Contrary to what Malicos told Merrin, it was not Jedi, but rather Sith and Separatists who wreaked havoc on Dathomir. After Asajj Ventress parted ways with Count Dooku, she carried a secret attack on him. Though Dooku survived the attempt on his life, he sent Separatists Army to Dathomir under the command of General Grievous to take his revenge. However, despite Ventress’ escape, the Separatists Army completely wrecked the planet which resulted in the death of the majority of the Nightsister clan.