General Grievous

General Grievous, a Kaleesh warlord rebuilt as a cyborg, commanded the Separatist Droid Army and fought with up to four stolen Jedi lightsabers at once. Count Dooku trained him as a duelist. He kidnapped Chancellor Palpatine during the Battle of Coruscant, escaped the Invisible Hand, and fled to Utapau, where Obi-Wan Kenobi destroyed his remaining living organs and ended his command of the droid armies.