A Soul Repository is a large room, or building, completely lined with Soul Tear dust. At least 20 cm thick. Specific rituals are performed on the room to ensure safety, and these are repeated at certain intervals. A soul can be moved from a Soul Jar into a repository using the Move Soul cantrip.
Many repositories promise that the souls have some semblance of a new life inside these repositories, but rumors say that its more like a nightmare, than a dream.
Souls will not warp in a repository, but will ever so slowly, deteriorate, and at some point fade, and fizzle out into nothingness.
The Wyrding of Northhelm disaster is rumored to have been centered on one of the biggest Soul Repositories in Zarthuga.