The stream

Amporion's first glimpse of the stream

The Stream is a chemical binder of all mass in the universe. It is the only continuant entity that exists past every World Reset. While the surrounding fog of the stream represents the majority of most of the mass in the world, the stream it self is believed to be the sum of all souls in existence; both dead and alive. 

The location of the stream is unknown, but it's confirmed to be a real physical being somewhere in the universe. Its actual location has only ever been visited by Amporion

As the stream connects all mass to itself, it's also believed to show whatever happens to atoms everywhere in the universe. By visiting the stream, one is believed to gain a reasonably large glance into the future of everything.