Probability Wars

A legend deep time, the Probability Wars were the first conflict, the first treachery, the first pursuit of dominance among the First Thirty One.
Occurring randomly between 100 million and one billon years ago before even the Elderday universe, the Probability Wars are what gave birth, for good or for bad, to the modern day multiverse.
What existed before the Probability Wars is hidden because of these wars, and the probability of future existence was established during the Probability Wars.