Vader was plotting to usurp the Emperor, like any good Sith, so the Ring wouldn’t have to try at all to instantly corrupt what little good was left in him.
Empire Strikes Back. “Luke, you can destroy the Emperor. He has foreseen this. It is your destiny. Join me, and together we can rule the galaxy as father and son.”
Vader was plotting to usurp the Emperor, like any good Sith, so the Ring wouldn’t have to try at all to instantly corrupt what little good was left in him.
Was that in the original trilogy? Or extended universe stuff? I don’t remember anything about it but I never read any of the EU books.
Empire Strikes Back. “Luke, you can destroy the Emperor. He has foreseen this. It is your destiny. Join me, and together we can rule the galaxy as father and son.”