History of Uul'nath, Lightcleanser

Uul'nath, Lightcleanser is the final boss of PsiOps Battleground: Cosmodrome, a Lucent Hive Hive Lightbearer who ran an operation to stockpile and purify Light for the Lucent Brood.

Overview

Destinypedia lists Uul'nath as a Lightbearer Knight Lieutenant of Ultra rank, debuting in Season of the Risen (22 February 2022). He wields an Arc Boomer and Void Suppressor Grenades, and can summon Void Sentinel shields, a Towering Barricade, resurrect allies and teleport.

Encounter

After enough damage, allied Cabal Imperial Psions freeze the boss and pull the fireteam into the Mindscape, where Aspects of Savathûn appear at each third of his health and can only be harmed with the Synaptic Spear relic.

Notes

Sources agree he is a Knight; the wiki request note called him "Lucent Hive". Also see Mor'ak for the PsiOps Battleground: EDZ boss.