Nystrom was a man looking for riches along with his partner Anders inside the Twilight Sepulcher. They pretended to be priests of Nocturnal in order to reach the valuables, which Anders said were found inside Pilgrim's Path.
While undercover in the Twilight Sepulcher he was assigned a mentor, named Lythelus. Nystrom was prying about the obstacles in Pilgrim's Path and managed to coax information out of Lythelus. However, the information itself was in riddles. He planned to meet up with Anders to share what he had learned so that they may attempt the obstacles. Anders instead killed him and left his body in the first room of the Twilight Sepulcher, where Nystrom's journal still rests. Beside to his remains lies an enchanted leveled war axe.
- Nystrom and Anders is a reference to Swedish guitarist Anders Nyström, who founded the metal band Katatonia. In Nystrom's Journal, the phrases Lythelus mentions are the names of a Katatonia album and track.