ROSE: When [Skaia] is asked to change everything, there is only so much it has control over.
ROSE: In fact, it has control over exactly one thing. The defense portals.
ROSE: It can decide to send important meteors to different points in time than originally planned, thus creating alternate realities.
ROSE: Offshoots of promise, rather than futility.
ROSE: And it turns out the most important meteors of all tend to be the ones delivering the young players to their planet.
ROSE: So all it has to do to change everything is tweak their destination times a bit.
ROSE: All internally-prompted changes in the post-scratch universe are decided entirely by this modest adjustment to the parameters.
ROSE: It's a very simple concept, actually.
ROSE: Yet the consequences are dramatic. It results in not only a hard reset for the session, but a partial reset for the universe too, due to the many causal entanglements between a session and its originating universe.