Is Yuan Ying fierce or fierce later?

In the animation "Once upon a time there was a mountain with a sword", to achieve immortality, practitioners have to go through a series of processes, such as forging body, practicing qi, building foundation, empty elixir, then elixir, responding to yuan, deifying, combining, Mahayana, becoming immortal, becoming immortal, and becoming immortal king. Although there is only one step difference between Yuan Ying and then, in fact, the strength gap between Yuan Ying and then is worlds apart.