Darth Plagueis
this was the Sith Lord who trained Darth Sidious in the ways of the Dark Side of the Force. Chancellor Palpatine related the story of Darth Plagueis to Anakin Skywalker, shortly after the First Battle of Coruscant. According to Palpatine, Darth Plagueis had the ability to influence the actions of the midi-chlorians, and could manipulate them in such a way as to keep those beings closest to him from dying. It was even said that Plagueis had the ability to create life. Ultimately, however, Plagueis became blinded by the pursuit of power, and was killed in his sleep by his apprentice. As Palpatine retold the story, which he referred as a legend called The Tragedy of Darth Plagueis the Wise, it was ironic that Plagueis had the power to save others from death, but not himself. The story of Darth Plagueis was one of the primary reasons it was believed that Anakin chose to ally himself with Palpatine, since the young Jedi Knight was having visions of the death of his wife, Padme' Amidala. It was later theorized that it had been Plagueis who caused Anakin to be brought to life, since Shmi Skywalker was known to have never married or had conjugal relations with a man before Anakin's birth. This was never proven, however.