During the Clone Wars, Jmmaar was again assigned to work with Jedi Master T'chooka D`oon. Together, Jmmaar, D'oon, and D'oon's Padawan, Flynn Kybo were tasked with extracting Senator Quiyyen from the planet of Vandos to avoid Separatist capture. Unfortunately, the Jedi arrived following the Separatists and found themselves battling against General Grievous and his battledroids. During the fight, Jmmaar fought against Grievous himself and was cut down to become one with the Force. His thirst for vengeance quenched, Grievous claimed Jedi Master Jmmaar's lightsaber for his growing collection kept by the cyborg general.