The story where Dream rewrites the entire universe to role-reversal cat masters and human pets was one of the more impressive examples of an Endless's power.
Was also a funny story, on account of the fact it depended on an entire race agreeing on the same goal, implying cats are so capricious they'd never be able to get on the same page and restore the natural order of cats dominating humans.
This story igores the fact that dogs would almost certainly be treating cats and humans like chew toys, if all it takes is a concensus of dreams. 🙂