The sixth chapter of the Ahsoka series on Disney+ revealed much that Star Wars fans have been waiting for since the series was announced. The episode revealed the whereabouts of Ezra Bridger, and how the nine years since he departed changed him. It also revealed Grand Admiral Thrawn, and how little that same time has changed him. However, the revelation of the Great Mothers and the ruins of the Great Witch Kingdom of the Dathomiri make these dark side magic users the most powerful group in all of Star Wars.
Source:https://www.cbr.com/ahsoka-nightsisters-dathomiri-most-powerful-group-star-wars/