Valkyn Skoria is a giant Dremora whose clan is based at the Knives of Discord, a region of the Deadlands. He serves Mehrunes Dagon as a Valkynaz (or 'prince'), a member of the Valkyn, Dagon's personal guard. Skoria rules over Red-Zeal Keep, a Sigil Keep found in the Knives of Discord region. The fact that a Valkynaz is posted away from Dagon's side would imply that the region is of particular importance or interest to the Prince.
In an attempt to enhance the destructive power of Skoria, Dagon experimented with mutating his vestige by imbuing it with certain aspects of the Flame Atronachs of Infernace. Although successful in this regard, the mutation forces Skoria to remain in close proximity to magma at all times in order to maintain his molten condition, and also means that he eternally suffers the agony of immolation.
In 2E 582, Bosmer cultists opened an Oblivion Gate in Whisper Grove in Valenwood that allowed a Daedric invasion from the Knives of Discord. After the death of the cult leader, Razor Master Erthas, Dagon proposed to seal the gate in return for the potential service of another Bosmer named Gilraen. However, Gilraen's husband Fingaenion reopened the Gate later that year in a failed invasion attempt in order to rescue her. Skoria's minions took the trapped invaders as prisoners, but Fingaenion managed to find a group of Undaunted and launch a second rescue mission. The group sliced through the Deadlands and eventually forced Skoria to face them in battle, where he was defeated. The keep's Sigil Stone was then taken, permanently severing the link to Tamriel and likely causing significant destruction in the region.