For the briefest of moments, the Star Wars galaxy came perilously close to annihilation by the Dark Side, but not by Emperor Palpatine or even Darth Vader. No, this cataclysm would have come at the hands of someone even more powerful and unexpected: Yoda.
Source：https://www.cbr.com/yoda-turn-dark-side-became-most-powerful-sith-lord-star-wars/
