I'm not very familiar with 'el fuego del destino based on a true story' specifically. It could be a movie or a book. Maybe it's about someone's journey full of challenges and how they overcame difficulties in a real - life - inspired scenario.
Well, without having read 'viviendo con el emperador' web novel, we can only speculate. It may tell a story of a common person who suddenly finds themselves in the presence of an emperor. This could lead to a series of adventures, like getting involved in palace conspiracies, or learning about the emperor's secrets. It might also be about the cultural and social aspects of the imperial era that the characters are living in.
Finding the 'viviendo con el emperador' web novel can be a bit of a challenge. You could try doing a general web search using search engines like Google. Include the full title in the search query. If it's a relatively unknown web novel, it might be on smaller, more niche web novel communities or forums. You can also ask in online groups dedicated to web novels if anyone has come across it.
In a cultural context, if 'el vate bases on el dasa story', it could mean the preservation of certain cultural values. 'El dasa story' might be a traditional story that contains important cultural elements. 'El vate' then becomes a way to carry on these elements. For example, if 'el dasa story' is about family loyalty, 'el vate' could promote the same value in a different form.
A scary El Salvador story is that of the Xtabay. It's said to be a female spirit that lives in the jungle. She sings a beautiful but hypnotic song that draws men to her. Once they are close, she either kills them or drives them insane. This story was often told to keep people, especially men, from wandering too far into the dangerous and uncharted parts of the jungle, as the unknown held such terrifying entities.