Pharos Sirius is a level 50 optional dungeon in Final Fantasy 14. Originally added in patch 2.1, Pharos Sirius will have you exploring the abandoned lighthouse of Limsa Lominsa. In the Calamity, Bahamut's destruction corrupted the aether-powered lighthouse, forcing the Lominsans to abandon the beacon.
Related: Final Fantasy 14: Amdapor Keep Dungeon Guide
Now, rumor has it that a Siren has taken up residence at the peak of the lighthouse, with an army of corrupted pirates at her disposal. It's up to you and your fellow adventurers to ensure the Siren has sung her last. Let's take a look at each boss you'll face in Pharos Sirius, their attacks and mechanics, and how to beat them.
Pharos Sirius is unlocked through the following side quest.
This quest will appear after reaching level 50 and completing the Main Scenario Quest 'The Ultimate Weapon'.
In the rooms following the first boss, corrupted crystals will drop from the ceiling and land on the path. Then, these crystals will periodically explode with Aether Detonation, dealing damage in an area around the crystal. Quickly move through these areas and pull any enemies away to reduce the damage you take from Aether Detonation.
After the second boss, you will enter a large staircase with an Aether Valve at the top and bottom of the staircase. These will periodically unleash clouds of corrupted aether, which will explode if it comes into contact with a player. Interact with the Aether Valve to close it and stop the corrupted aether from appearing. Additionally, you'll need to close both valves for the third boss to appear.
The first boss of Pharos Sirius is Symond the Unsinkable. Several of this boss's attacks will apply the Corrupted Crystal debuff. This debuff can stack up
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