Did you ever hear the tragedy of Darth Plagueis The Wise? I thought not. It’s not a story the Jedi would tell you. It’s a Sith legend. Darth Plagueis was a Dark Lord of the Sith, so powerful and so wise he could use the Force to influence the midichlorians to create life… He had such a knowledge of the dark side that he could even keep the ones he cared about from dying. The dark side of the Force is a pathway to many abilities some consider to be unnatural. He became so powerful… the only thing he was afraid of was losing his power, which eventually, of course, he did. Unfortunately, he taught his apprentice everything he knew, then his apprentice killed him in his sleep. Ironic. He could save others from death, but not himself.

As we learn in Star Wars: Darth Plagueis, the apprentice spoken about briefly, is none other than Sheev Palpatine himself. Darth Plagueis is killed just before Palpatine takes control of the senate. In accordance with Sith traditions, Palpatine has Darth Plagueis cremated and placed in a spirit jar, which can be seen briefly during Star Wars: The Revenge Of The Sith.

I hope this is all you need to know about the tragedy of Darth Plagueis The Wise. If you want more lore, please let me know in the comments.