How did Darth Vader die?

Empatojayos Brand was a Jedi Knight during the waning days of the Old Republic. Brand was apprenticed to Jedi Master Yaddle. Empatojayos was very aggressive and vain, but he overcame his personality flaws to become a full fledged Jedi Knight. He survived the Great Jedi Purge, but at the cost of being severely injured by Darth Vader in a ship battle, which sent him hurtling through a gas nebula near Nar Shadaa. However the Ganathans saved him, gave him a cyborg body, and made him their king. He returned from his self-imposed exile when the Solos, fleeing from bounty hunters, stumbled upon his hidden world, and informed him that Vader was dead. Brand decided that he should aid Luke Skywalker in his attempts to restore the Jedi Order; he proved instrumental during the events of Dark Empire in defeating Dark Siders on New Alderaan. Empatojayos died on Onderon when he sacrificed himself to save the baby Anakin Solo from being filled with the essence and mind of Emperor Palpatine's clone; Empatojayos intercepted Palpatine's spirit preventing the Emperor from taking power from young Anakin Solo. His soul connected to Palpatine's, the two died together, freeing the galaxy from the Emperor's reign forever.