"This is the weapon of a Jedi Knight," Obi-Wan Kenobi explained to him. "Not as clumsy or as random as a blaster ... to be "forbidden forms" used in ancient times by the Sith.
Luke began to pick up the pieces around 24 years after the Purge, collecting Jedi history and knowledge to restart the Jedi Order - and restart it he did, on an ancient Jedi library world.