Those who followed the light side of the Force and had the appropriate training could achieve a form of immortality by retaining their consciousness after their physical deaths. Qui-Gon Jinn rediscovered this ability and, in turn, taught Yoda and his apprentice Obi-Wan Kenobi how to attain it.
Ultimately, Yoda gained a new understanding of true selflessness and of the Force, came to realize his hubris and the mistake the Jedi Order committed by becoming warriors, and unlocked the secret of Force immortality. As the Clone Wars raged on, Anakin and Obi-Wan had become heroes of the Republic.
Darth Plagueis discovered immortality through Midi-chlorian manipulation. Nevertheless, he was unable to prevent his own death in 32 BBY.
He found the key to immortality.
By using the living and cosmic Force in tandem, he was able to unlock the secrets of eternal life. He shared his knowledge with Yoda in Season Six of Star Wars: The Clone Wars, telling Yoda, "I am a manifestation of the Force, a Force that consists of two parts.
In the book, Palpatine is revealed to have discovered the "secret to immortality" from his former master, Darth Plagueis, using this knowledge to survive after his death in Return of the Jedi.
Those who followed the light side of the Force and had the appropriate training could achieve a form of immortality by retaining their consciousness after their physical deaths. Qui-Gon Jinn rediscovered this ability and, in turn, taught Yoda and his apprentice Obi-Wan Kenobi how to attain it.
Darth Sidious was the secret persona of Sheev Palpatine and the Sith apprentice of Darth Plagueis. The time period of when Plagueis came to possess his Sith apprentice was unknown, but the Dark Lord chose Sheev Palpatine, a human from Naboo, as his apprentice.
Not only did the Dark Lord deem the project a failure, his efforts ultimately backfired and caused the midi-chlorians to create Anakin Skywalker, the prophesied Chosen One of Jedi legend who was destined to restore balance to the Force by destroying the Sith.
1 Darth Sidious
There has been no Sith, as powerful, meticulous, nor as evil as the Emperor himself, Darth Sidious. As previously mentioned, Sidious trained in the Dark Side by Darth Plagueis before Sidious killed Plagueis in his sleep, making Sidious a Sith Master.
Palpatine tells Anakin of the legend of Darth Plagueis, a Sith Lord who was said to be so powerful he could both create life and prevent people from dying.
If Qui-Gon had survived his fight against Darth Maul, he would have sensed Palpatine's evil, and Anakin wouldn't have become Darth Vader. Thus, while Qui-Gon was less powerful than Yoda, Palpatine feared him more.
The tale told that Darth Plagueis, Sidious' Sith Master was so powerful and so wise that he could use the Force to influence the midi-chlorians to create life—which Plagueis could in fact do, and even save others from death, which he proved by killing and bringing back to life his own master's secret apprentice, Darth ...
Yoda was a legendary member of the Jedi Council as a Grand Master of the Jedi Order and member of a mysterious species capable of living for centuries. He was stronger than most in a connection to the Force and though he was small in size, he'd been so powerful and wise having had trained Jedi for several centuries.
The species had a very long life expectancy, spanning at least several centuries; Yoda lived nearly a thousand years before dying of old age, and they aged very slowly, remaining in infancy for at least fifty standard years.
Master Yoda has risen above all others to claim the top spot as the most powerful Jedi of all time and the true chosen one according to IGN's audience. He won pretty handily as well, as he was victorious in 89,756 of his 95,243 battles and had a win percentage of 94.2%.
Yoda still stands as one of the most powerful characters in Star Wars, yet even he couldn't defeat Palpatine. After their battle in Revenge of the Sith, Yoda felt beaten and fled into exile on Dagobah, where he hid away for 19 years.
killed by an Imperial strike team, his dark side, like many Seth before him, refused to let go of life.
Why Darth Plagueis Was Terrified of Anakin But Sidious Embraced and Trained Him - YouTube.
That said, both Yoda and Yaddle have a high midi-chlorian count in their blood. Yoda's m-count was roughly 18000, while Yaddle's was closer to 12000. It is reasonable to assume that whatever species they are a part of, it is a deeply Force-sensitive one.
Palps recounting Darth Plagueis's story to Anakin. Plagueis had attempted to glean the secret to eternal life. According to the theorist, Palpatine learned this secret from before killing his master. However, instead of cloning himself at first, Palpatine cloned Plagueis, resulting in Snoke.
Because as soon as Kylo defeated Snoke, Darth Plagueis infected him. He is no longer Kylo Ren, he is now assumed by Darth Plagueis, and it is Darth Plague's desire to rule.
According to Star Wars Legends content, the first Sith was a former Jedi Master, Ajunta Pall, who became a so-called Dark Jedi, or “Fallen” Jedi. As the name implies, these Force-sensitives chose to practice the Dark Side, and rejected the Light Side of the Force.
Star Wars Legends literature elaborates on Plagueis's life, apprenticeship under the Bith Sith Lord Darth Tenebrous, and mentorship of Palpatine, up until his death at the latter's hands.