Zatocc, Devoted to the Witness

Zatocc, Devoted to the Witness is a Psion Flayer of the Shadow Legion that acts as the warden for the Shadow Legion Prison of the Cosmodrome. They guarded the many prisoners brought into the facility by the Legion. They predicted the arrival of a Fireteam of Guardians and prepared several ambushes, but the Lightbearers still slew them in a fierce battle.

Gameplay
Zatocc is the final boss of Defiant Battleground: Cosmodrome. The Psion first appears after the fireteam manages to survive the ambush it set up, and will quickly expel them from the facility with its powers. After the Guardians make their way back inside, they will find Zatocc alongside several Cabal and Psion reinforcements. Zatocc tends to keep their distance, knocking back close foes before using their thrusters to dash away and fire their Cabal Headhunter from a safe area. Once they lose a third of their health, Zatocc will activate an immunity shield and fill the area with Dark Fetor, which will quickly start to damage the Guardians. Planting a Balefire will create a safe zone, and prompt the appearence of hordes of Taken. Players must seek the glowing Ravenous Taken Vandals among the foes and purify their essences into balls that can be thrown at the Devoted to break their shield. Once the shield is broken, Zatocc will be damageable for another third of their health, after which they will again expel the fireteam. Once the players find their way back, the purification of essences must be repeated again, this time at a new Balefire, in order to bring down the Psion's shield one final time. This will also disperse the Dark Fetor, and prompt the Devoted to summon more reinforcements. Draining the last third of Zatocc's health will complete the encounter and activity.

Appearance

 * Destiny 2: Season of Defiance