Thul-Ar, Acolyte of Nokris

Thul-Ar, Acolyte of Nokris is a Hive Lightbearer Acolyte once known as a servant of Nokris and now commander in the Lucent Brood. They can be encountered as a boss in the Ghosts of the Deep. Killing Thul-Ar is a paramount to collecting the catalyst for the Navigator.

Gameplay
To summon Thul-Ar one must first acquire the Navigator Exotic Trace Rifle and will need a Vestige of Light buff which is obtained by interacting with dead ghosts, which has a time limit of a minute and twenty seconds. Then you arrive at the Hive Statue which is located on top of a large rock. You interact with the statue and the first encounter begins. Thul-Ar has a shield making them immune to damage. To deal damage to the boss the player must observe the Hive symbol above the boss, three Runebound Visage Wizards will spawn and one has the same symbol as Thul-Ar. Once the Wizard is killed you will gain the Piercing Light buff which will allow you to destroy the immunity shield and deal damage. When enough damage is done the first phase is complete.

Starting the second encounter bears little difference from the first. The player must arrive at the underwater caves where the statue resides. Then you must kill a horde of Revenant Acolytes and two Blistered Knights and then enter the underwater cave. When you enter the cave you must kill enemies to interact with a pile of dead Ghosts to gain the Vestige of Light, and then interact with the statue. Kill the Runebound Visage Acolytes with the same symbol as Thul-Ar and repeat the process until enough damage is done to complete the second phase.

After defeating Ecthar you will arrive at a traversing area with platforms. Near the entrance at the right tower with the fallen lantern is a pile of dead Ghosts to gain the Vestige of Light. When traversing the platforms beware of enemies including Luminous Eyes, Blistered Knights, and Acolytes. Arrive at the main platform and interact with the statue to start the final encounter. The final encounter remains the same except that there are now Runebound Visage Knights instead. Once Thul-Ar is defeated you can loot the chest and move on to the final encounter.

Appearance

 * Destiny 2: Season of the Deep