Vengeance of the Long Serpent (Swords and Wizardry)

From the rear cover: Pull on your hauberk, ready your shield, and take up your axe, the tide is moving out and it's time to set sail on a voyage of adventure. In Vengeance of the Long Serpent the heroes sail north in to a land murder, savagery, and madness to face a reawakened dark god and his deadly cult.