Over the years, Star Wars fans have learned more and more about the way of the Jedi, from how Force sensitivity works to how Force projection can be used. But the Sith are much more mysterious, and there are multiple sectors and groups who use the Dark Side in their own ways. For example, we saw the Dathomiri Nightsisters in Ahsoka as they helped Thrawn by reviving an entire dead army, and the Knights of Ren appeared in The Rise of Skywalker.
