Before we begin, it is important to note that the Before-Things do not exist. They aren't imaginary, because something imagined is something that can be conceived of, can be described to others, can even be given a physical form, if you're a decent artist. Before-Things aren't like that. They are real, in the sense that they can physically alter the world around them, but regardless of that fact, they do not exist.
Maybe it'll make more sense if I explain exactly what Before-Things are.
Before-Things are the remnants of everything that has ever been retroactively removed from reality. Obviously, no one knows what the things which have been removed are, because if anyone knew what had been removed, than it clearly hasn't been properly removed. More than likely, even the beings which caused the removal aren't even aware that they did it. All that they'd remember is performing a ritual in order to destroy something that already does not, never has, and cannot possibly ever exist. This is, for obvious reasons, impossible.
So, then, what are Before-Things? If a concept really is so utterly erased, how is it possible that remnants are left behind?
It's probably best if I explain with an example. Imagine for a moment that the color orange is retroactively annihilated. This doesn't mean that everything orange disappears, or that people start seeing different colors where orange once was, or that everyone stops considering orange to be a color distinct from red, it's just that orange, as a physical thing and as an idea, just stops. It stops ever having existed in the first place. It stops having ever not existed, because the non-existence of something necessarily implies that opposite is possible as well. Orange stops being conceivable. Not individuals, not by a cultural zeitgeist, not by the zapping of neurons, not even in the inexpressible way by which reality perceives itself. It is just fucking gone.
In this situation, what happens to foxes?
Foxes are orange, but they aren't only orange. There is more to fox-dom than just the fact that they are orange. Foxes have other colors on them. They have claws, and fur, and eyes, and many things within them that are not the color orange.
To be clear, when I say that foxes have things that aren't orange, I don't mean that they have things that aren't colored orange. They do, but that's beside the point. When I say that foxes have things that aren't orange, I mean they have things that aren't orange in the same way that a flag, even a flag that is entirely colored orange, is still a flag, and not a color. Back to foxes.
As I was saying, orange may be gone, but there's still plenty of fox left over. The problem is that foxes don't just changes colors, once orange disappears. Foxes do not suddenly become blue. Instead, the color of a fox is now something that doesn't exist, and that causes... Problems.
This, in essence, is what the Before-Things are. They're objects with traits that no longer exist. They're stuck in a paradoxical state of simultaneous existence and non-existence, and non-existence is winning. Reality doesn't recognize them anymore, and so they're being erased. That's where it ends, for most of them. They quietly wink out of ever-having-been. Some of them, though, figure out the only way they can extend their lifespan - Being recognized.
Sure, they can't get the universe to remember them, but they can get people to, and that's the next-best thing. How do they accomplish this? Doesn't matter! Most often, it's almost murdering someone. There are few times you're more focused on perceiving something than when you're fighting for your life, and trauma flashbacks will provide some sustenance for years to come.
It doesn't matter, though. They're fighting a losing battle. The question isn't whether or not they'll cease to exist, it's how long until they do.
How do you use any of this shit?
Fuck if I know.