The Naga-Kur (known as the Dead-Water Tribe in Tamrielic) is a tribe of Nagas, a rare breed of Argonian. However, they seem smaller than the pre-determined average size of others of their kind. Their village is known as Dead-Water Village and they control vast swaths of northern Murkmire and are greatly feared by the Argonians of the surrounding villages. The Naga-Kur often adorn their weapons and armor with pieces of fallen comrades. To craft a weapon from the skin and bones of their warriors is considered an honor.
Natives were an insurgent group based in Skingrad County that operated sometime in the early Fourth Era. Known for their distinctive arrows and modes of attacks, such as beheading the people they ambushed. They were allegedly funded by the Thalmor.
The Nerevarine Cult, associated with the Urshilaku Ashlanders, believes that the Tribunal--the three god-kings Vivec, Almalexia and Sotha Sil--are false gods whose power is stolen from the Heart of Lorkhan. Instead of worshipping the Tribunal, the cult is devoted to a mortal leader who died of his wounds after victory in the Battle of Red Mountain: Lord Indoril Nerevar. Vivec was his lieutenant, Almalexia was his queen, and Sotha Sil was his wizardly advisor. The cult also believes that, in the end, Nerevar will return in a new incarnation (the Nerevarine or Incarnate) to reunite the Dunmer and bring down the gods they see to be false.
The Nightingale Trinity, usually called simply the Nightingales, are a trio of highly skilled thieves dedicated to the service of Nocturnal. Members are typically chosen from the higher echelons of the Thieves Guild. Although there is no formal association between the two factions and most guild members are unaware of this arrangement, the Trinity is usually very influential on how the guild operates (Nightingales even claim to be the source of the guild's phrase "walk with the shadows").
Members of the order take the Oath: the Skeleton Key must remain at the Twilight Sepulcher, the Temple of Nocturnal, which must be protected from all threats, even in death, until Nocturnal accepts the spirit of a Nightingale into the Evergloam, her plane of Oblivion. In return, Nightingales use the abilities granted to them for whatever they see fit to do in life. Contrary to popularized misconceptions, the Oath is considered a business transaction rather than a religious matter. While most members certainly take the Oath very seriously, they are not worshipping Nocturnal as a deity, but respecting her as the patron of thieves.
- The Infernal City — Gregory Keyes