"The time has come at last to take revenge on Asajj Ventress and the witch Mother Talzin. I have learned Ventress has returned to Dathomir. Go there, and wipe the witches out. All of them."
Arriving at the Separatist landing craft, Ventress challenged Grievous to single lightsaber combat, naming total victory in the battle as the prize. Although nearly defeated in the ensuing duel, Grievous had his battle droids attack Ventress and her army, with the Nightsister retreating from the battlefield after being injured by blasterfire. Meanwhile, Talzin used voodoomagic to set a plague upon Dooku, who was monitoring the battle from his palace on Serenno, to pressure him into calling off his attack. With Dooku unable to defend himself from Talzin's magic, Grievous was ordered to target Talzin instead of Ventress, and he personally led his troops to the Nightsister village's Hidden Cave. Talzin relinquished her magic before escaping, but Grievous's murder of Daka terminated the spell sustaining the Army of the Dead. Without the aid of their zombie sisters, the remaining Nightsisters were outnumbered and massacred. Only Talzin and Ventress evaded slaughter, with the latter leaving the ravaged Dathomir to pursue a newly foretold destiny.
"You must give up the ways of the Sith and return to our fold. You will leave Dooku's absurd war behind and remain with us, no longer to be ordered about. You will be loyal to no one but your sisters, and yourself."
―Mother Talzin, encouraging Asajj Ventress to be baptized as a Nightsister[src]
Asajj Ventress is baptized, becoming a full member of the Nightsisters.
Ventress's scheme for revenge did not go as planned: Opress broke free of her spell and turned on both her and Dooku, while the Sith Lord nearly succeeded in executing her as he had originally intended. Forced into self-exile, Ventress escaped[8] and spent some time reevaluating her life. She returned home to Dathomir[3] around 21 BBY, the second year of the war,[4] in search of sanctuary. Meeting with Talzin in the Nightsister fortress, Ventress conferred with the clan shaman on the subject of her future, as she was uncertain of what to do now that she was no longer Dooku's agent. When Talzin proposed that she leave behind the Clone Wars and the ways of the Sith, Ventress agreed to be baptized as a full Nightsister, beginning a new life with her people.[3]
Having harbored a grudge against Ventress and Talzin since their attempt on his life, Dooku monitored his former apprentice's movements and learned of her return to Dathomir. Dooku summoned GeneralGrievous, the Supreme Commander of the Droid Armies[3] and a rival of Ventress during her service to the Confederacy,[9] to his palace on Serenno and ordered him to exterminate the Nightsister witches before they continued to plot against the Sith Lord. Heeding Dooku's orders, Grievous immediately marshaled a massive detachment of the Separatist Droid Army—including droid starfighters, heavy tankartillery, and hundreds of battle droids—onto several C-9979 landing craft, then proceeded to Dathomir with his forces aboard a full fleet from the Confederate Navy.[3]
Ventress leads her fellow Nightsisters on an offensive to drive back the battle droids.
One of the supports fell on the Nightsister Karis, and though Ventress levitated the beam away with the Force, she was unable to prevent her comrade from dying. In spite of her distress that she had brought Dooku's attention to Dathomir, Ventress was left with no time for regret, as the battle droids reached the fortress shortly thereafter. Using one of the fallen supports as cover from the droid blasterfire, the Nightsister warriors took up their trademark energy bows against the invaders, while Talzin used her magic to summon a protective bubble and unleash her brand of lightning upon the droids. Recognizing that they were vastly outnumbered, Ventress stated that they would need an army to withstand the enemy invasion. Talzin agreed to speak with the elder witch Old Daka to assemble the needed reinforcements. Leaving Talzin to raise their reserves, Ventress activated her lightsabers and took up command of her fellow warriors, spearheading an offensive to drive back the droids. Organizing a multilevel strike, Ventress had some of her comrades take to the trees to rain energy arrows upon the droids from above, while she led the ground push against the eastern front of the invading army, hundreds of droids strong.[3]
Behind the Separatist forward lines of B1 and B2 battle droids came BX-series droid commandos, intended to strike down any survivors of the advance forces' firepower.[11] The Nightsister archers were able to shoot down several droid commandos before the latter reached their vantage point in the trees, while other warriors on the ground cut through the B1, B2, and BX-series battle droids with daggers. The Nightsister Luce stole two droid commandos' E-5 blaster rifles after they destroyed her energy bow, gunning down her attackers in quick succession. Ventress held her own against the Separatist troops, making quick work of her droid adversaries with her lightsabers. Supervising his battle group's progress from one of the landing craft at the deployment site, Grievous received reports that Ventress was leading the Nightsisters' assault and elected to send in[3] a Defoliator Deployment Tank, which housed an experimental Defoliatorcannon that would raze organic material to the ground without harming mechanics, such as his droid troops.[5] Once it reached the battle zone with an escort of four Armored Assault Tanks, the Defoliator Deployment Tank launched several warheads,[3] claiming the lives of a number of Nightsisters[12] and forcing the rest to take cover from the burning carnage,[3] with no cover left for the witches to escape the droids' blaster fire.[11]
At that moment, the Nightsisters' reinforcements arrived in the form of the Army of the Dead. Sustained by Daka's Chant of Resurrection, the deceased sisters were reanimated as zombies, arriving to aid Ventress to push back the Separatists.[3] The undead sisters mindlessly[13] ripped through the Separatists' ranks, smashing through everything in their path. Their arrival gave Ventress the opportunity to press her attack against Grievous and his droid army.[3]
"Surprised?" "Hardly. You're the one I was sent here for." "Then fight me alone. Prove you're the greater warrior. If I win, your army leaves. If you win, the Nightsisters will surrender to you." "I've always been greater than you!"
