In our campaign, the fleet of the Shadow Council has included:
The Chains of Judgement, the raider from an introductory adventure we rapidly sold off. My apostate suggested renaming it 'The Liberation' which was seen as a twisted jest by other Council members (the original inhabitants we had sold first).
The Shadowclaw, a sword-class frigate and until its recent mauling the flagship of the Council. The next session will decide its fate but I suspect it will be left behind in our newly conquered system for repairs.
The Hand of Jericho, a lunar-class cruiser retrieved from the warp and purely fitted for gunnery. Centuries ago it was in the posession of the Rogue Trader dynasty of...Haarlock.
The Diamond Blade, a sword-class frigate and flying pleasure palace. A Slaaneshi vessel heavily under the thumb of my apostate - until its recent hulking in a space battle. Its gilded hull proved problematic when fired upon by several system defense monitors.
Nurgle's Sleigh, a defiant-class light cruiser dedicated to Papa Nurgle under the guidance of Nicholas Santos.
The Angel of Woe, a sword-class frigate (I believe) ruled by a Fallen Dark Angel.
The Skull of Drusus, a generic transport solely equipped to carry two barracks worth of troops and deploy them to planetary surfaces.
The Ragged Edge and The Darkened Eye, a pair of wolfpack raiders sworn to the Council's cause.