The Unrecorded Pages was a realm that is the convergence of all timelines thrown away. Beginning and End fought a battle that branched out into numerous timelines. All those other timelines are treated as 'have already happened, and only one timeline remains in their perspective.
And as timelines were abandoned by most gods and fallen as their true bodies would only exist in one, these worlds became a scourge and a terror.
Destiny had seen how these timelines led to chaos. And so, while Fate listed her intentions, and while it was true that Kyros would be outside of his sight, that world was just too chaotic and distorted that surviving and finding food would even become a matter of question. Even he didn't know how one would return once the person is thrown over to the Unrecorded Pages! This was a timeline of chaos! It was destined to never meet the one true timeline for eradication and cessation. The power of Pausontai had already set the utter end of it.