Mission to Raxus Jedi Master Quinlan Vos and bounty hunter Asajj Ventress undertook a mission to assassin ate Count Dooku , who was attending a gathering on the Confederate capital world of Raxus to receive the Raxian Humanitarian Award for his service in the Clone Wars . The Jedi Council had earlier sent Vos to assassinate Dooku in an effort to bring a speedy end to the conflict . Vos enlisted the help of Ventress , who trained him in the dark side of the Force . Despite their planning and precautions , the two Force - users were no match for Dooku who defeated Vos and took him prisoner . Only Ventress escaped to warn the Jedi of Vos ' capture . Prelude . Following Count Dooku ' s massacre of civilians on Mahranee , the Jedi Council resolved to assassin ate the Separatist leader in order to bring a speedy end to the Clone Wars . For this mission , the Council assigned Master Quinlan Vos to kill Dooku . Vos accepted the mission but also enlisted the help of Asajj Ventress , a former Dark sider and a bounty hunter . After working together as bounty hunters for a brief stint , Vos revealed his true identity and Ventress agreed to help him kill Dooku due to hatred for her former Sith master . Ventress took Quinlan to her adopted homeworld of Dathomir where she trained him in the ways of the Nightsisters , a cult that used the dark side . Following a rigorous training program , Ventress learned from one her Separatist contacts , the Gossam Sumdin , that Dooku was planning to visit Raxus , a planet in the Tion Hegemony . Dooku was planning to give a speech at a public celebration there . After Vos completed his final trial by using the dark side to kill a crustacean creature called The Sleeper , Ventress deemed him ready to face Dooku . Together , the two Force - users departed on her starship , the " Banshee " to Raxus . The mission . Going undercover . Upon landing in Raxulon , the capital city of Raxus , Vos and Ventress donned their disguises and rendezvoused with Sumdin in the spaceport . After Sumdin had given them the invitations to Dooku ' s function , Ventress killed her with her lightsaber . When Vos expressed revulsion , Ventress responded that letting Sumdin live would allow information to leak out about their operation . As they approached Raxulon ' s public square , the two Force - users used mind trick s to convince a guard to let them through without checking for weapons . The public celebration was a Separatist ceremony to award Dooku with the Raxian Humanitarian Award . Count Dooku addressed the crowd from a balcony with General Grievous standing at his side . During the speech , Dooku lauded the Confederacy for calling for change and equality . He then attacked the Galactic Republic and the Jedi for meeting their demands for reform with brutal military force . Before accepting the humanitarian award , Dooku concluded by stressing the justness of the Separatist cause and disparaging the Republic ' s Clone trooper s as slaves who had been sent to their deaths . As the public banquet began , the two assassins put their plans into action . While Ventress would lure Dooku to a lonely place , Vos would overpower Grievous and his battle droid escorts . Asajj managed to mingle with the crowds and encountered her former Sith master . She managed to challenge Dooku to a fair fight at the overlook . The Count accepted the offer but then moved away discreetly to contact Grievous for reinforcements . Meanwhile , Vos managed to ambush Grievous and his battle droids . Following a struggle , he locked the cyborg general in a chamber and then went to join Vos at the overlook . Upon arriving at the overlook , Dooku tried to contact Grievous but received no response , leaving him to fight the two assassins alone . Fighting darkness with darkness . Dooku attempted to distract his opponents by drinking a glass of Alderaanian wine . Before Vos and Ventress could strike him with their lightsabers , Dooku drew his and ducked . As the three Force - users parried with their lightsabers , Quinlan remembered Asajj ' s lesson and gave into his pain and hatred in an effort to harness his dark side powers . Ventress then managed to fight her former master to a corner and both fighters had their blades intersecting with each other . However , Dooku managed to shove her aside and sent her sprawling to the floor . Enraged by Dooku ' s assault on Ventress , Vos charged at the Sith Lord behind . However , Dooku whirled around and caught Vos ' strike with his lightsaber . As they parried , Vos tried to stab Dooku in the chest but the Sith Lord twisted out of the path of his lightsaber . Vos then made the mistake of circling Dooku despite Ventress ' s warnings . This allowed Dooku to levitate Quinlan with the Force and shove him against a pillar , temporarily knocking him out . The Sith Lord then turned his attention to Ventress and used the Force to shove her against another pillar , knocking her unconscious . Sensing Quinlan ' s grief and fear , the Sith Lord taunted the undercover Jedi by asking him how many Jedi vows he had broken to destroy him . Enraged by Dooku ' s taunts , Vos parried with the Sith Lord . Ventress stirred and tried to warn her former pupil not to listen to Dooku . Emboldened by Ventress ' survival , Vos continued his lightsaber duel with Dooku . The Sith Lord then remarked that the dark side was stronger in Quinlan than in his former apprentice Ventress . Dooku also attempted to sow discord between the two assassins by claiming that Ventress had not properly taught him in the ways of the dark side . Their duel was interrupted by the arrival of General Grievous . Vos managed to kick him , causing the cyborg general to tumble over the railing . However , Grievous then grabbed Ventress ' arm and dragged her down with him . Fearing that Ventress would die , Quinlan physically attacked Dooku and kicked him hard in the face . However , Dooku seemed unharmed and instead goaded the Jedi into using his anger . Giving into his anger , Vos parried with Dooku and managed to knock the Sith Lord ' s lightsaber out of his hand . With his lightsaber a centimeter away from Dooku ' s throat , Vost tried to decapitate the Sith Lord . However , Dooku grabbed Vos ' s wrist before he could deliver the blow and tackled him to the ground . Dooku subdued Vos by planting his knee on the Jedi ' s back . Vos was unable to free himself since Dooku ' s strength was augmented by the Force . Dooku then twisted his armed and deactivated his lightsaber . Meanwhile , Ventress landed on the edge of the lower level . Grievous landed on top of her and placed his metallic foot on her throat . The cyborg then grabbed Ventress and hurled her down to the level below . Ventress managed to survive her fall and managed to fight off Grievous . As she fled Grievous and his droid reinforcements , she used the Force to retrieve Vos ' fallen lightsaber . Aftermath . Quinlan Vos and Asajj Ventress ' s assassination attempt against Count Dooku failed due to the Sith Lord ' s mastery of the dark side and the timely arrival of General Grievous . Having captured Vos , Dooku then struck him with Force lightning , knocking the Jedi Master unconscious . As he slipped into unconsciousness , Vos caught side of Ventress fighting off battle droids and fleeing into sewers . Despite being pursued by Separatist droid forces , Ventress managed to escape offworld on her ship , the " Banshee " . Before fleeing offworld , Ventress vowed to rescue her lover Vos . Meanwhile , Vos was taken captive by Count Dooku and imprisoned at his palace on Serenno . There , Vos was subjected to extended periods of torture and psychological manipulation . Dooku managed to turn Vos to the dark side and recruit him as his new Sith apprentice by revealing that Ventress had murdered his late Master Tholme . In secret , Vos planned to gain Dooku ' s trust in order to force Dooku to lead him to his mysterious master Darth Sidious and destroy the Sith Order once and for all . Unwilling to abandon her lover to Dooku , Ventress hatched a rescue mission with the help of Boba Fett ' s bounty hunter syndicate . However , Vos , consumed by his hatred for Ventress , spurned her rescue offer .