apparitions

1. They are the 'Mirror Beings', born millennia ago of the Void and the Sacrifice. 
2. We see them as humanoids because our brains process them this way. That's also the reason why we catch their glimpse with peripheral vision, while other creatures could perceive them differently.
3. For example, Unascended Minds recorded Apparitions as 'whispers in the input code'.
4. The Chromium Sage has invented the Mirrorscope to either study the Apparitions or even transform himself to one of them. We cannot be sure.
5. The Tome of Reflections state that the Sage left the human space through the 'outer border'. 
6. We cannot even be sure whether the Chromium Sage was a real historical figure or just a legend. Nevertheless, the Mirrorscope is now displayed in the Museum of Time. 
7. We see them but interaction is almost impossible.
8. We see them but interaction can be forced by strong emotions. They feed on them.
9. We see them but they cannot see us. That's a pity, because if we could communicate with them, they could show us the paths through the Dreamvoid.