The Non-Canon Expert looks at the lessons Luke Skywalker learned about the dark side after he joined the returned clone of Emperor Palpatine six years after the Battle of Endor, explaining why he made the decision to join Palpatine, how the truth he learned about the dark side could help him and the Jedi fight against it, and how this compared to Jedi teachings that existed millennia before Luke’s path with the dark side. This is a Legends story for Luke Skywalker and the events that occurred after Episode 6: Return of the Jedi with information found in a number of Legends sources, but primarily within «Star Wars: Jedi vs. Sith: The Essential Guide to the Force.»
