Grisvar the Unlucky

 is a prisoner in Cidhna Mine in Markarth (City) who has been in and out of the prison numerous times for stealing, and is now imprisoned for life.

After the Dragonborn speaks to Uraccen, Grisvar offers the player a shiv in return for a bottle of Skooma, which can be pickpocketed from several other characters in the mine. The shiv can be used to bribe Borkul the Beast into opening the door to Madanach's cell.

After speaking to Madanach, the player is instructed to kill Grisvar as he has outlived his usefulness to Madanach.