridianum.
This quest is available if you have completed the quest Hearts on Fire, and have reached level 50.
Starting the Quest
Talk to Edelstein at the Ceruleum Processing Plant in Northern Thanalan to begin the quest.
Speak with Raubahn
Go northwest from the Ceruleum Processing Plant toward where the orange arrow is pointing in the minimap. Talk to Raubahn and there will be a cutscene. Afterward, Castrum Meridianum is unlocked in the Duty Finder and Duty Support.
Use the Duty Finder or Duty Support to enter Castrum Meridianum. Please see the Castrum Meridianum Guide for a walkthrough.
Report to Raubahn
Talk to Raubahn to complete the quest.
Next Main Scenario Quest
After you complete the quest, talk to Raubahn to accept the next quest: The Ultimate Weapon.