The personal shuttle of the Sith Lord Darth Sidious during the latter part of the Clone Wars was a specially altered Eta-class shuttle. He employed this vessel for journeys, including one to the planet Mandalore, where he aimed to prevent his previous apprentice, Maul, from gaining dominance.
Subsequently, Sidious utilized the shuttle to leave the Spire, which was a fortress under the control of the Confederacy of Independent Systems located on Stygeon Prime.