The Unidentified Battle Dreadnought, a temporary designation given by the Chiss, known as the HopeBreaker, was a Shatter-class WarMaster belonging to the Grysk. This warship engaged the Chiss Ascendancy's military over the planet called "Sunrise" amidst the Nikardun campaigns. During a subsequent battle over Sunrise, the HopeBreaker met its end, being utterly destroyed.
Timothy Zahn's 2021 novel, Thrawn Ascendancy: Greater Good, marked the initial introduction of the HopeBreaker.