The Emperor's Fist.
The Emperor's Fist was an Imperious-class Star Destroyer in service of the Imperial Navy of Darth Krayt's Galactic Empire. The first of it's class, the Emperor's Fist was placed under command of a Kaleesh general named Nyax jal Sk'ar. After a failed attempt by Darth Krayt's agents to kill Sk'ar, as he disliked the Kaleesh because of his attitude, the General defected to Roan Fel, bringing the Emperor's Fist in service with the Empire-in-exile. As Sk'ar continued being a general, he was given command of the Bastion Third Fleet, which the Emperor's Fist became the flagship of.