Ventress battles Grievous to force his army to retreat from Dathomir.
Bolstered by the numbers of the Army of the Dead, Ventress resolved to use her reinforcements to clear a direct path to Grievous's landing site. She and several other warriors commandeered an Armored Assault Tank whose droid pilot had fallen to the zombie ranks, using the tank's heavy laser cannon to destroy the Defoliator Deployment Tank. With the Undead Army clearing the way through the droids, Ventress and the Nightsisters reached the deployment site aboard their stolen tank, abandoning it to push toward the landing craft. Once Ventress arrived, Grievous disembarked from his ship with several IG-100 MagnaGuardbodyguards, ordering his battle group to hold position while Ventress issued similar orders to the Nightsisters. With their respective armies holding their distance, Ventress met Grievous in the no-man's land and challenged him to single combat, dictating that the victor of their lightsaber duel would triumph over the loser's faction—victory for Grievous would secure a Nightsister surrender, while Ventress's success would force the Separatist Droid Army to depart from Dathomir. The two longtime rivals began to duel, engaging in saberlock after saberlock as Ventress employed her dual lightsabers against Grievous's four.[3]
At one point, Grievous kicked Ventress backward, but the Nightsister responded with a furious attack, relentlessly battering at her adversary's defenses until she landed a blow on the cyborg and severed one of his arms. Yet despite being bested, Grievous ordered his battle droids to kill Ventress, forcing her to direct her attention to deflecting enemy fire. As all-out fighting erupted on the battlefield between the Separatists and the Nightsisters, one laser shot slipped through Ventress's blades, hitting her in the shoulder and providing Grievous an opportunity to exploit her momentary distraction. Before he could execute her, a horde of Nightsister zombies intervened, attacking the cyborg General while Ventress stumbled out of his range. Luce attempted to help her to safety but was fatally shot in the back by a battle droid, which Ventress Force-pushed away. After Luce died, Ventress—having seen so many comrades fall that day—retreated from the battleground and into the jungle, abandoning her coven. Meanwhile, Talzin joined Daka in the village's Hidden Cave, employing voodoo magic to inflict a plague on Count Dooku, who was holographically monitoring the battle from his palace on Serenno, in an effort to force him to cease his assault. Although Dooku refused to yield to her demands, he was unable to defend himself from Talzin's magic and thus contacted Grievous via hologram to relay new orders, as Talzin was intent upon killing the Sith Lord.[3]
Receiving Dooku's holotransmission, Grievous was told to eliminate Talzin, his clue to finding her being that the witches' magic manifested itself as green mist. Relaying their new target of Talzin to his forces, Grievous led the march to the Nightsister fortress, pressing through the warriors and zombies guarding the village. While the remaining Nightsisters mounted a defense of their home, Grievous proceeded to the Hidden Cave with a squad of battle droids. He had one of his droid commandos blast through the cave's wall with an RPS-6 rocket launcher, exposing Talzin and Daka inside. After Grievous killed Daka, the spell sustaining the Army of the Dead was severed, leaving the Nightsister warriors without their undead comrades. The few Nightsisters still defending the village were massacred by the battle droids, who carried out the onslaught without hesitation. Grievous then turned on Talzin, who summoned her magic to teleport away from his lightsaber attack and the droids' blaster fire. Nevertheless, Grievous knocked over the cauldron that had been maintaining her voodoo magic, subsequently ending Dooku's torture.[3]
The Battle of Dathomir resulted in the decimation of the Nightsisters clan.
The Battle of Dathomir[14] resulted in a victory for the Confederacy, with all of the Nightsisters killed save for Ventress and Talzin. Alone in the forest, Ventress experienced a vision of Talzin and learned of their clan's slaughter, while also being told of a new destiny by the clan mother.[3] Once again forced into exile, Ventress left to pursue her newly foretold destiny, wandering through the Outer Rim Territories and ending up on the desert planet Tatooine. There, she became involved with a group of mercenaries led by the young bounty hunterBoba Fett and accompanied them on a job on the planet Quarzite.[2] Talzin, meanwhile, remained on-world, aiding Savage Opress from afar in his search for his long-lost brother, the Sith Lord Darth Maul.[15] Despite the decimation of her clan, she believed that the Nightsisters would survive, as had been the case throughout their history.[16] When Grievous and the Separatist Droid Army departed from Dathomir,[3] they left behind the remains of their droid forces, with the wreckage of Separatist troops and vehicles scattered amidst the corpses of the Nightsisters. It was in that state that Opress found the derelict Nightsister fortress when he brought Maul to be healed by Talzin.[16]