culture

Which cultivation breakthrough is hardest for new Mortal's Journey viewers to understand?

Realm lists are easy to memorize and still fail to explain the story. Foundation Establishment depends on scarce resources and access; Core Formation changes lifespan and combat status; Nascent Soul changes how a cultivator survives, travels and participates in regional politics. The useful question is not only 'what comes next?' but 'what becomes possible after this breakthrough?' Which stage did the animation explain least clearly for you, and what single scene or comparison would have made it understandable?