Dread Barge of Karn

Publisher's blurb:

The Dreadbarge is feared across the nine seas. The ship would look rather mundane if not for the cages hanging from it’s side, often with the dead and dying inside. It’s said a powerful druid controls this vessel hunting down those who they see as not belonging on the oceans waves. Below deck the ship holds a long area flanked by stone statues ending in a large stone throne.