During Syl's related quest, Herdir will follow as an assistant. He will use his talents of inflicting pain to extract information from anybody who refuses to be open about what they know about the planned assassination of Syl.
When commanded, Herdir will shock the victim, and will continue repeat this until told to stop. Once the assassins are stopped, he will return to his chambers to resume his job.
- Herdir was meant to play a larger role in his related quest. He was supposed to be-able to take and "interrogate" the citizens of Dementia in his torture chambers.
- If the player fast travels out of New Sheoth while Herdir is following them, Herdir will disappear from the game.