Great Voyage: I Built a Natural Disaster-Class Battleship

Down-and-out nobles, crazy mage, female pirate first mate, mining slave stormtroopers... This is a group of desperadoes abandoned by the empire! Hunting the behemoths of the deep sea, building steel battleships, bombarding the imperial city, killing false gods in the black realm, Erwin drew his sword and pointed to the horizon: Guys, set sail! Set sail!