Emperor Palpatine's death should have meant the end of the Sith in Star Wars, but thanks to Yoda's most famous trick, it was just the beginning.

Palpatine used his power over the dark side to crush his foes, with Darth Vader's distant relative commanding a Force ability ...

The apprentice who kills Plagueis that story is referring to is meant to be Palpatine, Darth Sidious. But before Sidious, the idea appears to be that during his artificially extended life ...