It would seem to make no sense that something exist before the existence of time, since the word before is, itself a reference to time...
Now you see the theoretical problem of time being created by the explosion of a flyspec. Explosions do not happen outside of, and therefore not prior to, time.

So it would appear that you were asking about something physical, rather than something astral.
Nothing there exists without cause, either.

But I suppose one might argue that such a mutation, though rare, might be possible.
Modern science has never seen any spontaneous mutation which is not a kind of cancer, making evolution impossible.

It's not even reasonable to expect cosmic radiation to form the primordial soup in which microbes supposedly formed. No amount of electricty and magnetism has ever been found to create water, much less an entire ammino acid. Yet it all came from chemicals which spontaneously formed themselves?