This was the personal curved-hilt lightsaber of Dooku, the Count of Serenno. The former Jedi Master, who became Darth Tyranus and the political leader of the Separatist Alliance, handcrafted the weapon’s unique hilt with a kyber crystal that emitted a red blade. As the apprentice of the Dark Lord of the Sith, Darth Sidious, Dooku used the Sith blade against his foes.
The weapon was built for the purpose of lightsaber combat, and the Sith Lord carried it with him into numerous battles during the Clone Wars, a conflict he and his master orchestrated from both sides. In his final bout, Dooku lost his Sith lightsaber to the Jedi Knight Anakin Skywalker once he was defeated in a duel aboard the starship Invisible Hand. Skywalker used Dooku’s own weapon to behead the Sith Lord and end his life.