How exactly does a Scratch work?

I am guessing you missed the post I just made talking about everything we know about the Scratch. Long story short, though- The Scratch releases powerful Time and Space energies that Skaia interprets as a ‘request’ to change the Universe, and uses this Energy to change where the Meteor Defense Portals send the Babies, effectively creating a new Reality with a different set of parameters, and making the current reality Cease to Exist within the Universe.