Skywalker used Dooku's own weapon to behead the Sith Lord and end his life.
Anakin gives in to his hatred of Dooku and uses his anger to overpower him, severing both of Dooku's hands and leaving him helpless.
Studying Jedi Archive records, Dooku based his new weapon design after the curved hilts that were standard during the heyday of Form II lightsaber combat. The curve allowed the hilt to fit better into his hand, allowing for superior finesse and precise blade control.
Born in 102 BBY during the High Republic Era, Dooku was taken by the Jedi Order after being abandoned by his family and learned the Jedi arts as the Padawan of Yoda, the legendary Grand Master of the Jedi Order.
Count Dooku's red-bladed lightsaber was an elegant weapon befitting a refined man. Its gracefully curved hilt let Dooku slash and lunge with greater precision. Dooku defeated Obi-Wan Kenobi and Anakin Skywalker in a lightsaber duel on Geonosis before being bested by Yoda.
Darth Maul's double-bladed lightsaber, also known as Maul's saberstaff, was the first personal double-bladed lightsaber of Darth Maul, a Sith Lord who took part in the Invasion of Naboo and the Clone Wars.
In his guise as Supreme Chancellor Palpatine, Darth Sidious owned twin lightsabers constructed of phrik, auordium and electrum. Sidious rarely used these elegant weapons, preferring to manipulate events indirectly and in secret.
Yoda held the title of Grand Master of the Jedi Order since the days of the High Republic Era. At some point, Yoda took on a human named Kantam Sy as his Padawan. The two were stationed at the Jedi Temple on the planet Endovar.
Mission to Mathas. Padawan Windu was trained in the ways of the Force by Jedi Master Cyslin Myr.
Dooku voluntarily left the light side behind and became Darth Sidious' dark side disciple, taking the secret name Darth Tyranus and leading the Separatist army. Dooku advanced Sidious's secret plot to take over the galaxy, but forgot that betrayal is the nature of the Sith.
Sith bear their birth name as well as the name given to them by their master. The Jedi typically refer to Dooku as “Count” because that is the name they prefer to associate him with before he fell to the Dark Side. This is why, despite bearing both names, Dooku is most often described as a Count in Star Wars.
Dooku's eyes were never yellow because he did not have the same motivation and emotions as other Sith. He was an idealist who left the Jedi because he thought they had lost their way.
Anakin regrets this decision, and Palpatine reasons with him saying that Dooku was too dangerous.
The Jedi Knight then took Dooku's own lightsaber and, at the urging of Sidious, beheaded the unarmed Count Dooku with the Sith Lord's own weapon. Once Skywalker escaped with both Kenobi and Palpatine in tow, Dooku's lightsaber was left behind aside Dooku's corpse in Grievous' quarters on the Invisible Hand.
Dooku's fall from grace has left Yoda seriously disappointed as he felt Dooku had been lost to the Dark Side and redemption is lost when he had numerous Jedi killed in Geonosis while kickstarting the Clone Wars to boot.
As Anakin's powers grew, Mace Windu's respect for Anakin grew, but his trust never did.
Darth Plagueis was a legendary Dark Lord of the Sith trained by the Sith Master Darth Tenebrous.
Born on Coruscant circa 80 BBY (Before the Battle of Yavin), Qui-Gon trained as a Padawan under Jedi Master Count Dooku.
Yoda confronted Sidious in the heart of the Senate chambers. This erupted into an intense duel between these masters of the Force, a fight that Yoda ultimately lost and was forced to flee. With the Galactic Empire triumphant, Yoda and Obi-Wan were the last of the Jedi.
In the Star Wars Legends continuity, the founders of the Jedi Order were Jedi Masters Cala Brin, Garon Jard, Rajivari, and Ters Sendon.
Billaba became Windu's Padawan and trained under the Jedi Master in the ways of the Force. During her training, Windu allowed her to study Form VII variant known as Vaapad. She eventually became a Jedi Knight, renowned for her skills with a lightsaber and favored Form III when teaching other Jedi.
During the Separatist crisis, Amedda was Palpatine's advisor, helping keep the Senate in line during debates and serving as aide and emissary. Amedda helped arrange the Senate vote to give Palpatine emergency powers by taking advantage of Representative Jar Jar Binks's eagerness to be of service.
It is subsequently revealed that Palpatine had a son (who was his clone) whom he named Dathan, who renounced him; he and his wife, Miramir took their daughter Rey to the planet Jakku, assuming lives as "nobodies" to keep her safe.
Kylo Ren's Lightsaber Form
The evidence isn't entirely clear, but it is most likely that he was an adherent of Form V, particularly the Djem So variant. Ren's fierce fighting style has the hallmarks of Djem So, which demands a high degree of speed and strength to execute a flurry of attacks and counterattacks.