Nightsister
It was only then that Ventress found herself returning to her roots. Secreting her way back to the planet Dathomir, Ventress began to explore her connections to the Nightsisters, all the while plotting her revenge against Dooku. Ventress became an assassin once more, re-embraced by the Nightsisters and taught in their ways and Force magicks—first as a warrior in her own right, and then as the shaper of the Nightbrother agent Savage Oppress, a would-be agent offered to Dooku but in reality intended to betray him to the Nightsisters and Ventress.
