Lord Corvax's Lightsaber

Lord Corvax's Lightsaber, often referred to as a Lightsword, was an ancient lightsaber that was wielded by Lord Dorwin Corvax, the husband of Lady Corvax.

After Dorwin's death, Lady Corvax tried to resurrect him using the Bright Star to power the Aeon Engine. This partially failed, trapping Dorwin between the living world and the next one. After this event, Dorwin came to be known as the Black Bishop, and the planet Mustafar was transformed from a verdant place into an inhospitable lava world. Lady Corvax hid the Lightsword away in her Sanctum.

Many years later during the Imperial Era, the Black Bishop would end up giving the Lightsword to one of his descendants. This new owner would use it to command an army of ancient droids known as the Marching Horde, duel Darth Vader, and destroy the Bright Star and Aeon Engine. Dispatching the Bright Star and Aeon Engine destroyed the Lightsword's Kyber crystal, after which could no longer project a blade. Back on the descendant's ship, the Windfall, the descendant and ZO-E3 discovered that when combined with an artifact they recovered, the Lightsword also projected a star map from Mustafar to somewhere in Wild Space.

Text and facts from the “Lord Corvax's Lightsaber” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.