Am I the only one who thinks that the dazzlings are the darkest villains. Lets think about this for a second. They are the only villains to be banished to another world. Starswirl the bearded banished them himself because it was the only way he could actually get rid of them. Unlike all the other major threats including Tirek and Sombra who are pretty dark. They were all taken care of or defeated in equestria. The sirens were only the ones banished.
And that happened 1000 years ago. Think about Siren feed on negativity and anger. Which caused the ponies to fight which brought the windagoes, who almost brought ponies to extinction thanks to what we know about the story that formed equestria. They were stopped and thus equestria was created. After this all those bad things happened, probably more in this order. Tirek, Discord, Sombra, Nightmare moon. They caused all those bad things to happen.
And if they were sent to the human world, while we don’t know a whole lot we can assume its very similar to ours and when you think about the many wars we have in our world that could have possibly, happened back then. There a good chance it happened in there world and it could have happened due to the sirens. That would be a lot of deaths and war including the most gruesome war ever WW2 which was horrific. Like let that sit for a minute, if the human world had a world where there was a ww2, which resulted in about 12 millions deaths and that doesn’t include soldiers. And I don’t think they would care in the slightest, they need that negativity energy to feed on and if that means feeding on people who can cause bloodshed and genocides then I don’t think there going to care that much.
Having said all of that I truly think the Sirens are the darkest villains and also why think they have little backstory or info on them and if the staff were to go into detail about them, then MLP wouldn’t be a g rated show