Darth Plagueis: Star Wars Legends

Darth Plagueis: Like all Sith Lords before him, he craves absolute power. But like no Sith Lord ever, he possesses the ultimate power–over life and death.
Darth Sidious: In secret he masters the power of the dark side, while publicly climbing to the highest government office.
One desires to rule supreme; the other dreams of living forever. Together, they will destroy the Jedi and rule the galaxy. Unless merciless Sith tradition becomes their undoing. . . .