History of Dredgen Sere

Overview

Dredgen Sere is the final boss of the Equilibrium Dungeon. He uses Arc and Taken energy to rip open his own throne world and become functionally immortal.

Encounter

The fight alternates between the normal arena and a Shadow realm. A 45 second timer forcibly teleports the fireteam between them. In the real world you destroy five Taken orbs (defeating Nameless Apprentices makes this possible) while Arc pylons flood the midfield; in the other realm you "compel" five Blistered Shadows using the Shadow Master buff. Doing both opens the damage phase. Shooting his hands stops his lightning attacks.

Notes

Shacknews recommends a Warlock with Well of Radiance and burst damage such as rocket launchers. Sources agree on the broad mechanics; details such as the timer are from one guide.