Palpatine's blue-bladed lightsaber

A blue-bladed lightsaber belonged to the Sith Master Darth Sidious after his resurrection on Byss.

History
In his lab on the Imperial throne-world, Palpatine kept a number of stolen Jedi lightsabers if he needed them. In 10 ABY he discovered onboard his super star destroyer Eclipse that Luke Skywalker renounced the dark side thanks to the efforts of his twin sister, Leia Organa Solo. Enraged, Palpatine used the lightsaber to attack Luke. Despite the Sith Lord's ferocius power, he was caught off guard by Skywalker. Mere minutes later, the Eclipse was destroyed along with Palpatine's clone.

Appearances

 * Dark Empire 6: The Fate of a Galaxy