Iron Dragon

The Iron Dragon is the enormous sailing ship piloted by Blood Beard?/Enket, the Silver Claw?. It takes the form of a dragon resting in the water, with wings for sails, and it's head as a giant battle-ram. It's made entirely from iron, and powered by a huge well of coal from deep within the ship. It docks once ever 6 months at whatever city it wants, demanding a tribute of coal to refuel its wells. If they refuse, as only few have done, the ship attacks the city, breathing fire from the dragons mouth and destroying the city in swaths of greek fire.