Visions often contain distinctive qualities that are lacking in dreams. The unconscious mind, even in a lucid state, cannot retain such clear images when the mind has returned to reality; nor does it allow tastes to linger in one's mouth for that matter. Such was the case one night when Ben Solo went to sleep.
He could feel the beings-both human and non-human alike- bound by the Force, yet tangled in combat. Ben didn't know why they were fighting, but almost every face held a mix of anger and betrayal. What struck him the most, however, was how many Jedi and Sith there were. As far as Ben knew, the only people who wielded lightsabers were he, Rey, Luke's handful of Padawans, and the Knights of Ren. But this was a number far greater.
Were Jedi and Sith currently in hiding? Was this taking place in another galaxy? Or was this a vision of the future? Either way, now was not the time for questions. In that moment, it would be far more helpful to gather evidence so he could later piece together an answer.
Ben stepped fluidly through the vision, the swirling fog showing one-on-one combats at different locations. He looked for something to connect the pattern, but there was none, save for the fact that each being appeared to be Force-sensitive and in some sort of emotional distress. He saw fighting in forests to deserts, and from buildings to starfighters. What could it all mean?
Finally, Ben came across a face he recognized. It was a more mature version than the one he was used to, without the boyish roundness. Then it dawned on Ben: the man was one of Luke's Padawans.
Ben turned to the attacker, wondering who was challenging the person he knew, when he realized the attacker was also one of Luke's other Padawans, though this one wielded the red blade of a Sith.
Ben called out each of the boys' names, but as he did so the vision spiraled out into the blackness of space as Ben's consciousness returned to the present.
What Ben didn't know was that the moment his eyes opened, Rey's eyes closed for a similar reason.