Gallows Born - The Bane of the North, Book 1 - A.C. Salter

Born on the gallows, the corpse of his mother swinging from the rope above, the villagers brand him The Bane of the North and leave him out for the Fug to claim - a deadly fog ruled by Draugr - Viking warriors that had long ago fallen in battle. They didn’t expect to find him the next day, tattooed with the mark of an ancient god.