Take down the undying Knight again.
- This time, you will encounter Takul-Dar, the Unbreakable and 2 Necromantis Wizards.
- Fighting through them, the Thrall and the Acolytes that are slowing descending down the stairs in the back of the room.
- Fight through the Hive and kill the Necromantis wizards.
- Once they are down, clear out any additional Hive giving you trouble.
- Finally, focus on Takul-Dar and bring them down.
- The Yellow light will emerge from the Knight once again and head yet deeper into the Arcology and the Festering Halls.